#*************************************************************************** # _ _ ____ _ # Project ___| | | | _ \| | # / __| | | | |_) | | # | (__| |_| | _ <| |___ # \___|\___/|_| \_\_____| # # Copyright (C) Daniel Stenberg, , et al. # # This software is licensed as described in the file COPYING, which # you should have received as part of this distribution. The terms # are also available at https://curl.se/docs/copyright.html. # # You may opt to use, copy, modify, merge, publish, distribute and/or sell # copies of the Software, and permit persons to whom the Software is # furnished to do so, under the terms of the COPYING file. # # This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY # KIND, either express or implied. # # SPDX-License-Identifier: curl # #*************************************************************************** # File version for 'aclocal' use. Keep it a single number. # serial 67 dnl CURL_CHECK_COMPILER dnl ------------------------------------------------- dnl Verify if the C compiler being used is known. AC_DEFUN([CURL_CHECK_COMPILER], [ # compiler_id="unknown" compiler_num="0" # flags_dbg_yes="unknown" flags_opt_all="unknown" flags_opt_yes="unknown" flags_opt_off="unknown" # flags_prefer_cppflags="no" # CURL_CHECK_COMPILER_DEC_C CURL_CHECK_COMPILER_HPUX_C CURL_CHECK_COMPILER_IBM_C CURL_CHECK_COMPILER_INTEL_C CURL_CHECK_COMPILER_CLANG CURL_CHECK_COMPILER_GNU_C CURL_CHECK_COMPILER_LCC CURL_CHECK_COMPILER_SGI_MIPSPRO_C CURL_CHECK_COMPILER_SGI_MIPS_C CURL_CHECK_COMPILER_SUNPRO_C CURL_CHECK_COMPILER_TINY_C # if test "$compiler_id" = "unknown"; then cat <<_EOF 1>&2 *** *** Warning: This configure script does not have information about the *** compiler you are using, relative to the flags required to enable or *** disable generation of debug info, optimization options or warnings. *** *** Whatever settings are present in CFLAGS will be used for this run. *** *** If you wish to help the curl project to better support your compiler *** you can report this and the required info on the libcurl development *** mailing list: https://lists.haxx.selistinfo/curl-library/ *** _EOF fi ]) dnl CURL_CHECK_COMPILER_CLANG dnl ------------------------------------------------- dnl Verify if compiler being used is clang. AC_DEFUN([CURL_CHECK_COMPILER_CLANG], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU_C])dnl AC_MSG_CHECKING([if compiler is clang]) CURL_CHECK_DEF([__clang__], [], [silent]) if test "$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 "$curl_cv_have_def___ibmxl__" = "yes" ; then dnl IBM's almost-compatible clang version AC_MSG_RESULT([yes]) compiler_id="XLCLANG" else AC_MSG_RESULT([no]) compiler_id="CLANG" fi fullclangver=`$CC -v 2>&1 | grep version` clangver=`echo $fullclangver | grep "based on LLVM " | "$SED" 's/.*(based on LLVM \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*)/\1/'` if test -z "$clangver"; then if echo $fullclangver | grep "Apple LLVM version " >/dev/null; then dnl Starting with XCode 7 / clang 3.7, Apple clang won't tell its upstream version clangver="3.7" else clangver=`echo $fullclangver | "$SED" 's/.*version \(@<:@0-9@:>@*\.@<:@0-9@:>@*\).