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src/main.c
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Paul Smith
* all: Update copyright year to 2025
24 авг 2025, 03:11
24 авг 2025, 03:11
e7a9508
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/* Argument parsing and main program of GNU Make. Copyright (C) 1988-2025 Free Software Foundation, Inc. This file is part of GNU Make. GNU Make is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ #include "makeint.h" #include <assert.h> #if MK_OS_W32 # include <windows.h> # include <io.h> # include "pathstuff.h" # include "sub_proc.h" # include "w32err.h" #endif #if MK_OS_OS2 # include <sys/types.h> # include <sys/wait.h> #endif #ifdef HAVE_FCNTL_H # include <fcntl.h> #endif #if MK_OS_VMS int vms_use_mcr_command = 0; int vms_always_use_cmd_file = 0; int vms_gnv_shell = 0; int vms_legacy_behavior = 0; int vms_comma_separator = 0; int vms_unix_simulation = 0; int vms_report_unix_paths = 0; /* Evaluates if a VMS environment option is set, only look at first character */ static int get_vms_env_flag (const char *name, int default_value) { char * value; char x; value = getenv (name); if (value == NULL) return default_value; x = toupper (value[0]); switch (x) { case '1': case 'T': case 'E': return 1; break; case '0': case 'F': case 'D': return 0; } } #endif #if defined HAVE_WAITPID || defined HAVE_WAIT3 # define HAVE_WAIT_NOHANG #endif #ifndef HAVE_UNISTD_H int chdir (); #endif #ifndef STDC_HEADERS # ifndef sun /* Sun has an incorrect decl in a header. */ void exit (int) NORETURN; # endif double atof (); #endif #include "commands.h" #include "debug.h" #include "dep.h" #include "filedef.h" #include "getopt.h" #include "job.h" #include "os.h" #include "rule.h" #include "shuffle.h" #include "variable.h" #include "warning.h" static void clean_jobserver (int status); static void print_data_base (void); static void print_version (void); static void decode_switches (int argc, const char **argv, enum variable_origin origin); static void decode_env_switches (const char *envar, size_t len, enum variable_origin origin); static void disable_builtins (); static char *quote_for_env (char *out, const char *in); static void initialize_global_hash_tables (void); /* True if C is a switch value that corresponds to a short option. */ #define short_option(c) ((c) <= CHAR_MAX) /* The structure used to hold the list of strings given in command switches of a type that takes strlist arguments. */ struct stringlist { const char **list; /* Nil-terminated list of strings. */ unsigned int idx; /* Index into above. */ unsigned int max; /* Number of pointers allocated. */ }; /* The recognized command switches. */ /* Nonzero means do extra verification (that may slow things down). */ int verify_flag; /* Nonzero means do not print commands to be executed (-s). */ static int silent_flag; static const int default_silent_flag = 0; static enum variable_origin silent_origin = o_default; /* Nonzero means either -s was given, or .SILENT-with-no-deps was seen. */ int run_silent = 0; /* Nonzero means just touch the files that would appear to need remaking (-t) */ int touch_flag; /* Nonzero means just print what commands would need to be executed, don't actually execute them (-n). */ int just_print_flag; /* Print debugging info (--debug). */ static struct stringlist *db_flags = 0; static int debug_flag = 0; int db_level = 0; /* Synchronize output (--output-sync). */ char *output_sync_option = 0; /* Environment variables override makefile definitions. */ int env_overrides = 0; /* Nonzero means ignore status codes returned by commands executed to remake files. Just treat them all as successful (-i). */ int ignore_errors_flag = 0; /* Nonzero means print the data base that results from reading the makefile. (-p or --print-data-base). */ int print_data_base_flag = 0; /* Nonzero means don't remake anything, just print a list of targets defined by reading the makefile (--print-targets). */ int print_targets_flag = 0; /* Nonzero means don't remake anything; just return a nonzero status if the specified targets are not up to date (-q). */ int question_flag = 0; /* Nonzero means do not use any of the builtin rules (-r) / variables (-R). */ int no_builtin_rules_flag = 0; int no_builtin_variables_flag = 0; static int old_builtin_rules_flag; static int old_builtin_variables_flag; /* Nonzero means all variables are automatically exported. */ int export_all_variables = 0; /* Nonzero means keep going even if remaking some file fails (-k). */ int keep_going_flag; static const int default_keep_going_flag = 0; static enum variable_origin keep_going_origin = o_default; /* Nonzero means check symlink mtimes. */ int check_symlink_flag = 0; static int print_directory_flag = -1; static const int default_print_directory_flag = -1; static enum variable_origin print_directory_origin = o_default; /* Nonzero means print version information. */ int print_version_flag = 0; /* List of makefiles given with -f switches. */ static struct stringlist *makefiles = 0; /* Size of the stack when we started. */ #ifdef SET_STACK_SIZE struct rlimit stack_limit; #endif /* Number of job slots for parallelism. */ unsigned int job_slots; #define INVALID_JOB_SLOTS (-1) static unsigned int master_job_slots = 0; static int arg_job_slots = INVALID_JOB_SLOTS; static const int default_job_slots = INVALID_JOB_SLOTS; /* Value of job_slots that means no limit. */ static const int inf_jobs = 0; /* Authorization for the jobserver. */ char *jobserver_auth = NULL; /* Style for the jobserver. */ static char *jobserver_style = NULL; /* Shuffle mode for goals and prerequisites. */ static char *shuffle_mode = NULL; /* Handle for the mutex to synchronize output of our children under -O. */ static char *sync_mutex = NULL; /* Maximum load average at which multiple jobs will be run. Negative values mean unlimited, while zero means limit to zero load (which could be useful to start infinite jobs remotely but one at a time locally). */ double max_load_average = -1.0; double default_load_average = -1.0; /* List of directories given with -C switches. */ static struct stringlist *directories = 0; /* List of include directories given with -I switches. */ static struct stringlist *include_dirs = 0; /* List of files given with -o switches. */ static struct stringlist *old_files = 0; /* List of files given with -W switches. */ static struct stringlist *new_files = 0; /* List of strings to be eval'd. */ static struct stringlist *eval_strings = 0; /* If nonzero, we should just print usage and exit. */ static int print_usage_flag = 0; /* Command line warning flags. */ static struct stringlist *warn_flags = 0; /* If nonzero, we should print a warning message for each reference to an undefined variable. */ static int warn_undefined_variables_flag; /* If nonzero, always build all targets, regardless of whether they appear out of date or not. */ static int always_make_set = 0; int always_make_flag = 0; /* If nonzero, we're in the "try to rebuild makefiles" phase. */ int rebuilding_makefiles = 0; /* Remember the original value of the SHELL variable, from the environment. */ struct variable shell_var; /* This character introduces a command: it's the first char on the line. */ char cmd_prefix = '\t'; /* Whether or not .NOTINTERMEDIATE with no prerequisites was given. */ unsigned int no_intermediates; /* Count the number of commands we've invoked, that might change something in the filesystem. Start with 1 so calloc'd memory never matches. */ unsigned long command_count = 1; /* Remember the location of the name of the batch file from stdin. */ static int stdin_offset = -1; /* The usage output. We write it this way to make life easier for the translators, especially those trying to translate to right-to-left languages like Hebrew. */ static const char *const usage[] = { N_("Options:\n"), N_("\ -b, -m Ignored for compatibility.\n"), N_("\ -B, --always-make Unconditionally make all targets.\n"), N_("\ -C DIRECTORY, --directory=DIRECTORY\n\ Change to DIRECTORY before doing anything.\n"), N_("\ -d Print lots of debugging information.\n"), N_("\ --debug[=FLAGS] Print various types of debugging information.\n"), N_("\ -e, --environment-overrides\n\ Environment variables override makefiles.\n"), N_("\ -E STRING, --eval=STRING Evaluate STRING as a makefile statement.\n"), N_("\ -f FILE, --file=FILE, --makefile=FILE\n\ Read FILE as a makefile.\n"), N_("\ -h, --help Print this message and exit.\n"), N_("\ -i, --ignore-errors Ignore errors from recipes.\n"), N_("\ -I DIRECTORY, --include-dir=DIRECTORY\n\ Search DIRECTORY for included makefiles.\n"), N_("\ -j [N], --jobs[=N] Allow N jobs at once; infinite jobs with no arg.\n"), N_("\ --jobserver-style=STYLE Select the style of jobserver to use.\n"), N_("\ -k, --keep-going Keep going when some targets can't be made.\n"), N_("\ -l [N], --load-average[=N], --max-load[=N]\n\ Don't start multiple jobs unless load is below N.\n"), N_("\ -L, --check-symlink-times Use the latest mtime between symlinks and target.\n"), N_("\ -n, --just-print, --dry-run, --recon\n\ Don't actually run any recipe; just print them.\n"), N_("\ -o FILE, --old-file=FILE, --assume-old=FILE\n\ Consider FILE to be very old and don't remake it.\n"), N_("\ -O[TYPE], --output-sync[=TYPE]\n\ Synchronize output of parallel jobs by TYPE.\n"), N_("\ -p, --print-data-base Print make's internal database.\n"), N_("\ -q, --question Run no recipe; exit status says if up to date.\n"), N_("\ -r, --no-builtin-rules Disable the built-in implicit rules.\n"), N_("\ -R, --no-builtin-variables Disable the built-in variable settings.\n"), N_("\ --shuffle[={SEED|random|reverse|none}]\n\ Perform shuffle of prerequisites and goals.\n"), N_("\ -s, --silent, --quiet Don't echo recipes.\n"), N_("\ --no-silent Echo recipes (disable --silent mode).\n"), N_("\ -S, --no-keep-going, --stop\n\ Turns off -k.\n"), N_("\ -t, --touch Touch targets instead of remaking them.\n"), N_("\ --trace Print tracing information.\n"), N_("\ -v, --version Print the version number of make and exit.\n"), N_("\ -w, --print-directory Print the current directory.\n"), N_("\ --no-print-directory Turn off -w, even if it was turned on implicitly.\n"), N_("\ -W FILE, --what-if=FILE, --new-file=FILE, --assume-new=FILE\n\ Consider FILE to be infinitely new.\n"), N_("\ --warn[=CONTROL] Control warnings for makefile issues.