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libssh2
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acinclude.m4
1 118 строк
39 KB
Viktor Szakats
tidy-up: `FILE *` variable names, configure warning option guard, printf mask
15 июл 2026, 14:35
15 июл 2026, 14:35
952fb88
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dnl Copyright (C) The libssh2 project and its contributors. dnl SPDX-License-Identifier: BSD-3-Clause dnl CURL_CPP_P dnl dnl Check if $cpp -P should be used for extract define values due to gcc 5 dnl splitting up strings and defines between line outputs. gcc by default dnl (without -P) shows TEST EINVAL TEST as dnl dnl # 13 "conftest.c" dnl TEST dnl # 13 "conftest.c" 3 4 dnl 22 dnl # 13 "conftest.c" dnl TEST AC_DEFUN([CURL_CPP_P], [ AC_MSG_CHECKING([if cpp -P is needed]) AC_EGREP_CPP([TEST.*TEST], [ #include <errno.h> TEST EINVAL TEST ], [cpp=no], [cpp=yes]) AC_MSG_RESULT([$cpp]) dnl we need cpp -P so check if it works then if test "x$cpp" = "xyes"; then AC_MSG_CHECKING([if cpp -P works]) OLDCPPFLAGS=$CPPFLAGS CPPFLAGS="$CPPFLAGS -P" AC_EGREP_CPP([TEST.*TEST], [ #include <errno.h> TEST EINVAL TEST ], [cpp_p=yes], [cpp_p=no]) AC_MSG_RESULT([$cpp_p]) if test "x$cpp_p" = "xno"; then AC_MSG_WARN([failed to figure out cpp -P alternative]) # without -P CPPPFLAG="" else # with -P CPPPFLAG="-P" fi dnl restore CPPFLAGS CPPFLAGS=$OLDCPPFLAGS else # without -P CPPPFLAG="" fi ]) dnl CURL_CHECK_DEF (SYMBOL, [INCLUDES], [SILENT]) dnl ------------------------------------------------- dnl Use the C preprocessor to find out if the given object-style symbol dnl is defined and get its expansion. This macro does not use default dnl includes even if no INCLUDES argument is given. This macro runs dnl silently when invoked with three arguments. If the expansion would dnl result in a set of double-quoted strings the returned expansion is dnl actually a single double-quoted string concatenating all them. AC_DEFUN([CURL_CHECK_DEF], [ AC_REQUIRE([CURL_CPP_P]) OLDCPPFLAGS=$CPPFLAGS # CPPPFLAG comes from CURL_CPP_P CPPFLAGS="$CPPFLAGS $CPPPFLAG" AS_VAR_PUSHDEF([ac_HaveDef], [curl_cv_have_def_$1]) AS_VAR_PUSHDEF([ac_Def], [curl_cv_def_$1]) if test -z "$SED"; then AC_MSG_ERROR([SED not set. Cannot continue without SED being set.]) fi if test -z "$GREP"; then AC_MSG_ERROR([GREP not set. Cannot continue without GREP being set.]) fi ifelse($3,,[AC_MSG_CHECKING([for preprocessor definition of $1])]) tmp_exp="" AC_PREPROC_IFELSE([ AC_LANG_SOURCE( ifelse($2,,,[$2])[[ #ifdef $1 CURL_DEF_TOKEN $1 #endif ]]) ],[ tmp_exp=`eval "$ac_cpp conftest.$ac_ext" 2>/dev/null | \ "$GREP" CURL_DEF_TOKEN 2>/dev/null | \ "$SED" 's/.*CURL_DEF_TOKEN[[ ]][[ ]]*//' 2>/dev/null | \ "$SED" 's/[["]][[ ]]*[["]]//g' 2>/dev/null` if test -z "$tmp_exp" || test "$tmp_exp" = "$1"; then tmp_exp="" fi ]) if test -z "$tmp_exp"; then AS_VAR_SET(ac_HaveDef, no) ifelse($3,,[AC_MSG_RESULT([no])]) else AS_VAR_SET(ac_HaveDef, yes) AS_VAR_SET(ac_Def, $tmp_exp) ifelse($3,,[AC_MSG_RESULT([$tmp_exp])]) fi AS_VAR_POPDEF([ac_Def]) AS_VAR_POPDEF([ac_HaveDef]) CPPFLAGS=$OLDCPPFLAGS ]) dnl CURL_CHECK_COMPILER_CLANG dnl ------------------------------------------------- dnl Verify if compiler being used is clang. AC_DEFUN([CURL_CHECK_COMPILER_CLANG], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU_C]) AC_MSG_CHECKING([if compiler is clang]) CURL_CHECK_DEF([__clang__], [], [silent]) if test "$curl_cv_have_def___clang__" = "yes"; then AC_MSG_RESULT([yes]) AC_MSG_CHECKING([if compiler is xlclang]) CURL_CHECK_DEF([__ibmxl__], [], [silent]) if test "$curl_cv_have_def___ibmxl__" = "yes"; then dnl IBM's almost-compatible clang version AC_MSG_RESULT([yes]) compiler_id="XLCLANG" else AC_MSG_RESULT([no]) compiler_id="CLANG" fi flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4" flags_opt_yes="-O2" flags_opt_off="-O0" else AC_MSG_RESULT([no]) fi ]) dnl ********************************************************************** dnl CURL_DETECT_ICC ([ACTION-IF-YES]) dnl dnl check if this is the Intel ICC compiler, and if so run the ACTION-IF-YES dnl sets the $ICC variable to "yes" or "no" dnl ********************************************************************** AC_DEFUN([CURL_DETECT_ICC], [ ICC="no" AC_MSG_CHECKING([for icc in use]) if test "$GCC" = "yes"; then dnl check if this is icc acting as gcc in disguise AC_EGREP_CPP([^__INTEL_COMPILER], [__INTEL_COMPILER], dnl action if the text is found, this it has not been replaced by the dnl cpp ICC="no", dnl the text was not found, it was replaced by the cpp ICC="yes" AC_MSG_RESULT([yes]) [$1] ) fi if test "$ICC" = "no"; then # this is not ICC AC_MSG_RESULT([no]) fi ]) dnl We create a function for detecting which compiler we use and then set as dnl pedantic compiler options as possible for that particular compiler. The dnl options are only used for debug-builds. AC_DEFUN([CURL_CC_DEBUG_OPTS], [ if test "z$CLANG" = "z"; then CURL_CHECK_COMPILER_CLANG if test "z$compiler_id" = "zCLANG"; then CLANG="yes" else CLANG="no" fi fi if test "z$ICC" = "z"; then CURL_DETECT_ICC fi if test "$CLANG" = "yes"; then # indentation to match curl's m4/curl-compilers.m4 dnl figure out clang version! AC_MSG_CHECKING([compiler version]) fullclangver=`$CC -v 2>&1 | grep version` if echo $fullclangver | grep 'Apple' >/dev/null; then appleclang=1 else appleclang=0 fi clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'` if test -z "$clangver"; then clangver=`echo $fullclangver | "$SED" 's/.*version \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/'` oldapple=0 else oldapple=1 fi clangvhi=`echo $clangver | cut -d . -f1` clangvlo=`echo $clangver | cut -d . -f2` compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null` if test "$appleclang" = "1" && test "$oldapple" = "0"; then dnl Starting with Xcode 7 / clang 3.7, Apple clang does not tell its upstream version if test "$compiler_num" -ge '2604'; then compiler_num='2101' elif test "$compiler_num" -ge '1700'; then compiler_num='1901' elif test "$compiler_num" -ge '1600'; then compiler_num='1700' elif test "$compiler_num" -ge '1500'; then compiler_num='1600' elif test "$compiler_num" -ge '1400'; then compiler_num='1400' elif test "$compiler_num" -ge '1301'; then compiler_num='1300' elif test "$compiler_num" -ge '1300'; then compiler_num='1200' elif test "$compiler_num" -ge '1200'; then compiler_num='1000' elif test "$compiler_num" -ge '1100'; then compiler_num='800' elif test "$compiler_num" -ge '1000'; then compiler_num='600' elif test "$compiler_num" -ge '901'; then compiler_num='500' elif test "$compiler_num" -ge '900'; then compiler_num='400' elif test "$compiler_num" -ge '801'; then compiler_num='309' elif test "$compiler_num" -ge '703'; then compiler_num='308' else compiler_num='307' fi fi AC_MSG_RESULT([clang '$compiler_num' (raw: '$fullclangver' / '$clangver')]) if test "$compiler_num" -ge "302"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pedantic]) else tmp_CFLAGS="$tmp_CFLAGS -pedantic" fi if test "$want_werror" = "yes"; then LIBSSH2_CFLAG_EXTRAS="$LIBSSH2_CFLAG_EXTRAS -pedantic-errors" fi CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all extra]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shadow]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [nested-externs]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes]) tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare]) tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align]) tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shorten-64-to-32]) dnl Only clang 1.1 or later if test "$compiler_num" -ge "101"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused]) fi dnl Only clang 2.7 or later if test "$compiler_num" -ge "207"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [empty-body]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls]) # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used: It makes default case unusable CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits]) if test "x$have_windows_h" != "xyes"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros]) # Seen to clash with libtool-generated stub code fi CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter]) fi dnl