*/\1/'` fi fi clangvhi=`echo $clangver | cut -d . -f1` clangvlo=`echo $clangver | cut -d . -f2` compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null` flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4" flags_opt_yes="-O2" flags_opt_off="-O0" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_DEC_C dnl ------------------------------------------------- dnl Verify if compiler being used is DEC C. AC_DEFUN([CURL_CHECK_COMPILER_DEC_C], [ AC_MSG_CHECKING([if compiler is DEC/Compaq/HP C]) CURL_CHECK_DEF([__DECC], [], [silent]) CURL_CHECK_DEF([__DECC_VER], [], [silent]) if test "$curl_cv_have_def___DECC" = "yes" && test "$curl_cv_have_def___DECC_VER" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="DEC_C" flags_dbg_yes="-g2" flags_opt_all="-O -O0 -O1 -O2 -O3 -O4" flags_opt_yes="-O1" flags_opt_off="-O0" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_GNU_C dnl ------------------------------------------------- dnl Verify if compiler being used is GNU C dnl dnl $compiler_num will be set to MAJOR * 100 + MINOR for gcc less than version dnl 7 and just $MAJOR * 100 for gcc version 7 and later. dnl dnl Examples: dnl Version 1.2.3 => 102 dnl Version 2.95 => 295 dnl Version 4.7 => 407 dnl Version 9.2.1 => 900 dnl AC_DEFUN([CURL_CHECK_COMPILER_GNU_C], [ AC_REQUIRE([CURL_CHECK_COMPILER_INTEL_C])dnl AC_REQUIRE([CURL_CHECK_COMPILER_CLANG])dnl AC_MSG_CHECKING([if compiler is GNU C]) CURL_CHECK_DEF([__GNUC__], [], [silent]) if test "$curl_cv_have_def___GNUC__" = "yes" && test "$compiler_id" = "unknown"; then AC_MSG_RESULT([yes]) compiler_id="GNU_C" gccver=`$CC -dumpversion` gccvhi=`echo $gccver | cut -d . -f1` gccvlo=`echo $gccver | cut -d . -f2` compiler_num=`(expr $gccvhi "*" 100 + $gccvlo) 2>/dev/null` flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -O3 -Os -Og -Ofast" flags_opt_yes="-O2" flags_opt_off="-O0" CURL_CHECK_DEF([_WIN32], [], [silent]) else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_HPUX_C dnl ------------------------------------------------- dnl Verify if compiler being used is HP-UX C. AC_DEFUN([CURL_CHECK_COMPILER_HPUX_C], [ AC_MSG_CHECKING([if compiler is HP-UX C]) CURL_CHECK_DEF([__HP_cc], [], [silent]) if test "$curl_cv_have_def___HP_cc" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="HP_UX_C" flags_dbg_yes="-g" flags_opt_all="-O +O0 +O1 +O2 +O3 +O4" flags_opt_yes="+O2" flags_opt_off="+O0" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_IBM_C dnl ------------------------------------------------- dnl Verify if compiler being used is IBM C. AC_DEFUN([CURL_CHECK_COMPILER_IBM_C], [ AC_MSG_CHECKING([if compiler is IBM C]) CURL_CHECK_DEF([__IBMC__], [], [silent]) if test "$curl_cv_have_def___IBMC__" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="IBM_C" flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -O3 -O4 -O5" flags_opt_all="$flags_opt_all -qnooptimize" flags_opt_all="$flags_opt_all -qoptimize=0" flags_opt_all="$flags_opt_all -qoptimize=1" flags_opt_all="$flags_opt_all -qoptimize=2" flags_opt_all="$flags_opt_all -qoptimize=3" flags_opt_all="$flags_opt_all -qoptimize=4" flags_opt_all="$flags_opt_all -qoptimize=5" flags_opt_yes="-O2" flags_opt_off="-qnooptimize" flags_prefer_cppflags="yes" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_INTEL_C dnl ------------------------------------------------- dnl Verify if compiler being used is Intel C. AC_DEFUN([CURL_CHECK_COMPILER_INTEL_C], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER_GNU_C])dnl AC_MSG_CHECKING([if compiler is Intel C]) CURL_CHECK_DEF([__INTEL_COMPILER], [], [silent]) if test "$curl_cv_have_def___INTEL_COMPILER" = "yes"; then AC_MSG_RESULT([yes]) compiler_num="$curl_cv_def___INTEL_COMPILER" CURL_CHECK_DEF([__unix__], [], [silent]) if