\n"), NULL }; /* Nonzero if the "--trace" option was given. */ static int trace_flag = 0; /* The structure that describes an accepted command switch. */ struct command_switch { int c; /* The switch character. */ enum /* Type of the value. */ { flag, /* Turn int flag on. */ flag_off, /* Turn int flag off. */ string, /* One string per invocation. */ strlist, /* One string per switch. */ filename, /* A string containing a file name. */ positive_int, /* A positive integer. */ floating, /* A floating-point number (double). */ ignore /* Ignored. */ } type; void *value_ptr; /* Pointer to the value-holding variable. */ unsigned int env:1; /* Can come from MAKEFLAGS. */ unsigned int toenv:1; /* Should be put in MAKEFLAGS. */ unsigned int no_makefile:1; /* Don't propagate when remaking makefiles. */ unsigned int specified:1; /* Set if the switch was specified somewhere. Allows switches that are ON by default to appear in MAKEFLAGS when set explicitly. */ const void *noarg_value; /* Pointer to value used if no arg given. */ const void *default_value; /* Pointer to default value. */ const char *long_name; /* Long option name. */ enum variable_origin *origin; /* Origin of the value. */ }; /* The table of command switches. Order matters here: this is the order MAKEFLAGS will be constructed. So be sure all simple flags (single char, no argument) come first. */ #define TEMP_STDIN_OPT (CHAR_MAX+10) #define WARN_OPT (CHAR_MAX+13) static struct command_switch switches[] = { { 'b', ignore, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 'B', flag, &always_make_set, 1, 1, 0, 0, 0, 0, "always-make", 0 }, { 'd', flag, &debug_flag, 1, 1, 0, 0, 0, 0, 0, 0 }, { 'e', flag, &env_overrides, 1, 1, 0, 0, 0, 0, "environment-overrides", 0 }, { 'E', strlist, &eval_strings, 1, 0, 0, 0, 0, 0, "eval", 0 }, { 'h', flag, &print_usage_flag, 0, 0, 0, 0, 0, 0, "help", 0 }, { 'i', flag, &ignore_errors_flag, 1, 1, 0, 0, 0, 0, "ignore-errors", 0 }, { 'k', flag, &keep_going_flag, 1, 1, 0, 0, 0, &default_keep_going_flag, "keep-going", &keep_going_origin }, { 'L', flag, &check_symlink_flag, 1, 1, 0, 0, 0, 0, "check-symlink-times", 0 }, { 'm', ignore, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 'n', flag, &just_print_flag, 1, 1, 1, 0, 0, 0, "just-print", 0 }, { 'p', flag, &print_data_base_flag, 1, 1, 0, 0, 0, 0, "print-data-base", 0 }, { 'q', flag, &question_flag, 1, 1, 1, 0, 0, 0, "question", 0 }, { 'r', flag, &no_builtin_rules_flag, 1, 1, 0, 0, 0, 0, "no-builtin-rules", 0 }, { 'R', flag, &no_builtin_variables_flag, 1, 1, 0, 0, 0, 0, "no-builtin-variables", 0 }, { 's', flag, &silent_flag, 1, 1, 0, 0, 0, &default_silent_flag, "silent", &silent_origin }, { 'S', flag_off, &keep_going_flag, 1, 1, 0, 0, 0, &default_keep_going_flag, "no-keep-going", &keep_going_origin }, { 't', flag, &touch_flag, 1, 1, 1, 0, 0, 0, "touch", 0 }, { 'v', flag, &print_version_flag, 1, 0, 0, 0, 0, 0, "version", 0 }, { 'w', flag, &print_directory_flag, 1, 1, 0, 0, 0, &default_print_directory_flag, "print-directory", &print_directory_origin }, /* These options take arguments. */ { 'C', filename, &directories, 0, 0, 0, 0, 0, 0, "directory", 0 }, { 'f', filename, &makefiles, 0, 0, 0, 0, 0, 0, "file", 0 }, { 'I', filename, &include_dirs, 1, 1, 0, 0, 0, 0, "include-dir", 0 }, { 'j', positive_int, &arg_job_slots, 1, 1, 0, 0, &inf_jobs, &default_job_slots, "jobs", 0 }, { 'l', floating, &max_load_average, 1, 1, 0, 0, &default_load_average, &default_load_average, "load-average", 0 }, { 'o', filename, &old_files, 0, 0, 0, 0, 0, 0, "old-file", 0 }, { 'O', string, &output_sync_option, 1, 1, 0, 0, "target", 0, "output-sync", 0 }, { 'W', filename, &new_files, 0, 0, 0, 0, 0, 0, "what-if", 0 }, /* These are long-style options. */ { CHAR_MAX+1, strlist, &db_flags, 1, 1, 0, 0, "basic", 0, "debug", 0 }, { CHAR_MAX+2, string, &jobserver_auth, 1, 1, 0, 0, 0, 0, JOBSERVER_AUTH_OPT, 0 }, { CHAR_MAX+3, flag, &trace_flag, 1, 1, 0, 0, 0, 0, "trace", 0 }, { CHAR_MAX+4, flag_off, &print_directory_flag, 1, 1, 0, 0, 0, &default_print_directory_flag, "no-print-directory", &print_directory_origin }, { CHAR_MAX+5, flag, &warn_undefined_variables_flag, 1, 1, 0, 0, 0, 0, "warn-undefined-variables", 0 }, { CHAR_MAX+7, string, &sync_mutex, 1, 1, 0, 0, 0, 0, "sync-mutex", 0 }, { CHAR_MAX+8, flag_off, &silent_flag, 1, 1, 0, 0, 0, &default_silent_flag, "no-silent", &silent_origin }, { CHAR_MAX+9, string, &jobserver_auth, 1, 0, 0, 0, 0, 0, "jobserver-fds", 0 }, /* There is special-case handling for this in decode_switches() as well. */ { TEMP_STDIN_OPT, filename, &makefiles, 0, 0, 0, 0, 0, 0, "temp-stdin", 0 }, { CHAR_MAX+11, string, &shuffle_mode, 1, 1, 0, 0, "random", 0, "shuffle", 0 }, { CHAR_MAX+12, string, &jobserver_style, 1, 0, 0, 0, 0, 0, "jobserver-style", 0 }, { WARN_OPT, strlist, &warn_flags, 1, 1, 0, 0, "warn", NULL, "warn", NULL }, { CHAR_MAX+14, flag, &print_targets_flag, 1, 1, 0, 0, 0, 0, "print-targets", 0 }, { 0, 0, NULL, 0, 0, 0, 0, NULL, NULL, NULL, NULL } }; /* Secondary long names for options. */ static struct option long_option_aliases[] = { { "quiet", no_argument, 0, 's' }, { "stop", no_argument, 0, 'S' }, { "new-file", required_argument, 0, 'W' }, { "assume-new", required_argument, 0, 'W' }, { "assume-old", required_argument, 0, 'o' }, { "max-load", optional_argument, 0, 'l' }, { "dry-run", no_argument, 0, 'n' }, { "recon", no_argument, 0, 'n' }, { "makefile", required_argument, 0, 'f' }, }; /* List of goal targets. */ static struct goaldep *goals, *lastgoal; /* List of variables which were defined on the command line (or, equivalently, in MAKEFLAGS). */ struct command_variable { struct command_variable *next; struct variable *variable; }; static struct command_variable *command_variables; /* The name we were invoked with. */ const char *program; /* Our current directory before processing any -C options. */ char *directory_before_chdir; /* Our current directory after processing all -C options. */ char *starting_directory; /* Value of the MAKELEVEL variable at startup (or 0). */ unsigned int makelevel; /* Pointer to the value of the .DEFAULT_GOAL special variable. The value will be the name of the goal to remake if the command line does not override it. It can be set by the makefile, or else it's the first target defined in the makefile whose name does not start with '.'. */ struct variable * default_goal_var; /* Pointer to structure for the file .DEFAULT whose commands are used for any file that has none of its own. This is zero if the makefiles do not define .DEFAULT. */ struct file *default_file; /* Nonzero if we have seen the magic '.POSIX' target. This turns on pedantic compliance with POSIX.2. */ int posix_pedantic; /* Nonzero if we have seen the '.SECONDEXPANSION' target. This turns on secondary expansion of prerequisites. */ int second_expansion; /* Nonzero if we have seen the '.ONESHELL' target. This causes the entire recipe to be handed to SHELL as a single string, potentially containing newlines. */ int one_shell; /* One of OUTPUT_SYNC_* if the "--output-sync" option was given. This attempts to synchronize the output of parallel jobs such that the results of each job stay together. */ int output_sync = OUTPUT_SYNC_NONE; /* Nonzero if we have seen the '.NOTPARALLEL' target. This turns off parallel builds for this invocation of make. */ int not_parallel; /* Nonzero if some rule detected clock skew; we keep track so (a) we only print one warning about it during the run, and (b) we can print a final warning at the end of the run. */ int clock_skew_detected; /* Map of possible stop characters for searching strings. */ #ifndef UCHAR_MAX # define UCHAR_MAX 255 #endif unsigned short stopchar_map[UCHAR_MAX + 1] = {0}; /* If output-sync is enabled we'll collect all the output generated due to options, while reading makefiles, etc. */ struct output make_sync; /* Mask of signals that are being caught with fatal_error_signal. */ #if defined(POSIX) sigset_t fatal_signal_set; #elif defined(HAVE_SIGSETMASK) int fatal_signal_mask; #endif #if !HAVE_DECL_BSD_SIGNAL && !defined bsd_signal # if !defined HAVE_SIGACTION # define bsd_signal signal # else typedef void (*bsd_signal_ret_t) (int); static bsd_signal_ret_t bsd_signal (int sig, bsd_signal_ret_t func) { struct sigaction act, oact; act.sa_handler = func; act.sa_flags = SA_RESTART; sigemptyset (&act.sa_mask); sigaddset (&act.sa_mask, sig); if (sigaction (sig, &act, &oact) != 0) return SIG_ERR; return oact.sa_handler; } # endif #endif static void initialize_global_hash_tables (void) { init_hash_global_variable_set (); strcache_init (); init_hash_files (); hash_init_directories (); hash_init_function_table (); } /* This character map locate stop chars when parsing GNU makefiles. Each element is true if we should stop parsing on that character. */ static void initialize_stopchar_map (void) { int i; stopchar_map[(int)'\0'] = MAP_NUL; stopchar_map[(int)'#'] = MAP_COMMENT; stopchar_map[(int)';'] = MAP_SEMI; stopchar_map[(int)'='] = MAP_EQUALS; stopchar_map[(int)':'] = MAP_COLON; stopchar_map[(int)'|'] = MAP_PIPE; stopchar_map[(int)'.'] = MAP_DOT | MAP_USERFUNC; stopchar_map[(int)','] = MAP_COMMA; stopchar_map[(int)'('] = MAP_VARSEP; stopchar_map[(int)'{'] = MAP_VARSEP; stopchar_map[(int)'}'] = MAP_VARSEP; stopchar_map[(int)')'] = MAP_VARSEP; stopchar_map[(int)'$'] = MAP_VARIABLE; stopchar_map[(int)'-'] = MAP_USERFUNC; stopchar_map[(int)'_'] = MAP_USERFUNC; stopchar_map[(int)' '] = MAP_BLANK; stopchar_map[(int)'\t'] = MAP_BLANK; stopchar_map[(int)'/'] = MAP_DIRSEP; #if MK_OS_VMS stopchar_map[(int)':'] |= MAP_DIRSEP; stopchar_map[(int)']'] |= MAP_DIRSEP; stopchar_map[(int)'>'] |= MAP_DIRSEP; #elif defined(HAVE_DOS_PATHS) stopchar_map[(int)'\\'] |= MAP_DIRSEP; #endif for (i = 1; i <= UCHAR_MAX; ++i) { if (isspace (i) && NONE_SET (stopchar_map[i], MAP_BLANK)) /* Don't mark blank characters as newline characters. */ stopchar_map[i] |= MAP_NEWLINE; else if (isalnum (i)) stopchar_map[i] |= MAP_USERFUNC; } } /* This code is stolen from gnulib. If/when we abandon the requirement to work with K&R compilers, we can remove this (and perhaps other parts of GNU Make!) and migrate to using gnulib directly. This is called only through atexit(), which means die() has already been invoked. So, call exit() here directly. Apparently that works...? */ /* Close standard output, exiting with status 'exit_failure' on failure. If a program writes *anything* to stdout, that program should close stdout and make sure that it succeeds before exiting. Otherwise, suppose that you go to the extreme of checking the return status of every function that does an explicit write to stdout. The last printf can succeed in writing to the internal stream buffer, and yet the fclose(stdout) could still fail (due e.g., to a disk full error) when it tries to write out that buffered data. Thus, you would be left with an incomplete output file and the offending program would exit successfully. Even calling fflush is not always sufficient, since some file systems (NFS and CODA) buffer written/flushed data until an actual close call. Besides, it's wasteful to check the return value from every call that writes to stdout -- just let the internal stream state record the failure. That's what the ferror test is checking below. It's important to detect such failures and exit nonzero because many tools (most notably 'make' and other build-management systems) depend on being able to detect failure in other tools via their exit status. */ static void close_stdout (void) { int prev_fail = ferror (stdout); int fclose_fail = fclose (stdout); if (prev_fail || fclose_fail) { if (fclose_fail) perror_with_name (_("write error: stdout"), ""); else O (error, NILF, _("write error: stdout")); exit (MAKE_TROUBLE); } } static const char * expand_command_line_file (const char *name) { const char *cp; char *expanded = 0; if (name[0] == '\0') O (fatal, NILF, _("empty string invalid as file name")); if (name[0] == '~') { expanded = tilde_expand (name); if (expanded && expanded[0] != '\0') name = expanded; } /* This is also done in parse_file_seq, so this is redundant for names read from makefiles. It is here for names passed on the command line. */ while (name[0] == '.' && name[1] == '/') { name += 2; while (name[0] == '/') /* Skip following slashes: ".//foo" is "foo", not "/foo". */ ++name; } if (name[0] == '\0') { /* Nothing else but one or more "./", maybe plus slashes! */ name = "./"; } cp = strcache_add (name); free (expanded); return cp; } /* Toggle -d on receipt of SIGUSR1. */ #ifdef SIGUSR1 static void debug_signal_handler (int sig UNUSED) { db_level = db_level ? DB_NONE : DB_BASIC; } #endif static void decode_debug_flags (void) { const char **pp; if (debug_flag) db_level = DB_ALL; if (trace_flag) db_level |= DB_PRINT | DB_WHY; if (db_flags) for (pp=db_flags->list; *pp; ++pp) { const char *p = *pp; while (1) { switch (tolower (p[0])) { case 'a': db_level |= DB_ALL; break; case 'b': db_level |= DB_BASIC; break; case 'i': db_level |= DB_BASIC | DB_IMPLICIT; break; case 'j': db_level |= DB_JOBS; break; case 'm': db_level |= DB_BASIC | DB_MAKEFILES; break; case 'n': db_level = 0; break; case 'p': db_level |= DB_PRINT; break; case 'v': db_level |= DB_BASIC | DB_VERBOSE; break; case 'w': db_level |= DB_WHY; break; default: OS (fatal, NILF, _("unknown debug level specification '%s'"), p); } while (*(++p) != '\0') if (*p == ',' || *p == ' ') { ++p; break; } if (*p == '\0') break; } } if (db_level) verify_flag = 1; if (! db_level) debug_flag = 0; } static void decode_output_sync_flags (void) { #ifdef NO_OUTPUT_SYNC output_sync = OUTPUT_SYNC_NONE; #else if (output_sync_option) { if (streq (output_sync_option, "none")) output_sync = OUTPUT_SYNC_NONE; else if (streq (output_sync_option, "line")) output_sync = OUTPUT_SYNC_LINE; else if (streq (output_sync_option, "target")) output_sync = OUTPUT_SYNC_TARGET; else if (streq (output_sync_option, "recurse")) output_sync = OUTPUT_SYNC_RECURSE; else OS (fatal, NILF, _("unknown output-sync type '%s'"), output_sync_option); } if (sync_mutex) osync_parse_mutex (sync_mutex); #endif } /* Print a nice usage method and exit. */ static void NORETURN print_usage (int bad) { const char *const *cpp; FILE *usageto; if (print_version_flag) { print_version (); fputs ("\n", stdout); } usageto = bad ? stderr : stdout; fprintf (usageto, _("Usage: %s [options] [target] ...