Only clang 2.8 or later if test "$compiler_num" -ge "208"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [ignored-qualifiers]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla]) fi dnl Only clang 2.9 or later if test "$compiler_num" -ge "209"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion]) tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion" # FIXME CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow]) # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used: We cannot change public structs fi dnl Only clang 3.0 or later if test "$compiler_num" -ge "300"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conditional-uninitialized]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [language-extension-token]) tmp_CFLAGS="$tmp_CFLAGS -Wformat=2" fi dnl Only clang 3.1 or later if test "$compiler_num" -ge "301"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [format-non-iso]) fi dnl Only clang 3.2 or later if test "$compiler_num" -ge "302"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sometimes-uninitialized]) case $host_os in cygwin* | mingw*) dnl skip missing-variable-declarations warnings for Cygwin and dnl MinGW because the libtool wrapper executable causes them ;; *) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-variable-declarations]) ;; esac fi dnl Only clang 3.4 or later if test "$compiler_num" -ge "304"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [header-guard]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable]) fi dnl Only clang 3.5 or later if test "$compiler_num" -ge "305"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas]) # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code-break]) # Not used: Silent in "unity" builds fi dnl Only clang 3.6 or later if test "$compiler_num" -ge "306"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion]) fi dnl Only clang 3.9 or later if test "$compiler_num" -ge "309"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [comma]) dnl avoid the varargs warning, fixed in 4.0 dnl https://bugs.llvm.org/show_bug.cgi?id=29140 if test "$compiler_num" -lt "400"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-varargs" fi fi dnl clang 7 or later if test "$compiler_num" -ge "700"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [assign-enum]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [extra-semi-stmt]) fi dnl clang 10 or later if test "$compiler_num" -ge "1000"; then tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough" # we have silencing markup for clang 10.0 and above only CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [xor-used-as-pow]) fi dnl clang 13 or later if test "$compiler_num" -ge "1300"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-function-type]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [reserved-identifier]) # Keep it before -Wno-reserved-macro-identifier # tmp_CFLAGS="$tmp_CFLAGS -Wno-reserved-macro-identifier" # Sometimes such external macros need to be set fi dnl clang 16 or later #if test "$compiler_num" -ge "1600"; then # tmp_CFLAGS="$tmp_CFLAGS -Wno-unsafe-buffer-usage" #fi dnl clang 17 or later if test "$compiler_num" -ge "1700"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-function-type-strict]) # with Apple clang it requires 16.0 or above fi dnl clang 19 or later if test "$compiler_num" -ge "1901"; then tmp_CFLAGS="$tmp_CFLAGS -Wformat-signedness" fi dnl clang 20 or later if test "$compiler_num" -ge "2001"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [array-compare]) fi dnl clang 21 or later if test "$compiler_num" -ge "2101"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [c++-hidden-decl]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [implicit-int-enum-cast]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [jump-misses-init]) tmp_CFLAGS="$tmp_CFLAGS -Wno-implicit-void-ptr-cast" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [tentative-definition-compat]) if test "x$have_windows_h" = "xyes"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-c++-keyword" # `wchar_t` triggers it on Windows else CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [c++-keyword]) fi fi case "$CFLAGS" in *-std=c89*|*-std=c90*|*-std=gnu89*|*-std=gnu90*) if test "$compiler_num" -ge "309"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-comma" # Silly fi ;; esac CFLAGS="$CFLAGS $tmp_CFLAGS" AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS]) elif test "$GCC" = "yes"; then # indentation to match curl's m4/curl-compilers.m4 dnl figure out gcc version! AC_MSG_CHECKING([compiler version]) # strip '-suffix' parts, e.g. Ubuntu Windows cross-gcc returns '10-win32' gccver=`$CC -dumpversion | sed -E 's/-.