test "$curl_cv_have_def___unix__" = "yes"; then compiler_id="INTEL_UNIX_C" flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -O3 -Os" flags_opt_yes="-O2" flags_opt_off="-O0" else compiler_id="INTEL_WINDOWS_C" flags_dbg_yes="/Zi /Oy-" flags_opt_all="/O /O0 /O1 /O2 /O3 /Od /Og /Og- /Oi /Oi-" flags_opt_yes="/O2" flags_opt_off="/Od" fi else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_LCC dnl ------------------------------------------------- dnl Verify if compiler being used is LCC. AC_DEFUN([CURL_CHECK_COMPILER_LCC], [ AC_MSG_CHECKING([if compiler is LCC]) CURL_CHECK_DEF([__LCC__], [], [silent]) if test "$curl_cv_have_def___LCC__" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="LCC" flags_dbg_yes="-g" flags_opt_all="" flags_opt_yes="" flags_opt_off="" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_SGI_MIPS_C dnl ------------------------------------------------- dnl Verify if compiler being used is SGI MIPS C. AC_DEFUN([CURL_CHECK_COMPILER_SGI_MIPS_C], [ AC_REQUIRE([CURL_CHECK_COMPILER_SGI_MIPSPRO_C])dnl AC_MSG_CHECKING([if compiler is SGI MIPS C]) CURL_CHECK_DEF([__GNUC__], [], [silent]) CURL_CHECK_DEF([__sgi], [], [silent]) if test "$curl_cv_have_def___GNUC__" = "no" && test "$curl_cv_have_def___sgi" = "yes" && test "$compiler_id" = "unknown"; then AC_MSG_RESULT([yes]) compiler_id="SGI_MIPS_C" flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast" flags_opt_yes="-O2" flags_opt_off="-O0" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_SGI_MIPSPRO_C dnl ------------------------------------------------- dnl Verify if compiler being used is SGI MIPSpro C. AC_DEFUN([CURL_CHECK_COMPILER_SGI_MIPSPRO_C], [ AC_BEFORE([$0],[CURL_CHECK_COMPILER_SGI_MIPS_C])dnl AC_MSG_CHECKING([if compiler is SGI MIPSpro C]) CURL_CHECK_DEF([__GNUC__], [], [silent]) CURL_CHECK_DEF([_COMPILER_VERSION], [], [silent]) CURL_CHECK_DEF([_SGI_COMPILER_VERSION], [], [silent]) if test "$curl_cv_have_def___GNUC__" = "no" && (test "$curl_cv_have_def__SGI_COMPILER_VERSION" = "yes" || test "$curl_cv_have_def__COMPILER_VERSION" = "yes"); then AC_MSG_RESULT([yes]) compiler_id="SGI_MIPSPRO_C" flags_dbg_yes="-g" flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast" flags_opt_yes="-O2" flags_opt_off="-O0" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_SUNPRO_C dnl ------------------------------------------------- dnl Verify if compiler being used is SunPro C. AC_DEFUN([CURL_CHECK_COMPILER_SUNPRO_C], [ AC_MSG_CHECKING([if compiler is SunPro C]) CURL_CHECK_DEF([__SUNPRO_C], [], [silent]) if test "$curl_cv_have_def___SUNPRO_C" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="SUNPRO_C" flags_dbg_yes="-g" flags_opt_all="-O -xO -xO1 -xO2 -xO3 -xO4 -xO5" flags_opt_yes="-xO2" flags_opt_off="" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_TINY_C dnl ------------------------------------------------- dnl Verify if compiler being used is Tiny C. AC_DEFUN([CURL_CHECK_COMPILER_TINY_C], [ AC_MSG_CHECKING([if compiler is Tiny C]) CURL_CHECK_DEF([__TINYC__], [], [silent]) if test "$curl_cv_have_def___TINYC__" = "yes"; then AC_MSG_RESULT([yes]) compiler_id="TINY_C" flags_dbg_yes="-g" flags_opt_all="" flags_opt_yes="" flags_opt_off="" else AC_MSG_RESULT([no]) fi ]) 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])dnl AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_MSG_CHECKING([convert -I options to -isystem]) if test "$compiler_id" = "GNU_C" || test "$compiler_id" = "CLANG"; 