\n"), program); for (cpp = usage; *cpp; ++cpp) fputs (_(*cpp), usageto); if (!remote_description || *remote_description == '\0') fprintf (usageto, _("\nThis program built for %s\n"), make_host); else fprintf (usageto, _("\nThis program built for %s (%s)\n"), make_host, remote_description); fprintf (usageto, _("Report bugs to <bug-make@gnu.org>\n")); die (bad ? MAKE_FAILURE : MAKE_SUCCESS); } #if MK_OS_W32 /* * HANDLE runtime exceptions by avoiding a requestor on the GUI. Capture * exception and print it to stderr instead. * * If ! DB_VERBOSE, just print a simple message and exit. * If DB_VERBOSE, print a more verbose message. * If compiled for DEBUG, let exception pass through to GUI so that * debuggers can attach. */ LONG WINAPI handle_runtime_exceptions (struct _EXCEPTION_POINTERS *exinfo) { PEXCEPTION_RECORD exrec = exinfo->ExceptionRecord; LPSTR cmdline = GetCommandLine (); LPSTR prg = strtok (cmdline, " "); CHAR errmsg[1024]; #ifdef USE_EVENT_LOG HANDLE hEventSource; LPTSTR lpszStrings[1]; #endif if (! ISDB (DB_VERBOSE)) { sprintf (errmsg, _("%s: Interrupt/Exception caught (code = 0x%lx, addr = 0x%p)\n"), prg, exrec->ExceptionCode, exrec->ExceptionAddress); fputs (errmsg, stderr); exit (255); } sprintf (errmsg, _("\nUnhandled exception filter called from program %s\nExceptionCode = %lx\nExceptionFlags = %lx\nExceptionAddress = 0x%p\n"), prg, exrec->ExceptionCode, exrec->ExceptionFlags, exrec->ExceptionAddress); if (exrec->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && exrec->NumberParameters >= 2) sprintf (&errmsg[strlen(errmsg)], (exrec->ExceptionInformation[0] ? _("Access violation: write operation at address 0x%p\n") : _("Access violation: read operation at address 0x%p\n")), (PVOID)exrec->ExceptionInformation[1]); /* turn this on if we want to put stuff in the event log too */ #ifdef USE_EVENT_LOG hEventSource = RegisterEventSource (NULL, "GNU Make"); lpszStrings[0] = errmsg; if (hEventSource != NULL) { ReportEvent (hEventSource, /* handle of event source */ EVENTLOG_ERROR_TYPE, /* event type */ 0, /* event category */ 0, /* event ID */ NULL, /* current user's SID */ 1, /* strings in lpszStrings */ 0, /* no bytes of raw data */ lpszStrings, /* array of error strings */ NULL); /* no raw data */ (VOID) DeregisterEventSource (hEventSource); } #endif /* Write the error to stderr too */ fputs (errmsg, stderr); #ifdef DEBUG return EXCEPTION_CONTINUE_SEARCH; #else exit (255); return (255); /* not reached */ #endif } /* * On W32 systems we don't have the luxury of a /bin directory that * is mapped globally to every drive mounted to the system. Since make could * be invoked from any drive, and we don't want to propagate /bin/sh * to every single drive. Allow ourselves a chance to search for * a value for default shell here (if the default path does not exist). */ int find_and_set_default_shell (const char *token) { int sh_found = 0; char *atoken = 0; const char *search_token; const char *tokend; extern const char *default_shell; if (!token) search_token = default_shell; else search_token = atoken = xstrdup (token); /* If the user explicitly requests the DOS cmd shell, obey that request. However, make sure that's what they really want by requiring the value of SHELL either equal, or have a final path element of, "cmd" or "cmd.exe" case-insensitive. */ tokend = search_token + strlen (search_token) - 3; if (((tokend == search_token || (tokend > search_token && ISDIRSEP (tokend[-1]))) && !strcasecmp (tokend, "cmd")) || ((tokend - 4 == search_token || (tokend - 4 > search_token && ISDIRSEP (tokend[-5]))) && !strcasecmp (tokend - 4, "cmd.exe"))) { batch_mode_shell = 1; unixy_shell = 0; default_shell = xstrdup (w32ify (search_token, 0)); DB (DB_VERBOSE, (_("find_and_set_shell() setting default_shell = %s\n"), default_shell)); sh_found = 1; } else if (!no_default_sh_exe && (token == NULL || !strcmp (search_token, default_shell))) { /* no new information, path already set or known */ sh_found = 1; } else if (_access (search_token, 0) == 0) { /* search token path was found */ default_shell = xstrdup (w32ify (search_token, 0)); DB (DB_VERBOSE, (_("find_and_set_shell() setting default_shell = %s\n"), default_shell)); sh_found = 1; } else { char *p; struct variable *v = lookup_variable (STRING_SIZE_TUPLE ("PATH")); /* Search Path for shell */ if (v && v->value) { char *ep; p = v->value; ep = strchr (p, PATH_SEPARATOR_CHAR); while (ep && *ep) { int sh_pathlen; PATH_VAR (sh_path); *ep = '\0'; sh_pathlen = snprintf (sh_path, GET_PATH_MAX, "%s/%s", p, search_token); if (0 <= sh_pathlen && sh_pathlen < GET_PATH_MAX && _access (sh_path, 0) == 0) { default_shell = xstrdup (w32ify (sh_path, 0)); sh_found = 1; *ep = PATH_SEPARATOR_CHAR; /* terminate loop */ p += strlen (p); } else { *ep = PATH_SEPARATOR_CHAR; p = ++ep; } ep = strchr (p, PATH_SEPARATOR_CHAR); } /* be sure to check last element of Path */ if (p && *p) { int sh_pathlen; PATH_VAR (sh_path); sh_pathlen = snprintf (sh_path, GET_PATH_MAX, "%s/%s", p, search_token); if (0 <= sh_pathlen && sh_pathlen < GET_PATH_MAX && _access (sh_path, 0) == 0) { default_shell = xstrdup (w32ify (sh_path, 0)); sh_found = 1; } } if (sh_found) DB (DB_VERBOSE, (_("find_and_set_shell() path search set default_shell = %s\n"), default_shell)); } } /* naive test */ if (!unixy_shell && sh_found && (strstr (default_shell, "sh") || strstr (default_shell, "SH"))) { unixy_shell = 1; batch_mode_shell = 0; } #ifdef BATCH_MODE_ONLY_SHELL batch_mode_shell = 1; #endif free (atoken); return (sh_found); } #endif /* MK_OS_W32 */ #if MK_OS_DOS static void msdos_return_to_initial_directory (void) { if (directory_before_chdir) chdir (directory_before_chdir); } #endif /* MK_OS_DOS */ static void reset_jobserver (void) { jobserver_clear (); free (jobserver_auth); jobserver_auth = NULL; } void temp_stdin_unlink () { /* This function is called from a signal handler. Keep async-signal-safe. If there is a temp file from reading from stdin, get rid of it. */ if (stdin_offset >= 0) { const char *nm = makefiles->list[stdin_offset]; int r = 0; stdin_offset = -1; EINTRLOOP(r, unlink (nm)); if (r < 0 && errno != ENOENT && !handling_fatal_signal) perror_with_name (_("unlink (temporary file): "), nm); } } #ifdef MK_OS_ZOS extern char **environ; #endif #if defined(MK_OS_ZOS) int main (int argc, char **argv) #else int main (int argc, char **argv, char **envp) #endif { int makefile_status = MAKE_SUCCESS; struct goaldep *read_files; PATH_VAR (current_directory); unsigned int restarts = 0; unsigned int syncing = 0; int argv_slots; /* The jobslot info we got from our parent process. */ #if MK_OS_W32 const char *unix_path = NULL; const char *windows32_path = NULL; SetUnhandledExceptionFilter (handle_runtime_exceptions); /* start off assuming we have no shell */ unixy_shell = 0; no_default_sh_exe = 1; #endif initialize_variable_output (); /* Useful for attaching debuggers, etc. */ SPIN ("main-entry"); #ifdef HAVE_ATEXIT if (ANY_SET (check_io_state (), IO_STDOUT_OK)) atexit (close_stdout); #endif output_init (&make_sync); initialize_stopchar_map (); warn_init (); #ifdef SET_STACK_SIZE /* Get rid of any avoidable limit on stack size. */ { struct rlimit rlim; /* Set the stack limit huge so that alloca does not fail. */ if (getrlimit (RLIMIT_STACK, &rlim) == 0 && rlim.rlim_cur > 0 && rlim.rlim_cur < rlim.rlim_max) { stack_limit = rlim; rlim.rlim_cur = rlim.rlim_max; setrlimit (RLIMIT_STACK, &rlim); } else stack_limit.rlim_cur = 0; } #endif /* Needed for OS/2 */ initialize_main (&argc, &argv); #ifdef MAKE_MAINTAINER_MODE /* In maintainer mode we always enable verification. */ verify_flag = 1; #endif #if MK_OS_DOS && !defined (_POSIX_SOURCE) /* Request the most powerful version of 'system', to make up for the dumb default shell. */ __system_flags = (__system_redirect | __system_use_shell | __system_allow_multiple_cmds | __system_allow_long_cmds | __system_handle_null_commands | __system_emulate_chdir); #endif /* Set up gettext/internationalization support. */ setlocale (LC_ALL, ""); /* The cast to void shuts up compiler warnings on systems that disable NLS. */ (void)bindtextdomain (PACKAGE, LOCALEDIR); (void)textdomain (PACKAGE); #ifdef POSIX sigemptyset (&fatal_signal_set); #define ADD_SIG(sig) sigaddset (&fatal_signal_set, sig) #else #ifdef HAVE_SIGSETMASK fatal_signal_mask = 0; #define ADD_SIG(sig) fatal_signal_mask |= sigmask (sig) #else #define ADD_SIG(sig) (void)sig #endif #endif #define FATAL_SIG(sig) \ if (bsd_signal (sig, fatal_error_signal) == SIG_IGN) \ bsd_signal (sig, SIG_IGN); \ else \ ADD_SIG (sig); #ifdef SIGHUP FATAL_SIG (SIGHUP); #endif #ifdef SIGQUIT FATAL_SIG (SIGQUIT); #endif #ifdef SIGPIPE FATAL_SIG (SIGPIPE); #endif FATAL_SIG (SIGINT); FATAL_SIG (SIGTERM); #if MK_OS_DOS /* Windows 9X delivers FP exceptions in child programs to their parent! We don't want Make to die when a child divides by zero, so we work around that lossage by catching SIGFPE. */ FATAL_SIG (SIGFPE); #endif #ifdef SIGDANGER FATAL_SIG (SIGDANGER); #endif #ifdef SIGXCPU FATAL_SIG (SIGXCPU); #endif #ifdef SIGXFSZ FATAL_SIG (SIGXFSZ); #endif #undef FATAL_SIG /* Do not ignore the child-death signal. This must be done before any children could possibly be created; otherwise, the wait functions won't work on systems with the SVR4 ECHILD brain damage, if our invoker is ignoring this signal. */ #ifdef HAVE_WAIT_NOHANG # if defined SIGCHLD (void) bsd_signal (SIGCHLD, SIG_DFL); # endif # if defined SIGCLD && SIGCLD != SIGCHLD (void) bsd_signal (SIGCLD, SIG_DFL); # endif #endif output_init (NULL); /* Figure out where this program lives. */ if (argv[0] == 0) argv[0] = (char *)""; if (argv[0][0] == '\0') program = "make"; else { #if defined(HAVE_DOS_PATHS) const char* start = argv[0]; /* Skip an initial drive specifier if present. */ if (isalpha ((unsigned char)start[0]) && start[1] == ':') start += 2; if (start[0] == '\0') program = "make"; else { program = start + strlen (start); while (program > start && ! ISDIRSEP (program[-1])) --program; /* Remove the .exe extension if present. */ { size_t len = strlen (program); if (len > 4 && streq (&program[len - 4], ".exe")) program = xstrndup (program, len - 4); } } #elif MK_OS_VMS set_program_name (argv[0]); program = program_name; { const char *shell; char pwdbuf[256]; char *pwd; shell = getenv ("SHELL"); if (shell != NULL) vms_gnv_shell = 1; /* Need to know if CRTL set to report UNIX paths. Use getcwd as it works on all versions of VMS. */ pwd = getcwd(pwdbuf, 256); if (pwd[0] == '/') vms_report_unix_paths = 1; vms_use_mcr_command = get_vms_env_flag ("GNV$MAKE_USE_MCR", 0); vms_always_use_cmd_file = get_vms_env_flag ("GNV$MAKE_USE_CMD_FILE", 0); /* Legacy behavior is on VMS is older behavior that needed to be changed to be compatible with standard make behavior. For now only completely disable when running under a Bash shell. TODO: Update VMS built in recipes and macros to not need this behavior, at which time the default may change. */ vms_legacy_behavior = get_vms_env_flag ("GNV$MAKE_OLD_VMS", !vms_gnv_shell); /* VMS was changed to use a comma separator in the past, but that is incompatible with built in functions that expect space separated lists. Allow this to be selectively turned off. */ vms_comma_separator = get_vms_env_flag ("GNV$MAKE_COMMA", vms_legacy_behavior); /* Some Posix shell syntax options are incompatible with VMS syntax. VMS requires double quotes for strings and escapes quotes differently. When this option is active, VMS will try to simulate Posix shell simulations instead of using VMS DCL behavior. */ vms_unix_simulation = get_vms_env_flag ("GNV$MAKE_SHELL_SIM", !vms_legacy_behavior); } if (need_vms_symbol () && !vms_use_mcr_command) create_foreign_command (program_name, argv[0]); #else program = strrchr (argv[0], '/'); if (program == 0) program = argv[0]; else ++program; #endif } initialize_global_hash_tables (); /* Ensure the temp directory is set up: we don't want the first time we use it to be in a forked process. */ get_tmpdir (); /* Figure out where we are. */ #if MK_OS_W32 if (getcwd_fs (current_directory, GET_PATH_MAX) == 0) #else if (getcwd (current_directory, GET_PATH_MAX) == 0) #endif { #ifdef HAVE_GETCWD perror_with_name ("getcwd", ""); #else OS (error, NILF, "getwd: %s", current_directory); #endif current_directory[0] = '\0'; directory_before_chdir = 0; } else directory_before_chdir = xstrdup (current_directory); #if MK_OS_DOS /* Make sure we will return to the initial directory, come what may. */ atexit (msdos_return_to_initial_directory); #endif /* Initialize the special variables. */ define_variable_cname ("MAKEFLAGS", "", o_default, 0)->special = 1; define_variable_cname (".VARIABLES", "", o_default, 0)->special = 1; /* define_variable_cname (".TARGETS", "", o_default, 0)->special = 1; */ define_variable_cname (".RECIPEPREFIX", "", o_default, 0)->special = 1; define_variable_cname (WARNINGS_NAME, "", o_default, 0)->special = 1; define_variable_cname (".SHELLFLAGS", "-c", o_default, 0); define_variable_cname (".LOADED", "", o_default, 0); /* Set up .FEATURES Use a separate variable because define_variable_cname() is a macro and some compilers (MSVC) don't like conditionals in macros. */ { const char *features = "target-specific order-only second-expansion" " else-if shortest-stem undefine oneshell nocomment" " grouped-target extra-prereqs notintermediate" " shell-export" #ifndef NO_ARCHIVES " archives" #endif #ifdef MAKE_JOBSERVER " jobserver" # if JOBSERVER_USE_FIFO " jobserver-fifo" # endif #endif #ifndef NO_OUTPUT_SYNC " output-sync" #endif #ifdef MAKE_SYMLINKS " check-symlink" #endif #ifdef HAVE_GUILE " guile" #endif #ifdef MAKE_LOAD " load" #endif #ifdef HAVE_DOS_PATHS " dospaths" #endif #ifdef MAKE_MAINTAINER_MODE " maintainer" #endif #if defined(__SANITIZE_ADDRESS__) || defined(__SANITIZE_MEMORY__) " sanitize" #endif ; define_variable_cname (".FEATURES", features, o_default, 0); } /* Configure GNU Guile support */ guile_gmake_setup (NILF); /* Read in variables from the environment. It is important that this be done before $(MAKE) is figured out so its definitions will not be from the environment. */ #ifdef MK_OS_ZOS char **envp = environ; #endif { unsigned int i; for (i = 0; envp[i] != 0; ++i) { struct variable *v; const char *ep = envp[i]; /* By default, export all variables culled from the environment. */ enum variable_export export = v_export; size_t len; while (! STOP_SET (*ep, MAP_EQUALS|MAP_NUL)) ++ep; /* If there's no equals sign it's a malformed environment. Ignore. */ if (*ep == '\0') continue; #if MK_OS_W32 if (!unix_path && strneq (envp[i], "PATH=", 5)) unix_path = ep+1; else if (!strnicmp (envp[i], "Path=", 5)) { if (!windows32_path) windows32_path = ep+1; /* PATH gets defined after the loop exits. */ continue; } #endif /* Length of the variable name, and skip the '='. */ len = ep++ - envp[i]; /* If this is MAKE_RESTARTS, check to see if the "already printed the enter statement" flag is set. */ if (len == 13 && memcmp (envp[i], "MAKE_RESTARTS", CSTRLEN ("MAKE_RESTARTS")) == 0) { if (*ep == '-') { OUTPUT_TRACED (); ++ep; } restarts = make_toui (ep, NULL); export = v_noexport; } v = define_variable (envp[i], len, ep, o_env, 1); /* POSIX says the value of SHELL set in the makefile won't change the value of SHELL given to subprocesses. */ if (streq (v->name, "SHELL")) { #if !MK_OS_DOS export = v_noexport; #endif shell_var.name = xstrdup ("SHELL"); shell_var.length = 5; shell_var.value = xstrdup (ep); } v->export = export; } } #if MK_OS_W32 /* If we didn't find a correctly spelled PATH we define PATH as * either the first misspelled value or an empty string */ if (!unix_path) define_variable_cname ("PATH", windows32_path ? windows32_path : "", o_env, 1)->export = v_export; #endif /* Decode the switches. */ if (lookup_variable (STRING_SIZE_TUPLE (GNUMAKEFLAGS_NAME))) { decode_env_switches (STRING_SIZE_TUPLE (GNUMAKEFLAGS_NAME), o_command); /* Clear GNUMAKEFLAGS to avoid duplication. */ define_variable_cname (GNUMAKEFLAGS_NAME, "", o_env, 0); } /* Set MAKEFLAGS's origin to command line: in submakes MAKEFLAGS will carry command line switches. This causes env variable MAKEFLAGS to beat makefile modifications to MAKEFLAGS. */ decode_env_switches (STRING_SIZE_TUPLE (MAKEFLAGS_NAME), o_command); #if 0 /* People write things like: MFLAGS="CC=gcc -pipe" "CFLAGS=-g" and we set the -p, -i and -e switches. Doesn't seem quite right. */ decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS")); #endif /* In output sync mode we need to sync any output generated by reading the makefiles, such as in $(info ...) or stderr from $(shell ...) etc. */ syncing = make_sync.syncout = (output_sync == OUTPUT_SYNC_LINE || output_sync == OUTPUT_SYNC_TARGET); OUTPUT_SET (&make_sync); /* Parse the command line options. Remember the job slots set this way. */ { int env_slots = arg_job_slots; arg_job_slots = INVALID_JOB_SLOTS; decode_switches (argc, (const char **)argv, o_command); argv_slots = arg_job_slots; if (arg_job_slots == INVALID_JOB_SLOTS) arg_job_slots = env_slots; } if (print_usage_flag) print_usage (0); /* Print version information, and exit. */ if (print_version_flag) { print_version (); die (MAKE_SUCCESS); } /* Now that we know we'll be running, force stdout to be line-buffered. */ #ifdef HAVE_SETVBUF setvbuf (stdout, 0, _IOLBF, BUFSIZ); #elif HAVE_SETLINEBUF setlinebuf (stdout); #endif /* Handle shuffle mode argument. */ if (shuffle_mode) { const char *effective_mode; shuffle_set_mode (shuffle_mode); /* Write fixed seed back to argument list to propagate mode and fixed seed to child $(MAKE) runs. */ free (shuffle_mode); effective_mode = shuffle_get_mode (); if (effective_mode) shuffle_mode = xstrdup (effective_mode); else shuffle_mode = NULL; } /* Set a variable specifying whether stdout/stdin is hooked to a TTY. */ #ifdef HAVE_ISATTY if (isatty (fileno (stdout))) if (! lookup_variable (STRING_SIZE_TUPLE ("MAKE_TERMOUT"))) { const char *tty = TTYNAME (fileno (stdout)); define_variable_cname ("MAKE_TERMOUT", tty ? tty : DEFAULT_TTYNAME, o_default, 0)->export = v_export; } if (isatty (fileno (stderr))) if (! lookup_variable (STRING_SIZE_TUPLE ("MAKE_TERMERR"))) { const char *tty = TTYNAME (fileno (stderr)); define_variable_cname ("MAKE_TERMERR", tty ? tty : DEFAULT_TTYNAME, o_default, 0)->export = v_export; } #endif /* Reset in case the switches changed our minds. */ syncing = (output_sync == OUTPUT_SYNC_LINE || output_sync == OUTPUT_SYNC_TARGET); if (make_sync.syncout && ! syncing) output_close (&make_sync); make_sync.syncout = syncing; OUTPUT_SET (&make_sync); /* Figure out the level of recursion. */ { struct variable *v = lookup_variable (STRING_SIZE_TUPLE (MAKELEVEL_NAME)); if (v && v->value[0] != '\0' && v->value[0] != '-') makelevel = make_toui (v->value, NULL); else makelevel = 0; } /* Set always_make_flag if -B was given and we've not restarted already. */ always_make_flag = always_make_set && (restarts == 0); /* If -R was given, set -r too (doesn't make sense otherwise!) */ if (no_builtin_variables_flag) no_builtin_rules_flag = 1; if (ISDB (DB_BASIC)) { print_version (); /* Flush stdout so the user doesn't have to wait to see the version information while make thinks about things. */ fflush (stdout); } #if !MK_OS_VMS /* Set the "MAKE_COMMAND" variable to the name we were invoked with. (If it is a relative pathname with a slash, prepend our directory name so the result will run the same program regardless of the current dir. If it is a name with no slash, we can only hope that PATH did not find it in the current directory.) */ #if MK_OS_W32 /* * Convert from backslashes to forward slashes for * programs like sh which don't like them. Shouldn't * matter if the path is one way or the other for * CreateProcess(). */ if (strpbrk (argv[0], "/:\\") || strstr (argv[0], "..") || strneq (argv[0], "//", 2)) argv[0] = xstrdup (w32ify (argv[0], 1)); #elif MK_OS_DOS || MK_OS_OS2 if (strchr (argv[0], '\\')) { char *p; argv[0] = xstrdup (argv[0]); for (p = argv[0]; *p; p++) if (*p == '\\') *p = '/'; } /* If argv[0] is not in absolute form, prepend the current directory. This can happen when Make is invoked by another DJGPP program that uses a non-absolute name. */ if (current_directory[0] != '\0' && argv[0] != 0 && (argv[0][0] != '/' && (argv[0][0] == '\0' || argv[0][1] != ':')) # if MK_OS_OS2 /* do not prepend cwd if argv[0] contains no '/', e.g. "make" */ && (strchr (argv[0], '/') != 0 || strchr (argv[0], '\\') != 0) # endif ) argv[0] = xstrdup (concat (3, current_directory, "/", argv[0])); #else /* !MK_OS_DOS */ if (current_directory[0] != '\0' && argv[0] != 0 && argv[0][0] != '/' && strchr (argv[0], '/') != 0 #ifdef HAVE_DOS_PATHS && (argv[0][0] != '\\' && (!argv[0][0] || argv[0][1] != ':')) && strchr (argv[0], '\\') != 0 #endif ) argv[0] = xstrdup (concat (3, current_directory, "/", argv[0])); #endif /* !MK_OS_DOS */ #endif /* MK_OS_W32 */ /* We may move, but until we do, here we are. */ starting_directory = current_directory; /* If there were -C flags, move ourselves about. */ if (directories != 0) { unsigned int i; for (i = 0; directories->list[i] != 0; ++i) { const char *dir = directories->list[i]; #if MK_OS_W32 /* Windows32 chdir() doesn't work if the directory has a trailing '/' But allow -C/ just in case someone wants that. */ { char *p = (char *)dir + strlen (dir) - 1; while (p > dir && ISDIRSEP (p[0])) --p; p[1] = '\0'; } #endif if (chdir (dir) < 0) pfatal_with_name (dir); } } #if MK_OS_W32 /* * THIS BLOCK OF CODE MUST COME AFTER chdir() CALL ABOVE IN ORDER * TO NOT CONFUSE THE DEPENDENCY CHECKING CODE IN implicit.c. * * The functions in dir.c can incorrectly cache information for "." * before we have changed directory and this can cause file * lookups to fail because the current directory (.) was pointing * at the wrong place when it was first evaluated. */ no_default_sh_exe = !find_and_set_default_shell (NULL); #endif /* MK_OS_W32 */ /* If we chdir'ed, figure out where we are now. */ if (directories) { #if MK_OS_W32 if (getcwd_fs (current_directory, GET_PATH_MAX) == 0) #else if (getcwd (current_directory, GET_PATH_MAX) == 0) #endif { #ifdef HAVE_GETCWD perror_with_name ("getcwd", ""); #else OS (error, NILF, "getwd: %s", current_directory); #endif starting_directory = 0; } else starting_directory = current_directory; } define_variable_cname ("CURDIR", current_directory, o_file, 0); /* Construct the list of include directories to search. This will check for existence so it must be done after chdir. */ construct_include_path (include_dirs ? include_dirs->list : NULL); /* Validate the arg_job_slots configuration before we define MAKEFLAGS so users get an accurate value in their makefiles. At this point arg_job_slots is the argv setting, if there is one, else the MAKEFLAGS env setting, if there is one. */ if (jobserver_auth) { /* We're a child in an existing jobserver group. */ if (argv_slots == INVALID_JOB_SLOTS) { /* There's no -j option on the command line: check authorization. */ if (jobserver_parse_auth (jobserver_auth)) /* Success! Use the jobserver. */ goto job_setup_complete; /* Oops: we have jobserver-auth but it's invalid :(. */ O (error, NILF, _("warning: jobserver unavailable: using -j1 (add '+' to parent make rule)")); arg_job_slots = 1; } /* The user provided a -j setting on