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acinclude.m4
164 строки
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Paul Smith
Fix Debian bug #144306: pass target-specific variables into the environment
10 май 2002, 07:15
10 май 2002, 07:15
9052b52
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dnl acinclude.m4 -- Extra macros needed for GNU make. dnl dnl Automake will incorporate this into its generated aclocal.m4. dnl --------------------------------------------------------------------------- dnl Got this from the lynx 2.8 distribution. dnl by T.E.Dickey <dickey@clark.net> dnl and Jim Spath <jspath@mail.bcpl.lib.md.us> dnl and Philippe De Muyter <phdm@macqel.be> dnl dnl Created: 1997/1/28 dnl Updated: 1997/12/23 dnl --------------------------------------------------------------------------- dnl After checking for functions in the default $LIBS, make a further check dnl for the functions that are netlib-related (these aren't always in the dnl libc, etc., and have to be handled specially because there are conflicting dnl and broken implementations. dnl Common library requirements (in order): dnl -lresolv -lsocket -lnsl dnl -lnsl -lsocket dnl -lsocket dnl -lbsd AC_DEFUN([CF_NETLIBS],[ cf_test_netlibs=no AC_MSG_CHECKING(for network libraries) AC_CACHE_VAL(cf_cv_netlibs,[ AC_MSG_RESULT(working...) cf_cv_netlibs="" cf_test_netlibs=yes AC_CHECK_FUNCS(gethostname,,[ CF_RECHECK_FUNC(gethostname,nsl,cf_cv_netlibs,[ CF_RECHECK_FUNC(gethostname,socket,cf_cv_netlibs)])]) # # FIXME: sequent needs this library (i.e., -lsocket -linet -lnsl), but # I don't know the entrypoints - 97/7/22 TD AC_CHECK_LIB(inet,main,cf_cv_netlibs="-linet $cf_cv_netlibs") # if test "$ac_cv_func_lsocket" != no ; then AC_CHECK_FUNCS(socket,,[ CF_RECHECK_FUNC(socket,socket,cf_cv_netlibs,[ CF_RECHECK_FUNC(socket,bsd,cf_cv_netlibs)])]) fi # AC_CHECK_FUNCS(gethostbyname,,[ CF_RECHECK_FUNC(gethostbyname,nsl,cf_cv_netlibs)]) # AC_CHECK_FUNCS(strcasecmp,,[ CF_RECHECK_FUNC(strcasecmp,resolv,cf_cv_netlibs)]) ]) LIBS="$LIBS $cf_cv_netlibs" test $cf_test_netlibs = no && echo "$cf_cv_netlibs" >&AC_FD_MSG ])dnl dnl --------------------------------------------------------------------------- dnl Re-check on a function to see if we can pick it up by adding a library. dnl $1 = function to check dnl $2 = library to check in dnl $3 = environment to update (e.g., $LIBS) dnl $4 = what to do if this fails dnl dnl This uses 'unset' if the shell happens to support it, but leaves the dnl configuration variable set to 'unknown' if not. This is a little better dnl than the normal autoconf test, which gives misleading results if a test dnl for the function is made (e.g., with AC_CHECK_FUNC) after this macro is dnl used (autoconf does not distinguish between a null token and one that is dnl set to 'no'). AC_DEFUN([CF_RECHECK_FUNC],[ AC_CHECK_LIB($2,$1,[ CF_UPPER(cf_tr_func,$1) AC_DEFINE_UNQUOTED(HAVE_$cf_tr_func,1,[Define if you have function $1]) ac_cv_func_$1=yes $3="-l$2 [$]$3"],[ ac_cv_func_$1=unknown unset ac_cv_func_$1 2>/dev/null $4], [[$]$3]) ])dnl dnl --------------------------------------------------------------------------- dnl Make an uppercase version of a variable dnl $1=uppercase($2) AC_DEFUN([CF_UPPER], [ changequote(,)dnl $1=`echo $2 | tr '[a-z]' '[A-Z]'` changequote([,])dnl ])dnl dnl --------------------------------------------------------------------------- dnl From Paul Eggert <eggert@twinsun.com> AC_DEFUN(AC_STRUCT_ST_MTIM_NSEC, [AC_CACHE_CHECK([for nanoseconds field of struct stat.st_mtim], ac_cv_struct_st_mtim_nsec, [ac_save_CPPFLAGS="$CPPFLAGS" ac_cv_struct_st_mtim_nsec=no # tv_nsec -- the usual case # _tv_nsec -- Solaris 2.6, if # (defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1 # && !defined __EXTENSIONS__) # st__tim.tv_nsec -- UnixWare 2.1.2 for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val" AC_TRY_COMPILE([#include <sys/types.h> #include <sys/stat.h>], [struct stat s; s.st_mtim.ST_MTIM_NSEC;], [ac_cv_struct_st_mtim_nsec=$ac_val; break]) done CPPFLAGS="$ac_save_CPPFLAGS"]) if test $ac_cv_struct_st_mtim_nsec != no; then AC_DEFINE_UNQUOTED(ST_MTIM_NSEC, $ac_cv_struct_st_mtim_nsec, [Define if 'struct stat' contains a nanoseconds field]) fi ] ) dnl --------------------------------------------------------------------------- dnl This will be in the next version of autoconf; take this out then! # make_FUNC_SETVBUF_REVERSED # ------------------------ AC_DEFUN([make_FUNC_SETVBUF_REVERSED], [AC_REQUIRE([AC_C_PROTOTYPES])dnl AC_CACHE_CHECK(whether setvbuf arguments are reversed, ac_cv_func_setvbuf_reversed, [ac_cv_func_setvbuf_reversed=no AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <stdio.h> # if PROTOTYPES int (setvbuf) (FILE *, int, char *, size_t); # endif]], [[char buf; return setvbuf (stdout, _IOLBF, &buf, 1);]])], [AC_LINK_IFELSE( [AC_LANG_PROGRAM( [[#include <stdio.h> # if PROTOTYPES int (setvbuf) (FILE *, int, char *, size_t); # endif]], [[char buf; return setvbuf (stdout, &buf, _IOLBF, 1);]])], [# It compiles and links either way, so it must not be declared # with a prototype and most likely this is a K&R C compiler. # Try running it. AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#include <stdio.h>]], [[/* This call has the arguments reversed. A reversed system may check and see that the address of buf is not _IOLBF, _IONBF, or _IOFBF, and return nonzero. */ char buf; if (setvbuf (stdout, _IOLBF, &buf, 1) != 0) exit (1); putchar ('\r'); exit (0); /* Non-reversed systems SEGV here. */]])], ac_cv_func_setvbuf_reversed=yes, rm -f core core.* *.core, [[: # Assume setvbuf is not reversed when cross-compiling.]])] ac_cv_func_setvbuf_reversed=yes)])]) if test $ac_cv_func_setvbuf_reversed = yes; then AC_DEFINE(SETVBUF_REVERSED, 1, [Define to 1 if the `setvbuf' function takes the buffering type as its second argument and the buffer pointer as the third, as on System V before release 3.]) fi ])# make_FUNC_SETVBUF_REVERSED