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_COMPILER_WORKS_IFELSE ([ACTION-IF-WORKS], [ACTION-IF-NOT-WORKS]) dnl ------------------------------------------------- dnl Verify if the C compiler seems to work with the dnl settings that are 'active' at the time the test dnl is performed. AC_DEFUN([CURL_COMPILER_WORKS_IFELSE], [ dnl compilation capability verification tmp_compiler_works="unknown" AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ ]],[[ int i = 1; return i; ]]) ],[ tmp_compiler_works="yes" ],[ tmp_compiler_works="no" echo " " >&6 sed 's/^/cc-fail: /' conftest.err >&6 echo " " >&6 ]) dnl linking capability verification if test "$tmp_compiler_works" = "yes"; then AC_LINK_IFELSE([ AC_LANG_PROGRAM([[ ]],[[ int i = 1; return i; ]]) ],[ tmp_compiler_works="yes" ],[ tmp_compiler_works="no" echo " " >&6 sed 's/^/link-fail: /' conftest.err >&6 echo " " >&6 ]) fi dnl only do runtime verification when not cross-compiling if test "x$cross_compiling" != "xyes" && test "$tmp_compiler_works" = "yes"; then CURL_RUN_IFELSE([ AC_LANG_PROGRAM([[ # ifdef __STDC__ # include # endif ]],[[ int i = 0; exit(i); ]]) ],[ tmp_compiler_works="yes" ],[ tmp_compiler_works="no" echo " " >&6 echo "run-fail: test program exited with status $ac_status" >&6 echo " " >&6 ]) fi dnl branch upon test result if test "$tmp_compiler_works" = "yes"; then ifelse($1,,:,[$1]) ifelse($2,,,[else $2]) fi ]) dnl CURL_SET_COMPILER_BASIC_OPTS dnl ------------------------------------------------- dnl Sets compiler specific options/flags which do not dnl depend on configure's debug, optimize or warnings dnl options. AC_DEFUN([CURL_SET_COMPILER_BASIC_OPTS], [ AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl # if test "$compiler_id" != "unknown"; then # tmp_save_CPPFLAGS="$CPPFLAGS" tmp_save_CFLAGS="$CFLAGS" tmp_CPPFLAGS="" tmp_CFLAGS="" # case "$compiler_id" in # CLANG) # dnl Disable warnings for unused arguments, otherwise clang will dnl warn about compile-time arguments used during link-time, like dnl -O and -g and -pedantic. tmp_CFLAGS="$tmp_CFLAGS -Qunused-arguments" dnl Disable pointer to bool conversion warnings since they cause dnl lib/securetransp.c cause several warnings for checks we want. tmp_CFLAGS="$tmp_CFLAGS -Wno-pointer-bool-conversion" ;; # DEC_C) # dnl Select strict ANSI C compiler mode tmp_CFLAGS="$tmp_CFLAGS -std1" dnl Turn off optimizer ANSI C aliasing rules tmp_CFLAGS="$tmp_CFLAGS -noansi_alias" dnl Generate warnings for missing function prototypes tmp_CFLAGS="$tmp_CFLAGS -warnprotos" dnl Change some warnings into fatal errors tmp_CFLAGS="$tmp_CFLAGS -msg_fatal toofewargs,toomanyargs" ;; # GNU_C) # dnl turn implicit-function-declaration warning into error, dnl at least gcc 2.95 and later support this if test "$compiler_num" -ge "295"; then tmp_CFLAGS="$tmp_CFLAGS -Werror-implicit-function-declaration" fi ;; # HP_UX_C) # dnl Disallow run-time dereferencing of null pointers tmp_CFLAGS="$tmp_CFLAGS -z" dnl Disable some remarks dnl #4227: padding struct with n bytes to align member dnl #4255: padding size of struct with n bytes to alignment boundary tmp_CFLAGS="$tmp_CFLAGS +W 4227,4255" ;; # IBM_C) # dnl Ensure that compiler optimizations are always thread-safe. tmp_CPPFLAGS="$tmp_CPPFLAGS -qthreaded" dnl Disable type based strict aliasing optimizations, using worst dnl case aliasing assumptions when compiling. Type based aliasing dnl would restrict the lvalues that could be safely used