+$//'` gccvhi=`echo $gccver | cut -d . -f1` if echo $gccver | grep -F "." >/dev/null; then gccvlo=`echo $gccver | cut -d . -f2` else gccvlo="0" fi compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null` AC_MSG_RESULT([gcc '$compiler_num' (raw: '$gccver')]) if test "$ICC" = "yes"; then dnl this is icc, not gcc. dnl ICC warnings we ignore: dnl * 269 warns on our "%Od" printf formatters for curl_off_t output: dnl "invalid format string conversion" dnl * 279 warns on static conditions in while expressions dnl * 981 warns on "operands are evaluated in unspecified order" dnl * 1418 "external definition with no prior declaration" dnl * 1419 warns on "external declaration in primary source file" dnl which we know and do on purpose. tmp_CFLAGS="-wd279,269,981,1418,1419" if test "$compiler_num" -gt "600"; then dnl icc 6.0 and older does not have the -Wall flag tmp_CFLAGS="-Wall $tmp_CFLAGS" fi else dnl $ICC = yes dnl this is a set of options we believe *ALL* gcc versions support: if test "$compiler_num" -ge "408"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pedantic]) else tmp_CFLAGS="$tmp_CFLAGS -pedantic" fi if test "$want_werror" = "yes"; then LIBSSH2_CFLAG_EXTRAS="$LIBSSH2_CFLAG_EXTRAS -pedantic-errors" fi dnl Set of options we believe *ALL* gcc versions support: CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all]) tmp_CFLAGS="$tmp_CFLAGS -W" dnl Only gcc 1.4 or later if test "$compiler_num" -ge "104"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings]) dnl If not cross-compiling with a gcc older than 3.0 if test "$cross_compiling" != "yes" || test "$compiler_num" -ge "300"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused shadow]) fi fi dnl Only gcc 2.7 or later if test "$compiler_num" -ge "207"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [nested-externs]) dnl If not cross-compiling with a gcc older than 3.0 if test "$cross_compiling" != "yes" || test "$compiler_num" -ge "300"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes]) fi fi dnl Only gcc 2.95 or later if test "$compiler_num" -ge "295"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [bad-function-cast]) fi dnl Only gcc 2.96 or later if test "$compiler_num" -ge "296"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal]) tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-compare]) dnl -Wundef used only if gcc is 2.96 or later since we get dnl lots of "`_POSIX_C_SOURCE' is not defined" in system dnl headers with gcc 2.95.4 on FreeBSD 4.9 CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef]) fi dnl Only gcc 3.0 or later if test "$compiler_num" -ge "300"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on dnl on i686-Linux as it gives us heaps with false positives. dnl Also, on gcc 4.0.X it is totally unbearable and complains all dnl over making it unusable for generic purposes. Let's not use it. tmp_CFLAGS="$tmp_CFLAGS" fi dnl Only gcc 3.3 or later if test "$compiler_num" -ge "303"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes]) fi dnl Only gcc 3.4 or later if test "$compiler_num" -ge "304"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [old-style-definition]) fi dnl Only gcc 4.0 or later if test "$compiler_num" -ge "400"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-qual]) tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3" fi dnl Only gcc 4.1 or later if test "$compiler_num" -ge "401"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [attributes]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [div-by-zero