the command line so use it: we're the master make of a new jobserver group. */ else if (!restarts && argv_slots != 1) ON (error, NILF, _("warning: -j%d forced in submake: resetting jobserver mode"), argv_slots); /* We can't use our parent's jobserver, so reset. */ reset_jobserver (); } job_setup_complete: /* The extra indirection through $(MAKE_COMMAND) is done for hysterical raisins. */ #if MK_OS_VMS if (vms_use_mcr_command) define_variable_cname ("MAKE_COMMAND", vms_command (argv[0]), o_default, 0); else define_variable_cname ("MAKE_COMMAND", program, o_default, 0); #else define_variable_cname ("MAKE_COMMAND", argv[0], o_default, 0); #endif define_variable_cname ("MAKE", "$(MAKE_COMMAND)", o_default, 1); if (command_variables != 0) { struct command_variable *cv; struct variable *v; size_t len = 0; char *value, *p; /* Figure out how much space will be taken up by the command-line variable definitions. */ for (cv = command_variables; cv != 0; cv = cv->next) { v = cv->variable; len += 2 * strlen (v->name); if (! v->recursive) ++len; ++len; len += 2 * strlen (v->value); ++len; } /* Now allocate a buffer big enough and fill it. */ p = value = xmalloc (len); for (cv = command_variables; cv != 0; cv = cv->next) { v = cv->variable; p = quote_for_env (p, v->name); if (! v->recursive) *p++ = ':'; *p++ = '='; p = quote_for_env (p, v->value); *p++ = ' '; } p[-1] = '\0'; /* Kill the final space and terminate. */ /* Define an unchangeable variable with a name that no POSIX.2 makefile could validly use for its own variable. */ define_variable_cname ("-*-command-variables-*-", value, o_automatic, 0); free (value); /* Define the variable; this will not override any user definition. Normally a reference to this variable is written into the value of MAKEFLAGS, allowing the user to override this value to affect the exported value of MAKEFLAGS. In POSIX-pedantic mode, we cannot allow the user's setting of MAKEOVERRIDES to affect MAKEFLAGS, so a reference to this hidden variable is written instead. */ define_variable_cname ("MAKEOVERRIDES", "${-*-command-variables-*-}", o_default, 1); #if MK_OS_VMS vms_export_dcl_symbol ("MAKEOVERRIDES", "${-*-command-variables-*-}"); #endif } /* Read any stdin makefiles into temporary files. */ if (makefiles != 0) { unsigned int i; for (i = 0; i < makefiles->idx; ++i) if (makefiles->list[i][0] == '-' && makefiles->list[i][1] == '\0') { /* This makefile is standard input. Since we may re-exec and thus re-read the makefiles, we read standard input into a temporary file and read from that. */ FILE *outfile; char *newnm; if (stdin_offset >= 0) O (fatal, NILF, _("Makefile from standard input specified twice")); outfile = get_tmpfile (&newnm); if (!outfile) O (fatal, NILF, _("cannot store makefile from stdin to a temporary file")); while (!feof (stdin) && ! ferror (stdin)) { char buf[2048]; size_t n = fread (buf, 1, sizeof (buf), stdin); if (n > 0 && fwrite (buf, 1, n, outfile) != n) OSS (fatal, NILF, _("fwrite: temporary file %s: %s"), newnm, strerror (errno)); } fclose (outfile); /* Replace the name that read_all_makefiles will see with the name of the temporary file. */ makefiles->list[i] = strcache_add (newnm); stdin_offset = i; free (newnm); } } /* Make sure the temporary file is never considered updated. */ if (stdin_offset >= 0) { struct file *f = enter_file (makefiles->list[stdin_offset]); f->updated = 1; f->update_status = us_success; f->command_state = cs_finished; /* Can't be intermediate, or it'll be removed before make re-exec. */ f->intermediate = 0; f->dontcare = 0; /* Avoid re-exec due to stdin temp file timestamps. */ f->last_mtime = f->mtime_before_update = f_mtime (f, 0); } #if !MK_OS_OS2 /* Don't use a SIGCHLD handler for OS/2 */ #if !defined(HAVE_WAIT_NOHANG) || defined(MAKE_JOBSERVER) /* Set up to handle children dying. This must be done before reading in the makefiles so that 'shell' function calls will work. If we don't have a hanging wait we have to fall back to old, broken functionality here and rely on the signal handler and counting children. If we're using the jobs pipe we need a signal handler so that SIGCHLD is not ignored; we need it to interrupt the read(2) of the jobserver pipe if we're waiting for a token. If none of these are true, we don't need a signal handler at all. */ { # if defined SIGCHLD bsd_signal (SIGCHLD, child_handler); # endif # if defined SIGCLD && SIGCLD != SIGCHLD bsd_signal (SIGCLD, child_handler); # endif } #if defined(HAVE_PSELECT) && !defined(MK_OS_ZOS) /* If we have pselect() then we need to block SIGCHLD so it's deferred. */ { sigset_t block; sigemptyset (&block); sigaddset (&block, SIGCHLD); if (sigprocmask (SIG_SETMASK, &block, NULL) < 0) pfatal_with_name ("sigprocmask(SIG_SETMASK, SIGCHLD)"); } #endif #endif #endif /* Let the user send us SIGUSR1 to toggle the -d flag during the run. */ #ifdef SIGUSR1 bsd_signal (SIGUSR1, debug_signal_handler); #endif /* Define the initial list of suffixes for old-style rules. */ set_default_suffixes (); /* Define some internal and special variables. */ define_automatic_variables (); /* Set up the MAKEFLAGS and MFLAGS variables for makefiles to see. Initialize it to be exported but allow the makefile to reset it. */ define_makeflags (0)->export = v_export; /* Define the default variables. */ define_default_variables (); default_file = enter_file (strcache_add (".DEFAULT")); default_goal_var = define_variable_cname (".DEFAULT_GOAL", "", o_file, 0); /* Evaluate all strings provided with --eval. Also set up the $(-*-eval-flags-*-) variable. */ if (eval_strings) { char *p, *endp, *value; unsigned int i; size_t len = (CSTRLEN ("--eval=") + 1) * eval_strings->idx; for (i = 0; i < eval_strings->idx; ++i) { p = xstrdup (eval_strings->list[i]); len += 2 * strlen (p); eval_buffer (p, NULL); free (p); } p = endp = value = xmalloc (len); for (i = 0; i < eval_strings->idx; ++i) { p = stpcpy (p, "--eval="); p = quote_for_env (p, eval_strings->list[i]); endp = p++; *endp = ' '; } *endp = '\0'; define_variable_cname ("-*-eval-flags-*-", value, o_automatic, 0); free (value); } { int old_arg_job_slots = arg_job_slots; old_builtin_rules_flag = no_builtin_rules_flag; old_builtin_variables_flag = no_builtin_variables_flag; /* Read all the makefiles. */ read_files = read_all_makefiles (makefiles == 0 ? 0 : makefiles->list); arg_job_slots = INVALID_JOB_SLOTS; /* Decode switches again, for variables set by the makefile. */ decode_env_switches (STRING_SIZE_TUPLE (GNUMAKEFLAGS_NAME), o_env); /* Clear GNUMAKEFLAGS to avoid duplication. */ define_variable_cname (GNUMAKEFLAGS_NAME, "", o_override, 0); decode_env_switches (STRING_SIZE_TUPLE (MAKEFLAGS_NAME), o_env); #if 0 decode_env_switches (STRING_SIZE_TUPLE ("MFLAGS")); #endif /* If -j is not set in the makefile, or it was set on the command line, reset to use the previous value. */ if (arg_job_slots == INVALID_JOB_SLOTS || argv_slots != INVALID_JOB_SLOTS) arg_job_slots = old_arg_job_slots; else if (jobserver_auth && arg_job_slots != old_arg_job_slots) { /* Makefile MAKEFLAGS set -j, but we already have a jobserver. Make us the master of a new jobserver group. */ if (!restarts) ON (error, NILF, _("warning: -j%d forced in makefile: resetting jobserver mode"), arg_job_slots); /* We can't use our parent's jobserver, so reset. */ reset_jobserver (); } /* Reset in case the switches changed our mind. */ syncing = (output_sync == OUTPUT_SYNC_LINE || output_sync == OUTPUT_SYNC_TARGET); if (make_sync.syncout && ! syncing) output_close (&make_sync); make_sync.syncout = syncing; OUTPUT_SET (&make_sync); disable_builtins (); } #if MK_OS_W32 /* look one last time after reading all Makefiles */ if (no_default_sh_exe) no_default_sh_exe = !find_and_set_default_shell (NULL); #endif /* MK_OS_W32 */ #if MK_OS_DOS || MK_OS_OS2 || MK_OS_VMS /* We need to know what kind of shell we will be using. */ { extern int _is_unixy_shell (const char *_path); struct variable *shv = lookup_variable (STRING_SIZE_TUPLE ("SHELL")); extern int unixy_shell; extern const char *default_shell; if (shv && *shv->value) { char *shell_path = recursively_expand (shv); if (shell_path && _is_unixy_shell (shell_path)) unixy_shell = 1; else unixy_shell = 0; if (shell_path) default_shell = shell_path; } } #endif /* MK_OS_DOS || MK_OS_OS2 */ /* Final jobserver configuration. If we have jobserver_auth then we are a client in an existing jobserver group, that's already been verified OK above. If we don't have jobserver_auth and jobserver is enabled, then start a new jobserver. arg_job_slots = INVALID_JOB_SLOTS if we don't want -j in MAKEFLAGS arg_job_slots = # of jobs of parallelism job_slots = 0 for no limits on jobs, or when limiting via jobserver. job_slots = 1 for standard non-parallel mode. job_slots >1 for old-style parallelism without jobservers. */ if (jobserver_auth) job_slots = 0; else if (arg_job_slots == INVALID_JOB_SLOTS) job_slots = 1; else job_slots = arg_job_slots; #if MK_OS_DOS || MK_OS_OS2 || MK_OS_VMS if (job_slots != 1 # if MK_OS_OS2 && _osmode != OS2_MODE /* turn off -j if we are in DOS mode */ # endif ) { O (error, NILF, _("parallel jobs (-j) are not supported on this platform")); O (error, NILF, _("resetting to single job (-j1) mode")); arg_job_slots = INVALID_JOB_SLOTS; job_slots = 1; } #endif /* If we have >1 slot at this point, then we're a top-level make. Set up the jobserver. Every make assumes that it always has one job it can run. For the submakes it's the token they were given by their parent. For the top make, we just subtract one from the number the user wants. */ if (job_slots > 1 && jobserver_setup (job_slots - 1, jobserver_style)) { /* Fill in the jobserver_auth for our children. */ jobserver_auth = jobserver_get_auth (); if (jobserver_auth) { /* We're using the jobserver so set job_slots to 0. */ master_job_slots = job_slots; job_slots = 0; } } /* If we're not using parallel jobs, then we don't need output sync. This is so people can enable output sync in GNUMAKEFLAGS or similar, but not have it take effect unless parallel builds are enabled. */ if (syncing && job_slots == 1) { OUTPUT_UNSET (); output_close (&make_sync); syncing = 0; output_sync = OUTPUT_SYNC_NONE; } if (syncing) { /* If there is no mutex we're the base: create one. Else parse it. */ if (!sync_mutex) { osync_setup (); sync_mutex = osync_get_mutex (); } else if (!osync_parse_mutex (sync_mutex)) { /* Parsing failed; continue without output sync. */ osync_clear (); free (sync_mutex); sync_mutex = NULL; syncing = 0; } } if (jobserver_auth) DB (DB_VERBOSE|DB_JOBS, (_("Using jobserver controller %s\n"), jobserver_auth)); if (sync_mutex) DB (DB_VERBOSE, (_("Using output-sync mutex %s\n"), sync_mutex)); #ifndef MAKE_SYMLINKS if (check_symlink_flag) { O (error, NILF, _("symbolic links not supported: disabling -L")); check_symlink_flag = 0; } #endif /* Set up MAKEFLAGS and MFLAGS again, so they will be right. */ define_makeflags (0); /* Make each 'struct goaldep' point at the 'struct file' for the file depended on. Also do magic for special targets. */ snap_deps (); /* Define the file rules for the built-in suffix rules. These will later be converted into pattern rules. */ install_default_suffix_rules (); /* Convert old-style suffix rules to pattern rules. It is important to do this before installing the built-in pattern rules below, so that makefile-specified suffix rules take precedence over built-in pattern rules. */ convert_to_pattern (); /* Install the default implicit pattern rules. This used to be done before reading the makefiles. But in that case, built-in pattern rules were in the chain before user-defined ones, so they matched first. */ install_default_implicit_rules (); /* Compute implicit rule limits and do magic for pattern rules. */ snap_implicit_rules (); /* Construct the listings of directories in VPATH lists. */ build_vpath_lists (); /* Mark files given with -o flags as very old and as having been updated already, and files given with -W flags as brand new (time-stamp as far as possible into the future). If restarts is set we'll do -W later. */ if (old_files != 0) { const char **p; for (p = old_files->list; *p != 0; ++p) { struct file *f = enter_file (*p); f->last_mtime = f->mtime_before_update = OLD_MTIME; f->updated = 1; f->update_status = us_success; f->command_state = cs_finished; } } /* If the user wants to see a list of targets show it now then quit. We do this before rebuilding makefiles to avoid extraneous output. */ if (print_targets_flag) { print_targets (); die (EXIT_SUCCESS); } if (!restarts && new_files != 0) { const char **p; for (p = new_files->list; *p != 0; ++p) { struct file *f = enter_file (*p); f->last_mtime = f->mtime_before_update = NEW_MTIME; } } /* Initialize the remote job module. */ remote_setup (); /* Dump any output we've collected. */ OUTPUT_UNSET (); output_close (&make_sync); if (shuffle_mode) DB (DB_BASIC, (_("Enabled shuffle mode: %s\n"), shuffle_mode)); if (read_files) { /* Update any makefiles if necessary. */ FILE_TIMESTAMP *makefile_mtimes; struct goaldep *skipped_makefiles = NULL; const char **nargv = (const char **) argv; int any_failed = 0; enum update_status status; DB (DB_BASIC, (_("Updating makefiles....