to access dnl a data object. tmp_CPPFLAGS="$tmp_CPPFLAGS -qnoansialias" dnl Force compiler to stop after the compilation phase, without dnl generating an object code file when compilation has errors. tmp_CPPFLAGS="$tmp_CPPFLAGS -qhalt=e" ;; # INTEL_UNIX_C) # dnl On unix this compiler uses gcc's header files, so dnl we select ANSI C89 dialect plus GNU extensions. tmp_CFLAGS="$tmp_CFLAGS -std=gnu89" dnl Change some warnings into errors dnl #140: too many arguments in function call dnl #147: declaration is incompatible with 'previous one' dnl #165: too few arguments in function call dnl #266: function declared implicitly tmp_CPPFLAGS="$tmp_CPPFLAGS -diag-error 140,147,165,266" dnl Disable some remarks dnl #279: controlling expression is constant dnl #981: operands are evaluated in unspecified order dnl #1025: zero extending result of unary operation dnl #1469: "cc" clobber ignored dnl #2259: non-pointer conversion from X to Y may lose significant bits tmp_CPPFLAGS="$tmp_CPPFLAGS -diag-disable 279,981,1025,1469,2259" ;; # INTEL_WINDOWS_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # LCC) # dnl Disallow run-time dereferencing of null pointers tmp_CFLAGS="$tmp_CFLAGS -n" ;; # SGI_MIPS_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # SGI_MIPSPRO_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # SUNPRO_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # TINY_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # esac # squeeze tmp_CPPFLAGS squeeze tmp_CFLAGS # if test ! -z "$tmp_CFLAGS" || test ! -z "$tmp_CPPFLAGS"; then AC_MSG_CHECKING([if compiler accepts some basic options]) CPPFLAGS="$tmp_save_CPPFLAGS $tmp_CPPFLAGS" CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS" squeeze CPPFLAGS squeeze CFLAGS CURL_COMPILER_WORKS_IFELSE([ AC_MSG_RESULT([yes]) AC_MSG_NOTICE([compiler options added: $tmp_CFLAGS $tmp_CPPFLAGS]) ],[ AC_MSG_RESULT([no]) AC_MSG_WARN([compiler options rejected: $tmp_CFLAGS $tmp_CPPFLAGS]) dnl restore initial settings CPPFLAGS="$tmp_save_CPPFLAGS" CFLAGS="$tmp_save_CFLAGS" ]) fi # fi ]) dnl CURL_SET_COMPILER_DEBUG_OPTS dnl ------------------------------------------------- dnl Sets compiler specific options/flags which depend dnl on configure's debug option. AC_DEFUN([CURL_SET_COMPILER_DEBUG_OPTS], [ AC_REQUIRE([CURL_CHECK_OPTION_DEBUG])dnl AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl # if test "$compiler_id" != "unknown"; then # tmp_save_CFLAGS="$CFLAGS" tmp_save_CPPFLAGS="$CPPFLAGS" # tmp_options="" tmp_CFLAGS="$CFLAGS" tmp_CPPFLAGS="$CPPFLAGS" # if test "$want_debug" = "yes"; then AC_MSG_CHECKING([if compiler accepts debug enabling options]) tmp_options="$flags_dbg_yes" fi # if test "$flags_prefer_cppflags" = "yes"; then CPPFLAGS="$tmp_CPPFLAGS $tmp_options" CFLAGS="$tmp_CFLAGS" else CPPFLAGS="$tmp_CPPFLAGS" CFLAGS="$tmp_CFLAGS $tmp_options" fi squeeze CPPFLAGS squeeze CFLAGS fi ]) dnl CURL_SET_COMPILER_OPTIMIZE_OPTS dnl ------------------------------------------------- dnl Sets compiler specific options/flags which depend dnl on configure's optimize option. AC_DEFUN([CURL_SET_COMPILER_OPTIMIZE_OPTS], [ AC_REQUIRE([CURL_CHECK_OPTION_OPTIMIZE])dnl AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl # if test "$compiler_id" != "unknown"; then # tmp_save_CFLAGS="$CFLAGS" tmp_save_CPPFLAGS="$CPPFLAGS" # tmp_options="" tmp_CFLAGS="$CFLAGS" tmp_CPPFLAGS="$CPPFLAGS" honor_optimize_option="yes" # dnl If optimization request setting has