format-security]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-field-initializers]) case $host in *-*-msys*) ;; *) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-noreturn]) # Seen to clash with libtool-generated stub code ;; esac CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unreachable-code unused-parameter]) # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [padded]) # Not used: We cannot change public structs CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pragmas]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [redundant-decls]) # CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [switch-enum]) # Not used: It makes default case unusable CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-macros]) fi dnl Only gcc 4.2 or later if test "$compiler_num" -ge "402"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align]) fi dnl Only gcc 4.3 or later if test "$compiler_num" -ge "403"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [address]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion]) tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion" # FIXME CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla]) dnl required for -Warray-bounds, included in -Wall tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp" fi dnl Only gcc 4.4 or later if test "$compiler_num" -ge "404"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [logical-op]) fi dnl Only gcc 4.5 or later if test "$compiler_num" -ge "405"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [jump-misses-init]) dnl Only Windows targets case $host_os in cygwin*) dnl Silence warning in 'lt_fatal' libtool function tmp_CFLAGS="$tmp_CFLAGS -Wno-suggest-attribute=noreturn" ;; esac fi dnl Only gcc 4.6 or later if test "$compiler_num" -ge "406"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [trampolines]) fi dnl only gcc 4.8 or later if test "$compiler_num" -ge "408"; then tmp_CFLAGS="$tmp_CFLAGS -Wformat=2" fi dnl Only gcc 5 or later if test "$compiler_num" -ge "500"; then tmp_CFLAGS="$tmp_CFLAGS -Warray-bounds=2" tmp_CFLAGS="$tmp_CFLAGS -Wformat-signedness" fi dnl Only gcc 6 or later if test "$compiler_num" -ge "600"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-negative-value]) tmp_CFLAGS="$tmp_CFLAGS -Wshift-overflow=2" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [null-dereference]) tmp_CFLAGS="$tmp_CFLAGS -fdelete-null-pointer-checks" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-cond]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused-const-variable]) fi dnl Only gcc 7 or later if test "$compiler_num" -ge "700"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [duplicated-branches]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [restrict]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [alloc-zero]) tmp_CFLAGS="$tmp_CFLAGS -Wformat-overflow=2" tmp_CFLAGS="$tmp_CFLAGS -Wformat-truncation=2" tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough" fi dnl Only gcc 10 or later if test "$compiler_num" -ge "1000"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [arith-conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion]) fi dnl Only gcc 12 or later if test "$compiler_num" -ge "1200"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [array-compare]) fi dnl Only gcc 13 or later if test "$compiler_num" -ge "1300"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-int-mismatch]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [xor-used-as-pow]) fi dnl Only gcc 15 or later if test "$compiler_num" -ge "1500"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [leading-whitespace=spaces]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [trailing-whitespace=any]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unterminated-string-initialization]) fi fi dnl $ICC = no CFLAGS="$CFLAGS $tmp_CFLAGS" AC_MSG_NOTICE([Added this set of compiler options: $tmp_CFLAGS]) else dnl $GCC = yes AC_MSG_NOTICE([Added no extra compiler options]) fi dnl $GCC = yes dnl strip off optimizer flags NEWFLAGS="" for flag in $CFLAGS; do case "$flag" in -O*) dnl