\n"))); /* Count the makefiles, and reverse the order so that we attempt to rebuild them in the order they were read. */ { unsigned int num_mkfiles = 0; struct goaldep *d = read_files; read_files = NULL; while (d != NULL) { struct goaldep *t = d; d = d->next; t->next = read_files; read_files = t; ++num_mkfiles; } makefile_mtimes = alloca (num_mkfiles * sizeof (FILE_TIMESTAMP)); } /* Remove any makefiles we don't want to try to update. Record the current modtimes of the others so we can compare them later. */ { struct goaldep *d = read_files; struct goaldep *last = NULL; unsigned int mm_idx = 0; while (d != 0) { int skip = 0; struct file *f = d->file; /* Check for makefiles that are either phony or a :: target with commands, but no dependencies. These will always be remade, which will cause an infinite restart loop, so don't try to remake it (this will only happen if your makefiles are written exceptionally stupidly; but if you work for Athena, that's how you write your makefiles.) */ if (f->phony) skip = 1; else for (f = f->double_colon; f != NULL; f = f->prev) if (f->deps == NULL && f->cmds != NULL) { skip = 1; break; } if (!skip) { makefile_mtimes[mm_idx++] = file_mtime_no_search (d->file); last = d; d = d->next; } else { DB (DB_VERBOSE, (_("Makefile '%s' might loop; not remaking it.\n"), f->name)); if (last) last->next = d->next; else read_files = d->next; if (d->error && ! (d->flags & RM_DONTCARE)) { /* This file won't be rebuilt, was not found, and we care, so remember it to report later. */ d->next = skipped_makefiles; skipped_makefiles = d; any_failed = 1; } else free_goaldep (d); d = last ? last->next : read_files; } } } /* Set up 'MAKEFLAGS' specially while remaking makefiles. */ define_makeflags (1); { int orig_db_level = db_level; if (! ISDB (DB_MAKEFILES)) db_level = DB_NONE; rebuilding_makefiles = 1; status = update_goal_chain (read_files); rebuilding_makefiles = 0; db_level = orig_db_level; } /* Report errors for makefiles that needed to be remade but were not. */ while (skipped_makefiles != NULL) { struct goaldep *d = skipped_makefiles; const char *err = strerror (d->error); OSS (error, &d->floc, _("%s: %s"), dep_name (d), err); skipped_makefiles = skipped_makefiles->next; free_goaldep (d); } /* If we couldn't build something we need but otherwise we succeeded, reset the status. */ if (any_failed && status == us_success) status = us_none; switch (status) { case us_question: /* The only way this can happen is if the user specified -q and asked for one of the makefiles to be remade as a target on the command line. Since we're not actually updating anything with -q we can treat this as "did nothing". */ break; case us_none: { /* Reload any unloaded shared objects. Do not re-exec to have that shared object loaded: a re-exec would cause an infinite loop, because the shared object was not updated. */ struct goaldep *d; for (d = read_files; d; d = d->next) if (d->file->unloaded) { struct file *f = d->file; /* Load the file. 0 means failure. */ if (load_file (&d->floc, f, 0) == 0) OS (fatal, &d->floc, _("%s: failed to load"), f->name); f->unloaded = 0; f->loaded = 1; } } /* No makefiles needed to be updated. If we couldn't read some included file that we care about, fail. */ if (0) { /* This runs afoul of https://savannah.gnu.org/bugs/?61226 The problem is that many makefiles use a "dummy rule" to pretend that an included file is rebuilt, without actually rebuilding it, and this has always worked. There are a number of solutions proposed in that bug but for now we'll put things back so they work the way they did before. */ struct goaldep *d; for (d = read_files; d != 0; d = d->next) if (d->error && ! (d->flags & RM_DONTCARE)) { /* This makefile couldn't be loaded, and we care. */ const char *err = strerror (d->error); OSS (error, &d->floc, _("%s: %s"), dep_name (d), err); any_failed = 1; } } break; case us_failed: /* Failed to update. Figure out if we care. */ { /* Nonzero if any makefile was successfully remade. */ int any_remade = 0; unsigned int i; struct goaldep *d; for (i = 0, d = read_files; d != 0; ++i, d = d->next) { if (d->file->updated) { /* This makefile was updated. */ if (d->file->update_status == us_success) /* It was successfully updated. */ any_remade |= (file_mtime_no_search (d->file) != makefile_mtimes[i]); else if (! (d->flags & RM_DONTCARE)) { FILE_TIMESTAMP mtime; /* The update failed and this makefile was not from the MAKEFILES variable, so we care. */ OS (error, &d->floc, _("failed to remake makefile '%s'"), d->file->name); mtime = file_mtime_no_search (d->file); any_remade |= (mtime != NONEXISTENT_MTIME && mtime != makefile_mtimes[i]); makefile_status = MAKE_FAILURE; any_failed = 1; } } /* This makefile was not found at all. */ else if (! (d->flags & RM_DONTCARE)) { const char *dnm = dep_name (d); /* This is a makefile we care about. See how much. */ if (d->flags & RM_INCLUDED) /* An included makefile. We don't need to die, but we do want to complain. */ OS (error, &d->floc, _("included makefile '%s' was not found"), dnm); else { /* A normal makefile. We must die later. */ OS (error, NILF, _("makefile '%s' was not found"), dnm); any_failed = 1; } } } if (any_remade) goto re_exec; break; } case us_success: re_exec: /* Updated successfully. Re-exec ourselves. */ remove_intermediates (0); if (print_data_base_flag) print_data_base (); clean_jobserver (0); if (makefiles != 0) { /* Makefile names might have changed due to expansion. It's possible we'll need one extra argument: make -Rf- will expand to: make -R --temp-stdin=<tmpfile> so allocate more space. */ int mfidx = 0; char** av = argv; const char** nv; nv = nargv = alloca (sizeof (char*) * (argc + 1 + 1)); *(nv++) = *(av++); for (; *av; ++av, ++nv) { char *f; char *a = *av; const char *mf = makefiles->list[mfidx]; assert (strlen (a) > 0); *nv = a; /* Not an option: we handled option args earlier. */ if (a[0] != '-') continue; /* See if this option specifies a filename. If so we need to replace it with the value from makefiles->list. To simplify, we'll replace all possible versions of this flag with a simple "-f<name>". */ /* Handle long options. */ if (a[1] == '-') { if (strcmp (a, "--file") == 0 || strcmp (a, "--makefile") == 0) /* Skip the next arg as we'll combine them. */ ++av; else if (!strneq (a, "--file=", 7) && !strneq (a, "--makefile=", 11)) continue; if (mfidx == stdin_offset) { char *na = alloca (CSTRLEN ("--temp-stdin=") + strlen (mf) + 1); sprintf (na, "--temp-stdin=%s", mf); *nv = na; } else { char *na = alloca (strlen (mf) + 3); sprintf (na, "-f%s", mf); *nv = na; } ++mfidx; continue; } /* Handle short options. If 'f' is the last option, it may be followed by <name>. */ f = strchr (a, 'f'); if (!f) continue; /* If there's an extra argument option skip it. */ if (f[1] == '\0') ++av; if (mfidx == stdin_offset) { const size_t al = f - a; char *na; if (al > 1) { /* Preserve the prior options. */ na = alloca (al + 1); memcpy (na, a, al); na[al] = '\0'; *(nv++) = na; } /* Remove the "f" and any subsequent content. */ na = alloca (CSTRLEN ("--temp-stdin=") + strlen (mf) + 1); sprintf (na, "--temp-stdin=%s", mf); *nv = na; } else if (f[1] == '\0') /* -f <name> or -xyzf <name>. Replace the name. */ *(++nv) = mf; else { /* -f<name> or -xyzf<name>. */ const size_t al = f - a + 1; const size_t ml = strlen (mf) + 1; char *na = alloca (al + ml); memcpy (na, a, al); memcpy (na + al, mf, ml); *nv = na; } ++mfidx; } *nv = NULL; } if (directories != 0 && directories->idx > 0) { int bad = 1; if (directory_before_chdir != 0) { if (chdir (directory_before_chdir) < 0) perror_with_name ("chdir", ""); else bad = 0; } if (bad) O (fatal, NILF, _("couldn't change back to original directory")); } ++restarts; if (ISDB (DB_BASIC)) { const char **p; printf (_("Re-executing[%u]:"), restarts); for (p = nargv; *p != 0; ++p) printf (" %s", *p); putchar ('\n'); fflush (stdout); } { char **p; for (p = environ; *p != 0; ++p) { if (strneq (*p, MAKELEVEL_NAME "=", MAKELEVEL_LENGTH+1)) { *p = alloca (40); sprintf (*p, "%s=%u", MAKELEVEL_NAME, makelevel); #if MK_OS_VMS vms_putenv_symbol (*p); #endif } else if (strneq (*p, "MAKE_RESTARTS=", CSTRLEN ("MAKE_RESTARTS="))) { *p = alloca (40); sprintf (*p, "MAKE_RESTARTS=%s%u", OUTPUT_IS_TRACED () ? "-" : "", restarts); restarts = 0; } } } /* If we didn't set the restarts variable yet, add it. */ if (restarts) { char *b = alloca (40); sprintf (b, "MAKE_RESTARTS=%s%u", OUTPUT_IS_TRACED () ? "-" : "", restarts); putenv (b); } fflush (stdout); fflush (stderr); osync_clear(); /* The exec'd "child" will be another make, of course. */ jobserver_pre_child(1); #if MK_OS_OS2 { /* It is not possible to use execve() here because this would cause the parent process to be terminated with exit code 0 before the child process has been terminated. Therefore it may be the best solution simply to spawn the child process including all file handles and to wait for its termination. */ pid_t pid; int r; struct childbase child; child.cmd_name = NULL; child.output.syncout = 0; child.environment = environ; pid = child_execute_job (&child, 1, (char **)nargv); /* is this loop really necessary? */ do { pid = wait (&r); } while (pid <= 0); /* use the exit code of the child process */ exit (WIFEXITED(r) ? WEXITSTATUS(r) : EXIT_FAILURE); } #else #ifdef SET_STACK_SIZE /* Reset limits, if necessary. */ if (stack_limit.rlim_cur) setrlimit (RLIMIT_STACK, &stack_limit); #endif exec_command ((char **)nargv, environ); #endif jobserver_post_child(1); temp_stdin_unlink (); _exit (127); } if (any_failed) die (MAKE_FAILURE); } /* Set up 'MAKEFLAGS' again for the normal targets. */ define_makeflags (0); /* Set always_make_flag if -B was given. */ always_make_flag = always_make_set; /* If restarts is set we haven't set up -W files yet, so do that now. */ if (restarts && new_files != 0) { const char **p; for (p = new_files->list; *p != 0; ++p) { struct file *f = enter_file (*p); f->last_mtime = f->mtime_before_update = NEW_MTIME; } } temp_stdin_unlink (); /* If there were no command-line goals, use the default. */ if (goals == 0) { char *p; if (default_goal_var->recursive) p = expand_string (default_goal_var->value); else { p = variable_buffer_output (variable_buffer, default_goal_var->value, strlen (default_goal_var->value)); *p = '\0'; p = variable_buffer; } if (*p != '\0') { struct file *f = lookup_file (p); /* If .DEFAULT_GOAL is a non-existent target, enter it into the table and let the standard logic sort it out. */ if (f == 0) { struct nameseq *ns; ns = PARSE_SIMPLE_SEQ (&p, struct nameseq); if (ns) { /* .DEFAULT_GOAL should contain one target. */ if (ns->next != 0) O (fatal, NILF, _(".DEFAULT_GOAL contains more than one target")); f = enter_file (strcache_add (ns->name)); ns->name = 0; /* It was reused by enter_file(). */ free_ns_chain (ns); } } if (f) { goals = alloc_goaldep (); goals->file = f; } } } else lastgoal->next = 0; if (!goals) { struct variable *v = lookup_variable (STRING_SIZE_TUPLE ("MAKEFILE_LIST")); if (v && v->value && v->value[0] != '\0') O (fatal, NILF, _("No targets")); O (fatal, NILF, _("No targets specified and no makefile found")); } /* Shuffle prerequisites to catch makefiles with incomplete depends. */ shuffle_goaldeps_recursive (goals); /* Update the goals. */ DB (DB_BASIC, (_("Updating goal targets....\n"))); { switch (update_goal_chain (goals)) { case us_none: /* Nothing happened. */ /* FALLTHROUGH */ case us_success: /* Keep the previous result. */ break; case us_question: /* We are under -q and would run some commands. */ makefile_status = MAKE_TROUBLE; break; case us_failed: /* Updating failed. POSIX.2 specifies exit status >1 for this; */ makefile_status = MAKE_FAILURE; break; } /* If we detected some clock skew, generate one last warning */ if (clock_skew_detected) O (error, NILF, _("warning: clock skew detected: your build may be incomplete")); /* Exit. */ die (makefile_status); } /* NOTREACHED */ exit (MAKE_SUCCESS); } /* Parsing of arguments, decoding of switches. */ static char options[1 + ARRAYLEN (switches) * 3]; static struct option long_options[ARRAYLEN (switches) + ARRAYLEN (long_option_aliases)]; /* Fill in the string and vector for getopt. */ static void init_switches (void) { char *p; unsigned int c; unsigned int i; if (options[0] != '\0') /* Already done. */ return; p = options; /* Return switch and non-switch args in order, regardless of POSIXLY_CORRECT. Non-switch args are returned as option 1. */ *p++ = '-'; for (i = 0; switches[i].c != '\0'; ++i) { long_options[i].name = (char *) (switches[i].long_name == 0 ? "" : switches[i].long_name); long_options[i].flag = 0; long_options[i].val = switches[i].c; if (short_option (switches[i].c)) *p++ = (char) switches[i].c; switch (switches[i].type) { case flag: case flag_off: case ignore: long_options[i].has_arg = no_argument; break; case string: case strlist: case filename: case positive_int: case floating: if (short_option (switches[i].c)) *p++ = ':'; if (switches[i].noarg_value != 0) { if (short_option (switches[i].c)) *p++ = ':'; long_options[i].has_arg = optional_argument; } else long_options[i].has_arg = required_argument; break; } } *p = '\0'; for (c = 0; c < ARRAYLEN (long_option_aliases); ++c) long_options[i++] = long_option_aliases[c]; long_options[i].name = 0; } /* Non-option argument. It might be a variable definition. Returns 1 if the argument we read was .WAIT, else 0. */ static unsigned int handle_non_switch_argument (const char *arg, enum variable_origin origin) { struct variable *v; if (arg[0] == '-' && arg[1] == '\0') /* Ignore plain '-' for compatibility. */ return 0; #if MK_OS_VMS { /* VMS DCL quoting can result in foo="bar baz" showing up here. Need to remove the double quotes from the value. */ char * eq_ptr; char * new_arg; eq_ptr = strchr (arg, '='); if ((eq_ptr != NULL) && (eq_ptr[1] == '"')) { int len; int seg1; int seg2; len = strlen(arg); new_arg = alloca(len); seg1 = eq_ptr - arg + 1; strncpy(new_arg, arg, (seg1)); seg2 = len - seg1 - 1; strncpy(&new_arg[seg1], &eq_ptr[2], seg2); new_arg[seg1 + seg2] = 0; if (new_arg[seg1 + seg2 - 1] == '"') new_arg[seg1 + seg2 - 1] = 0; arg = new_arg; } } #endif v = try_variable_definition (0, arg, origin, s_global); if (v != 0) { /* It is indeed a variable definition. If we don't already have this one, record a pointer to the variable for later use in define_makeflags. */ struct command_variable *cv; for (cv = command_variables; cv != 0; cv = cv->next) if (cv->variable == v) break; if (! cv) { cv = xmalloc (sizeof (*cv)); cv->variable = v; cv->next = command_variables; command_variables = cv; } } else if (arg[0] != '\0' && origin == o_command) { /* Not an option or variable definition; it must be a goal target. Enter it as a file and add it to the dep chain of goals. Check ARG[0] because if the top makefile resets MAKEOVERRIDES then ARG points to an empty string in the submake. */ struct file *f; if (strcmp (arg, ".WAIT") == 0) return 1; f = enter_file (strcache_add (expand_command_line_file (arg))); f->cmd_target = 1; if (goals == 0) { goals = alloc_goaldep (); lastgoal = goals; } else { lastgoal->next = alloc_goaldep (); lastgoal = lastgoal->next; } lastgoal->file = f; { /* Add this target name to the MAKECMDGOALS variable. */ struct variable *gv; const char *value; gv = lookup_variable (STRING_SIZE_TUPLE ("MAKECMDGOALS")); if (gv == 0) value = f->name; else { /* Paste the old and new values together */ size_t oldlen, newlen; char *vp; oldlen = strlen (gv->value); newlen = strlen (f->name); vp = alloca (oldlen + 1 + newlen + 1); memcpy (vp, gv->value, oldlen); vp[oldlen] = ' '; memcpy (&vp[oldlen + 1], f->name, newlen + 1); value = vp; } define_variable_cname ("MAKECMDGOALS", value, o_default, 0); } } return 0; } /* Called if the makefile resets the MAKEFLAGS variable. */ void reset_makeflags (enum variable_origin origin) { /* Reset to default values. */ env_overrides = 0; decode_env_switches (STRING_SIZE_TUPLE(MAKEFLAGS_NAME), origin); construct_include_path (include_dirs ? include_dirs->list : NULL); disable_builtins (); define_makeflags (rebuilding_makefiles); } /* Decode switches from ARGC and ARGV. They came from the environment if ORIGIN is o_env. */ static void decode_switches (int argc, const char **argv, enum variable_origin origin) { int bad = 0; struct command_switch *cs; struct stringlist *sl; struct stringlist targets; int c; unsigned int found_wait = 0; const char **a; /* This is for safety/double-checking. */ static int using_getopt = 0; assert (using_getopt == 0); using_getopt = 1; /* Get enough space for all the arguments, just in case. */ targets.max = argc + 1; targets.list = alloca (targets.max * sizeof (const char **)); targets.idx = 0; /* getopt does most of the parsing for us. First, get its vectors set up. */ init_switches (); /* Let getopt produce error messages for the command line, but not for options from the environment. */ opterr = origin == o_command; /* Reset getopt's state. */ optind = 0; while (optind < argc) { const char *coptarg; /* Parse the next argument. */ c = getopt_long (argc, (char *const *)argv, options, long_options, NULL); coptarg = optarg; if (c == EOF) /* End of arguments, or "--" marker seen. */ break; else if (c == '?') /* Bad option. We will print a usage message and die later. But continue to parse the other options so the user can see all he did wrong. */ bad = 1; else if (c == 1) /* An argument not starting with a dash. Defer handling until later, since handle_non_switch_argument() might corrupt getopt(). */ targets.list[targets.idx++] = coptarg; else /* An option starting with a dash. */ for (cs = switches; cs->c != '\0'; ++cs) if (cs->c == c) { /* Whether or not we will actually do anything with this switch. We test this individually inside the switch below rather than just once outside it, so that options which are to be ignored still consume args. */ int doit = (origin == o_command || (cs->env && (cs->origin == NULL || origin >= *cs->origin))); if (doit) cs->specified = 1; switch (cs->type) { default: abort (); case ignore: break; case flag: case flag_off: if (doit) { *(int *) cs->value_ptr = cs->type == flag; if (cs->origin) *cs->origin = origin; } break; case string: case strlist: case filename: if (!doit) break; if (! coptarg) coptarg = cs->noarg_value; else if (*coptarg == '\0') { char opt[2] = "c"; const char *op = opt; if (short_option (cs->c)) opt[0] = (char) cs->c; else op = cs->long_name; error (NILF, strlen (op), _("the '%s%s' option requires a non-empty string argument"), short_option (cs->c) ? "-" : "--", op); bad = 1; break; } if (cs->type == string) { char **val = (char **)cs->value_ptr; free (*val); *val = xstrdup (coptarg); if (cs->origin) *cs->origin = origin; break; } sl = *(struct stringlist **) cs->value_ptr; if (sl == 0) { sl = xmalloc (sizeof (struct stringlist)); sl->max = 5; sl->idx = 0; sl->list = xmalloc (5 * sizeof (char *)); *(struct stringlist **) cs->value_ptr = sl; } else if (sl->idx == sl->max - 1) { sl->max += 5; /* MSVC erroneously warns without a cast here. */ sl->list = xrealloc ((void *)sl->list, sl->max * sizeof (char *)); } /* Filter out duplicate options. Order matters for warnings. Allow duplicate makefiles for backward compatibility. */ if (cs->c != 'f' && cs->c != WARN_OPT) { unsigned int k; for (k = 0; k < sl->idx; ++k) if (streq (sl->list[k], coptarg)) break; if (k < sl->idx) break; } if (cs->type == strlist) { sl->list[sl->idx++] = xstrdup (coptarg); if (cs->origin) *cs->origin = origin; } else if (cs->c == TEMP_STDIN_OPT) { if (stdin_offset > 0) fatal (NILF, 0, "INTERNAL: multiple --temp-stdin options provided!"); /* We don't need to expand the temp file. */ stdin_offset = sl->idx; sl->list[sl->idx++] = strcache_add (coptarg); if (cs->origin) *cs->origin = origin; } else { sl->list[sl->idx++] = expand_command_line_file (coptarg); if (cs->origin) *cs->origin = origin; } sl->list[sl->idx] = 0; break; case positive_int: /* See if we have an option argument; if we do require that it's all digits, not something like "10foo". */ if (coptarg == 0 && argc > optind) { const char *cp; for (cp=argv[optind]; ISDIGIT (cp[0]); ++cp) ; if (cp[0] == '\0') coptarg = argv[optind++]; } if (!doit) break; if (coptarg) { const char *err; unsigned int i = make_toui (coptarg, &err); if (err || i == 0) { error (NILF, 0, _("the '-%c' option requires a positive integer argument"), cs->c); bad = 1; } else { *(unsigned int *) cs->value_ptr = i; if (cs->origin) *cs->origin = origin; } } else { *(unsigned int *) cs->value_ptr = *(unsigned int *) cs->noarg_value; if (cs->origin) *cs->origin = origin; } break; case floating: if (coptarg == 0 && optind < argc && (ISDIGIT (argv[optind][0]) || argv[optind][0] == '.')) coptarg = argv[optind++]; if (doit) { *(double *) cs->value_ptr = (coptarg != 0 ? atof (coptarg) : *(double *) cs->noarg_value); if (cs->origin) *cs->origin = origin; } break; } /* We've found the switch. Stop looking. */ break; } } /* There are no more options according to getting getopt, but there may be some arguments left. Since we have asked for non-option arguments to be returned in order, this only happens when there is a "--" argument to prevent later arguments from being options. */ while (optind < argc) targets.list[targets.idx++] = argv[optind++]; targets.list[targets.idx] = NULL; /* Cannot call getopt below this line. */ using_getopt = 0; /* handle_non_switch_argument() can only be called after getopt is done; if one of the arguments is MAKEFLAGS=<value> then it will recurse here and call getopt() again, corrupting the state if the outer method. */ for (a = targets.list; *a; ++a) { const int prior_found_wait = found_wait; found_wait = handle_non_switch_argument (*a, origin); if (prior_found_wait && lastgoal) lastgoal->wait_here = 1; } if (bad && origin == o_command) print_usage (bad); /* If there are any options that need to be decoded do it now. */ decode_debug_flags (); decode_output_sync_flags (); /* Support old-style option. */ if (warn_undefined_variables_flag) { decode_warn_actions ("undefined-var", NULL); warn_undefined_variables_flag = 0; } if (warn_flags) for (const char **pp = warn_flags->list; *pp; ++pp) decode_warn_actions (*pp, NULL); /* Perform any special switch handling. */ run_silent = silent_flag; /* Check variable priorities. */ reset_env_override (); } /* Decode switches from environment variable ENVAR (which is LEN chars long). We do this by chopping the value into a vector of words, prepending a dash to the first word if it lacks one, and passing the vector to decode_switches. */ static void decode_env_switches (const char *envar, size_t len, enum variable_origin origin) { char *value, *p, *buf; int argc; const char **argv; /* Get the variable's value. */ value = expand_variable (envar, len); /* Skip whitespace, and check for an empty value. */ NEXT_TOKEN (value); len = strlen (value); if (len == 0) return; /* Allocate an array that is definitely big enough. */ argv = xmalloc ((1 + len + 1) * sizeof (char *)); /* getopt will look at the arguments starting at ARGV[1]. Prepend a spacer word. */ argv[0] = ""; argc = 1; /* We need a buffer to copy the value into while we split it into words and unquote it. Set up in case we need to prepend a dash later. */ buf = xmalloc (1 + len + 1); buf[0] = '-'; p = buf+1; argv[argc] = p; while (*value != '\0') { if (*value == '\\' && value[1] != '\0') ++value; /* Skip the backslash. */ else if (ISBLANK (*value)) { /* End of the word. */ *p++ = '\0'; argv[++argc] = p; do ++value; while (ISBLANK (*value)); continue; } *p++ = *value++; } *p = '\0'; argv[++argc] = 0; assert (p < buf + len + 2); if (argv[1][0] != '-' && strchr (argv[1], '=') == 0) /* The first word doesn't start with a dash and isn't a variable definition, so add a dash. */ argv[1] = buf; /* Parse those words. */ decode_switches (argc, argv, origin); free (buf); free (argv); } /* Quote the string IN so that it will be interpreted as a single word with no magic by decode_env_switches; also double dollar signs to avoid variable expansion in make itself. Write the result into OUT, returning the address of the next character to be written. Allocating space for OUT twice the length of IN is always sufficient. */ static char * quote_for_env (char *out, const char *in) { while (*in != '\0') { if (*in == '$') *out++ = '$'; else if (ISBLANK (*in) || *in == '\\') *out++ = '\\'; *out++ = *in++; } return out; } /* Disable builtin variables and rules, if -R or -r is specified. This function is called at parse time whenever MAKEFLAGS is modified and also when the parsing phase is over. */ static void disable_builtins () { /* If -R was given, set -r too (doesn't make sense otherwise!) */ if (no_builtin_variables_flag) no_builtin_rules_flag = 1; /* If we've disabled builtin rules, get rid of them. */ if (no_builtin_rules_flag && ! old_builtin_rules_flag) { old_builtin_rules_flag = 1; if (suffix_file && suffix_file->builtin) { free_dep_chain (suffix_file->deps); suffix_file->deps = 0; } define_variable_cname ("SUFFIXES", "", o_default, 0); } /* If we've disabled builtin variables, get rid of them. */ if (no_builtin_variables_flag && ! old_builtin_variables_flag) { old_builtin_variables_flag = 1; undefine_default_variables (); } } /* Define the MAKEFLAGS and MFLAGS variables to reflect the settings of the command switches. Always include options with args. Don't include options with the 'no_makefile' flag set if MAKEFILE. */ struct variable * define_makeflags (int makefile) { const char ref[] = "MAKEOVERRIDES"; const char posixref[] = "-*-command-variables-*-"; const char evalref[] = " $(-*-eval-flags-*-)"; const struct command_switch *cs; struct variable *v; char *bufsave; size_t lensave; char *fp; char c[3]; install_variable_buffer (&bufsave, &lensave); /* Start with a dash, for MFLAGS. */ fp = variable_buffer_output (variable_buffer, "-", 1); #define SHORT_NOT_DEFAULT(_c) \ ((!*(int *) (_c)->value_ptr) == ((_c)->type == flag_off) \ && ((_c)->default_value == NULL || (_c)->specified \ || *(int *) (_c)->value_ptr != *(int *) (_c)->default_value)) /* Add simple options as a group. These can't have args by definion. */ for (cs = switches; cs->c != '\0'; ++cs) if (cs->toenv && short_option (cs->c) && (!makefile || !cs->no_makefile) && (cs->type == flag || cs->type == flag_off) && SHORT_NOT_DEFAULT (cs)) { c[0] = (char)cs->c; fp = variable_buffer_output (fp, c, 1); } memcpy (c, " --", 3); #define ADD_OPT(_c) \ do{ \ if (short_option (cs->c)) \ { \ c[2] = (char)cs->c; \ fp = variable_buffer_output (fp, c, 3); \ } \ else \ { \ c[2] = '-'; \ fp = variable_buffer_output (fp, c, 3); \ fp = variable_buffer_output (fp, cs->long_name, \ strlen (cs->long_name)); \ } \ }while(0) /* Now add more complex flags: ones with options and/or long names. */ for (cs = switches; cs->c != '\0'; ++cs) if (cs->toenv && (!makefile || !cs->no_makefile)) switch (cs->type) { case ignore: break; case flag: case flag_off: /* We did the short flags above. */ if (!short_option (cs->c) && SHORT_NOT_DEFAULT (cs)) ADD_OPT (cs); break; case positive_int: if ((cs->default_value != 0 && (*(unsigned int *) cs->value_ptr == *(unsigned int *) cs->default_value))) break; ADD_OPT (cs); if (!cs->noarg_value || (*(unsigned int *) cs->value_ptr != *(unsigned int *) cs->noarg_value)) { /* Add the value if not omitted. */ char *buf = alloca (30); int buflen = sprintf (buf, "%u", *(unsigned int *) cs->value_ptr); if (!short_option (cs->c)) fp = variable_buffer_output (fp, "=", 1); fp = variable_buffer_output (fp, buf, buflen); } break; case floating: if (cs->default_value != 0 && (*(double *) cs->value_ptr == *(double *) cs->default_value)) break; ADD_OPT (cs); if (!cs->noarg_value || (*(double *) cs->value_ptr != *(double *) cs->noarg_value)) { char *buf = alloca (100); int buflen = sprintf (buf, "%g", *(double *) cs->value_ptr); if (!short_option (cs->c)) fp = variable_buffer_output (fp, "=", 1); fp = variable_buffer_output (fp, buf, buflen); } break; case string: { char *p = *((char **)cs->value_ptr); if (p) { ADD_OPT (cs); if (!short_option (cs->c)) fp = variable_buffer_output (fp, "=", 1); fp = variable_buffer_output(fp, p, strlen (p)); } } break; case filename: case strlist: if (cs->c == WARN_OPT) fp = encode_warn_flag (fp); else { struct stringlist *sl = *(struct stringlist **) cs->value_ptr; if (sl != 0) { unsigned int i; for (i = 0; i < sl->idx; ++i) { ADD_OPT (cs); if (!short_option (cs->c)) fp = variable_buffer_output (fp, "=", 1); fp = variable_buffer_output (fp, sl->list[i], strlen (sl->list[i])); } } } break; default: abort (); } #undef ADD_OPT #undef SHORT_NOT_DEFAULT /* If no flags at all, get rid of the initial dash. */ if (fp == variable_buffer + 1) fp = variable_buffer; *fp = '\0'; /* Define MFLAGS before appending variable definitions. Omit an initial empty dash. Since MFLAGS is not parsed for flags, there is no reason to override any makefile redefinition. */ define_variable_cname ("MFLAGS", variable_buffer + (variable_buffer[0] == '-' && variable_buffer[1] == ' ' ? 2 : 0), o_env, 1); /* Write a reference to -*-eval-flags-*-, which contains all the --eval flag options. */ if (eval_strings) fp = variable_buffer_output (fp, evalref, CSTRLEN (evalref)); { /* If there are any overrides to add, write a reference to $(MAKEOVERRIDES), which contains command-line variable definitions. Separate the variables from the switches with a "--" arg. */ const char *r = posix_pedantic ? posixref : ref; size_t l = strlen (r); v = lookup_variable (r, l); if (v && v->value && v->value[0] != '\0') { fp = variable_buffer_output (fp, " -- $(", 6); fp = variable_buffer_output (fp, r, l); fp = variable_buffer_output (fp, ")", 1); } } *fp = '\0'; /* If there is a leading dash, omit it. */ fp = variable_buffer; if (fp[0] == '-') ++fp; /* This used to use o_env, but that lost when a makefile defined MAKEFLAGS. Makefiles set MAKEFLAGS to add switches, but we still want to redefine its value with the full set of switches. Then we used o_file, but that lost when users added -e, causing a previous MAKEFLAGS env. var. to take precedence over the new one. Of course, an override or command definition will still take precedence. */ v = define_variable_cname (MAKEFLAGS_NAME, fp, env_overrides ? o_env_override : o_file, 1); v->special = 1; restore_variable_buffer (bufsave, lensave); return v; } /* Return 1 if the working directory change message should be printed. Otherwise, return 0. */ int should_print_dir (void) { if (print_directory_flag >= 0) return print_directory_flag; /* If the user didn't specify any print-directory options, compute the default setting: disable under -s / print in sub-makes and under -C. */ return !silent_flag && (makelevel > 0 || directories != NULL); } /* Print version information. */ static void print_version (void) { static int printed_version = 0; const char *precede = print_data_base_flag ? "# " : ""; if (printed_version) /* Do it only once. */ return; printf ("%sGNU Make %s\n", precede, version_string); if (!remote_description || *remote_description == '\0') printf (_("%sBuilt for %s\n"), precede, make_host); else printf (_("%sBuilt for %s (%s)\n"), precede, make_host, remote_description); #if MK_OS_W32 printf (_("%sANSI code page: %u\n"), precede, GetACP ()); printf (_("%sConsole code page: %u\n"), precede, GetConsoleOutputCP ()); #endif /* Print this untranslated. The coding standards recommend translating the (C) to the copyright symbol, but this string is going to change every year, and none of the rest of it should be translated (including the word "Copyright"), so it hardly seems worth it. */ printf ("%sCopyright (C) 1988-2025 Free Software Foundation, Inc.\n", precede); printf (_("%sLicense GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>\n\ %sThis is free software: you are free to change and redistribute it.\n\ %sThere is NO WARRANTY, to the extent permitted by law.\n"), precede, precede, precede); printed_version = 1; } /* Print a bunch of information about this and that. */ static void print_data_base (void) { int resolution; char buf[FILE_TIMESTAMP_PRINT_LEN_BOUND + 1]; file_timestamp_sprintf (buf, file_timestamp_now (&resolution)); print_version (); printf (_("\n# Make data base, printed on %s\n"), buf); print_variable_data_base (); print_dir_data_base (); print_rule_data_base (); print_file_data_base (); print_vpath_data_base (); strcache_print_stats ("#"); file_timestamp_sprintf (buf, file_timestamp_now (&resolution)); printf (_("\n# Finished Make data base on %s\n\n"), buf); } static void clean_jobserver (int status) { /* Sanity: have we written all our jobserver tokens back? If our exit status is 2 that means some kind of syntax error; we might not have written all our tokens so do that now. If tokens are left after any other error code, that's bad. */ if (jobserver_enabled() && jobserver_tokens) { if (status != 2) ON (error, NILF, "INTERNAL: exiting with %u jobserver tokens (should be 0)!", jobserver_tokens); else /* Don't write back the "free" token */ while (--jobserver_tokens) jobserver_release (0); } /* Sanity: If we're the master, were all the tokens written back? */ if (master_job_slots) { /* We didn't write one for ourself, so start at 1. */ unsigned int tokens = 1 + jobserver_acquire_all (); if (tokens != master_job_slots) ONN (error, NILF, "INTERNAL: exiting with %u jobserver tokens available; should be %u!", tokens, master_job_slots); } reset_jobserver (); } /* Exit with STATUS, cleaning up as necessary. */ void die (int status) { static char dying = 0; if (!dying) { int err; dying = 1; if (print_version_flag) print_version (); /* Get rid of a temp file from reading a makefile from stdin. */ temp_stdin_unlink (); /* Wait for children to die. */ err = (status != 0); while (job_slots_used > 0) reap_children (1, err); /* Let the remote job module clean up its state. */ remote_cleanup (); /* Remove the intermediate files. */ remove_intermediates (0); if (print_data_base_flag) print_data_base (); if (verify_flag) verify_file_data_base (); /* Unload plugins before jobserver integrity check in case a plugin participates in jobserver. */ unload_all (); clean_jobserver (status); if (output_context) { /* die() might be called in a recipe output context due to an $(error ...) function. */ output_close (output_context); if (output_context != &make_sync) output_close (&make_sync); OUTPUT_UNSET (); } output_close (NULL); osync_clear (); /* Try to move back to the original directory. This is essential on MS-DOS (where there is really only one process), and on Unix it puts core files in the original directory instead of the -C directory. Must wait until after remove_intermediates(), or unlinks of relative pathnames fail. */ if (directory_before_chdir != 0) { /* If it fails we don't care: shut up GCC. */ int _x UNUSED; _x = chdir (directory_before_chdir); } } exit (status); }