echo "cut off $flag" ;; *) NEWFLAGS="$NEWFLAGS $flag" ;; esac done CFLAGS=$NEWFLAGS ]) dnl end of AC_DEFUN() dnl CURL_CONVERT_INCLUDE_TO_ISYSTEM dnl ------------------------------------------------- dnl Changes standard include paths present in CFLAGS dnl and CPPFLAGS into isystem include paths. This is dnl done to prevent GNUC from generating warnings on dnl headers from these locations, although on ancient dnl GNUC versions these warnings are not silenced. AC_DEFUN([CURL_CONVERT_INCLUDE_TO_ISYSTEM], [ AC_REQUIRE([CURL_SHFUNC_SQUEEZE]) AC_REQUIRE([CURL_CHECK_COMPILER_CLANG]) AC_MSG_CHECKING([convert -I options to -isystem]) if test "$compiler_id" = "GNU_C" || test "$compiler_id" = "CLANG" || test "$compiler_id" = "APPLECLANG"; then AC_MSG_RESULT([yes]) tmp_has_include="no" tmp_chg_FLAGS="$CFLAGS" for word1 in $tmp_chg_FLAGS; do case "$word1" in -I*) tmp_has_include="yes" ;; esac done if test "$tmp_has_include" = "yes"; then tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'` tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'` CFLAGS="$tmp_chg_FLAGS" squeeze CFLAGS fi tmp_has_include="no" tmp_chg_FLAGS="$CPPFLAGS" for word1 in $tmp_chg_FLAGS; do case "$word1" in -I*) tmp_has_include="yes" ;; esac done if test "$tmp_has_include" = "yes"; then tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/^-I/ -isystem /g'` tmp_chg_FLAGS=`echo "$tmp_chg_FLAGS" | "$SED" 's/ -I/ -isystem /g'` CPPFLAGS="$tmp_chg_FLAGS" squeeze CPPFLAGS fi else AC_MSG_RESULT([no]) fi ]) dnl CURL_ADD_COMPILER_WARNINGS (WARNING-LIST, NEW-WARNINGS) dnl ------------------------------------------------------- dnl Contents of variable WARNING-LIST and NEW-WARNINGS are dnl handled as whitespace separated lists of words. dnl Add each compiler warning from NEW-WARNINGS that has not dnl been disabled via CFLAGS to WARNING-LIST. AC_DEFUN([CURL_ADD_COMPILER_WARNINGS], [ AC_REQUIRE([CURL_SHFUNC_SQUEEZE]) ac_var_added_warnings="" for warning in [$2]; do CURL_VAR_MATCH(CFLAGS, [-Wno-$warning -W$warning]) if test "$ac_var_match_word" = "no"; then ac_var_added_warnings="$ac_var_added_warnings -W$warning" fi done dnl squeeze whitespace out of result [$1]="$[$1] $ac_var_added_warnings" squeeze [$1] ]) dnl CURL_SHFUNC_SQUEEZE dnl ------------------------------------------------- dnl Declares a shell function squeeze() which removes dnl redundant whitespace out of a shell variable. AC_DEFUN([CURL_SHFUNC_SQUEEZE], [ squeeze() { _sqz_result="" eval _sqz_input=\[$][$]1 for _sqz_token in $_sqz_input; do if test -z "$_sqz_result"; then _sqz_result="$_sqz_token" else _sqz_result="$_sqz_result $_sqz_token" fi done eval [$]1=\$_sqz_result return 0 } ]) dnl CURL_VAR_MATCH (VARNAME, VALUE) dnl ------------------------------------------------- dnl Verifies if shell variable VARNAME contains VALUE. dnl Contents of variable VARNAME and VALUE are handled dnl as whitespace separated lists of words. If at least dnl one word of VALUE is present in VARNAME the match dnl is considered positive, otherwise false. AC_DEFUN([CURL_VAR_MATCH], [ ac_var_match_word="no" for word1 in $[$1]; do for word2 in [$2]; do if test "$word1" = "$word2"; then ac_var_match_word="yes" fi done done ]) dnl CURL_CHECK_NONBLOCKING_SOCKET dnl ------------------------------------------------- dnl Check for how to set a socket to non-blocking state. There seems to exist dnl four known different ways, with the one used almost everywhere being POSIX dnl and XPG3, while the other different ways for different systems (old BSD, dnl Windows and Amiga). dnl dnl There are two known platforms (AIX 3.x and SunOS 4.1.x) where the dnl O_NONBLOCK define is found but does not work. This condition is attempted dnl to get caught in this script by using an excessive number of #ifdefs... dnl AC_DEFUN([CURL_CHECK_NONBLOCKING_SOCKET], [ AC_MSG_CHECKING([non-blocking sockets style]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ /* headers for O_NONBLOCK test */ #include <sys/types.h> #include <unistd.h> #include <fcntl.h> ]], [[ /* try to compile O_NONBLOCK */ #if defined(sun) || defined(__sun__) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) # if defined(__SVR4) || defined(__srv4__) # define PLATFORM_SOLARIS # else # define PLATFORM_SUNOS4 # endif #endif #if (defined(_AIX) || defined(__xlC__)) && !defined(_AIX41) # define PLATFORM_AIX_V3 #endif #if defined(PLATFORM_SUNOS4) || defined(PLATFORM_AIX_V3) || defined(__BEOS__) #error "O_NONBLOCK does not work on this platform" #endif int socket; int flags = fcntl(socket, F_SETFL, flags | O_NONBLOCK); ]])],[ dnl the O_NONBLOCK test was fine nonblock="O_NONBLOCK" AC_DEFINE(HAVE_O_NONBLOCK, 1, [use O_NONBLOCK for non-blocking sockets]) ],[ dnl the code was bad, try a different program now, test 2 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ /* headers for FIONBIO test */ #include <unistd.h> #include <stropts.h> ]], [[ /* FIONBIO source test (old-style unix) */ int socket; int flags = ioctl(socket, FIONBIO, &flags); ]])],[ dnl FIONBIO test was good nonblock="FIONBIO" AC_DEFINE(HAVE_FIONBIO, 1, [use FIONBIO for non-blocking sockets]) ],[ dnl FIONBIO test was also bad dnl the code was bad, try a different program now, test 3 AC_LINK_IFELSE([AC_LANG_PROGRAM([[ /* headers for IoctlSocket test (Amiga?) */ #include <sys/ioctl.h> ]], [[ /* IoctlSocket source code */ int socket; int flags = IoctlSocket(socket, FIONBIO, (long)1); ]])],[ dnl ioctlsocket test was good nonblock="IoctlSocket" AC_DEFINE(HAVE_IOCTLSOCKET_CASE, 1, [use Ioctlsocket() for non-blocking sockets]) ],[ dnl Ioctlsocket did not compile, do test 4! AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ /* headers for SO_NONBLOCK test (BeOS) */ #include <socket.h> ]], [[ /* SO_NONBLOCK source code */ long b = 1; int socket; int flags = setsockopt(socket, SOL_SOCKET, SO_NONBLOCK, &b, sizeof(b)); ]])],[ dnl the SO_NONBLOCK test was good nonblock="SO_NONBLOCK" AC_DEFINE(HAVE_SO_NONBLOCK, 1, [use SO_NONBLOCK for non-blocking sockets]) ],[ dnl test 4 did not compile! nonblock="nada" ]) dnl end of forth test ]) dnl end of third test ]) dnl end of second test ]) dnl end of non-blocking try-compile test AC_MSG_RESULT($nonblock) if test "$nonblock" = "nada"; then AC_MSG_WARN([non-block sockets disabled]) fi ]) dnl CURL_CHECK_NEED_REENTRANT_SYSTEM dnl ------------------------------------------------- dnl Checks if the preprocessor _REENTRANT definition dnl must be unconditionally done for this platform. dnl Internal macro for CURL_CONFIGURE_REENTRANT. AC_DEFUN([CURL_CHECK_NEED_REENTRANT_SYSTEM], [ case $host in *-*-solaris* | *-*-hpux*) tmp_need_reentrant="yes" ;; *) tmp_need_reentrant="no" ;; esac ]) dnl CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT dnl ------------------------------------------------- dnl This macro ensures that configuration tests done dnl after this execute with preprocessor symbol dnl _REENTRANT defined. This macro also ensures that dnl the generated config file defines NEED_REENTRANT dnl and that in turn setup.h defines _REENTRANT. dnl Internal macro for CURL_CONFIGURE_REENTRANT. AC_DEFUN([CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT], [ AC_DEFINE(NEED_REENTRANT, 1, [Define to 1 if _REENTRANT preprocessor symbol must be defined.]) cat >>confdefs.h <<_EOF #ifndef _REENTRANT # define _REENTRANT #endif _EOF ]) dnl CURL_CONFIGURE_REENTRANT dnl ------------------------------------------------- dnl This first checks if the preprocessor _REENTRANT dnl symbol is already defined. If it is not currently dnl defined a set of checks are performed to verify dnl if its definition is required to make visible to dnl the compiler a set of *_r functions. Finally, if dnl _REENTRANT is already defined or needed it takes dnl care of making adjustments necessary to ensure dnl that it is defined equally for further configure dnl tests and generated config file. AC_DEFUN([CURL_CONFIGURE_REENTRANT], [ AC_PREREQ([2.50]) AC_MSG_CHECKING([if _REENTRANT is already defined]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ ]],[[ #ifdef _REENTRANT int dummy = 1; #else force compilation error #endif ]]) ],[ AC_MSG_RESULT([yes]) tmp_reentrant_initially_defined="yes" ],[ AC_MSG_RESULT([no]) tmp_reentrant_initially_defined="no" ]) if test "$tmp_reentrant_initially_defined" = "no"; then AC_MSG_CHECKING([if _REENTRANT is actually needed]) CURL_CHECK_NEED_REENTRANT_SYSTEM if test "$tmp_need_reentrant" = "yes"; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi fi AC_MSG_CHECKING([if _REENTRANT is onwards defined]) if test "$tmp_reentrant_initially_defined" = "yes" || test "$tmp_need_reentrant" = "yes"; then CURL_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi ]) dnl LIBSSH2_LIB_HAVE_LINKFLAGS dnl -------------------------- dnl Wrapper around LIBSSH2_HAVE_LINKFLAGS to also check $prefix/lib, if set. dnl dnl autoconf only checks $prefix/lib64 if gcc -print-search-dirs output dnl includes a directory named lib64. To find libraries in $prefix/lib dnl we append -L$prefix/lib to LDFLAGS before checking. dnl dnl For convenience, $4 is expanded if [lib]$1 is found. AC_DEFUN([LIBSSH2_LIB_HAVE_LINKFLAGS], [ libssh2_save_CPPFLAGS="$CPPFLAGS" libssh2_save_LDFLAGS="$LDFLAGS" if test "${with_lib$1_prefix+set}" = set -a "${with_lib$1_prefix}" != 'no'; then CPPFLAGS="$CPPFLAGS${CPPFLAGS:+ }-I${with_lib$1_prefix}/include" LDFLAGS="$LDFLAGS${LDFLAGS:+ }-L${with_lib$1_prefix}/lib" fi LIBSSH2_HAVE_LINKFLAGS([$1], [$2], [$3]) if test "$ac_cv_lib$1" = "yes"; then : $4 else CPPFLAGS="$libssh2_save_CPPFLAGS" LDFLAGS="$libssh2_save_LDFLAGS" fi ]) AC_DEFUN([LIBSSH2_CHECK_CRYPTO], [ if test "$use_crypto" = "auto" && test "$found_crypto" = "none" || test "$use_crypto" = "$1"; then m4_case([$1], [openssl], [ LIBSSH2_LIB_HAVE_LINKFLAGS([ssl], [crypto], [#include <openssl/opensslconf.h>], [ AC_DEFINE(LIBSSH2_OPENSSL, 1, [Use $1]) found_crypto="$1" found_crypto_str="OpenSSL" AC_MSG_CHECKING([for BoringSSL]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ #include <openssl/base.h> ]],[[ #ifndef OPENSSL_IS_BORINGSSL #error not BoringSSL #endif ]]) ],[ AC_MSG_RESULT([yes]) found_crypto_str="BoringSSL" OPENSSL_IS_BORINGSSL=1 ],[ AC_MSG_RESULT([no]) ]) if test "$OPENSSL_IS_BORINGSSL" != "1"; then dnl BoringSSL does not provide libcrypto.pc LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}libcrypto" fi ]) ], [wolfssl], [ LIBSSH2_LIB_HAVE_LINKFLAGS([wolfssl], [], [#include <wolfssl/options.h>], [ AC_DEFINE(LIBSSH2_WOLFSSL, 1, [Use $1]) LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}wolfssl" found_crypto="$1" ]) ], [libgcrypt], [ LIBSSH2_LIB_HAVE_LINKFLAGS([gcrypt], [], [#include <gcrypt.h>], [ AC_DEFINE(LIBSSH2_LIBGCRYPT, 1, [Use $1]) LIBSSH2_PC_REQUIRES_PRIVATE="$LIBSSH2_PC_REQUIRES_PRIVATE${LIBSSH2_PC_REQUIRES_PRIVATE:+,}libgcrypt" found_crypto="$1" ]) ], [mbedtls], [ LIBSSH2_LIB_HAVE_LINKFLAGS([mbedcrypto], [], [#include <mbedtls/version.h>], [ AC_DEFINE(LIBSSH2_MBEDTLS, 1, [Use $1]) found_crypto="$1" ]) ], [wincng], [ if test "x$have_windows_h" = "xyes"; then # Look for Windows Cryptography API: Next Generation LIBS="$LIBS -lcrypt32" # Check necessary for old-MinGW LIBSSH2_LIB_HAVE_LINKFLAGS([bcrypt], [], [ #include <windows.h> #include <bcrypt.h> ], [ AC_DEFINE(LIBSSH2_WINCNG, 1, [Use $1]) found_crypto="$1" found_crypto_str="Windows Cryptography API: Next Generation" ]) fi ], ) test "$found_crypto" = "none" && crypto_errors="${crypto_errors}No $1 crypto library found! " fi ]) dnl LIBSSH2_CHECK_OPTION_WERROR dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-werror or --disable-werror, and set dnl shell variable want_werror as appropriate. AC_DEFUN([LIBSSH2_CHECK_OPTION_WERROR], [ AC_BEFORE([$0],[LIBSSH2_CHECK_COMPILER]) AC_MSG_CHECKING([whether to enable compiler warnings as errors]) OPT_COMPILER_WERROR="default" AC_ARG_ENABLE(werror, AS_HELP_STRING([--enable-werror],[Enable compiler warnings as errors]) AS_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]), OPT_COMPILER_WERROR=$enableval) case "$OPT_COMPILER_WERROR" in no) dnl --disable-werror option used want_werror="no" ;; default) dnl configure option not specified want_werror="no" ;; *) dnl --enable-werror option used want_werror="yes" ;; esac AC_MSG_RESULT([$want_werror]) if test X"$want_werror" = Xyes; then LIBSSH2_CFLAG_EXTRAS="$LIBSSH2_CFLAG_EXTRAS -Werror" fi ])