not been explicitly specified, dnl it has been derived from the debug setting and initially assumed. dnl This initially assumed optimizer setting will finally be ignored dnl if CFLAGS or CPPFLAGS already hold optimizer flags. This implies dnl that an initially assumed optimizer setting might not be honored. # if test "$want_optimize" = "assume_no" || test "$want_optimize" = "assume_yes"; then AC_MSG_CHECKING([if compiler optimizer assumed setting might be used]) CURL_VAR_MATCH_IFELSE([tmp_CFLAGS],[$flags_opt_all],[ honor_optimize_option="no" ]) CURL_VAR_MATCH_IFELSE([tmp_CPPFLAGS],[$flags_opt_all],[ honor_optimize_option="no" ]) AC_MSG_RESULT([$honor_optimize_option]) if test "$honor_optimize_option" = "yes"; then if test "$want_optimize" = "assume_yes"; then want_optimize="yes" fi if test "$want_optimize" = "assume_no"; then want_optimize="no" fi fi fi # if test "$honor_optimize_option" = "yes"; then CURL_VAR_STRIP([tmp_CFLAGS],[$flags_opt_all]) CURL_VAR_STRIP([tmp_CPPFLAGS],[$flags_opt_all]) if test "$want_optimize" = "yes"; then AC_MSG_CHECKING([if compiler accepts optimizer enabling options]) tmp_options="$flags_opt_yes" fi if test "$want_optimize" = "no"; then AC_MSG_CHECKING([if compiler accepts optimizer disabling options]) tmp_options="$flags_opt_off" fi if test "$flags_prefer_cppflags" = "yes"; then CPPFLAGS="$tmp_CPPFLAGS $tmp_options" CFLAGS="$tmp_CFLAGS" else CPPFLAGS="$tmp_CPPFLAGS" CFLAGS="$tmp_CFLAGS $tmp_options" fi squeeze CPPFLAGS squeeze CFLAGS CURL_COMPILER_WORKS_IFELSE([ AC_MSG_RESULT([yes]) AC_MSG_NOTICE([compiler options added: $tmp_options]) ],[ AC_MSG_RESULT([no]) AC_MSG_WARN([compiler options rejected: $tmp_options]) dnl restore initial settings CPPFLAGS="$tmp_save_CPPFLAGS" CFLAGS="$tmp_save_CFLAGS" ]) fi # fi ]) dnl CURL_SET_COMPILER_WARNING_OPTS dnl ------------------------------------------------- dnl Sets compiler options/flags which depend on dnl configure's warnings given option. AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [ AC_REQUIRE([CURL_CHECK_OPTION_WARNINGS])dnl AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl # if test "$compiler_id" != "unknown"; then # tmp_save_CPPFLAGS="$CPPFLAGS" tmp_save_CFLAGS="$CFLAGS" tmp_CPPFLAGS="" tmp_CFLAGS="" # case "$compiler_id" in # CLANG) # if test "$want_warnings" = "yes"; then tmp_CFLAGS="$tmp_CFLAGS -pedantic" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all extra]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shadow]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [inline nested-externs]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-declarations]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-prototypes]) tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [float-equal]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [no-multichar sign-compare]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [undef]) tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [endif-labels strict-prototypes]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [declaration-after-statement]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [cast-align]) tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shorten-64-to-32]) # dnl Only clang 1.1 or later if test "$compiler_num" -ge "101"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unused]) fi # dnl Only clang 2.8 or later if test "$compiler_num" -ge "208"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla]) fi # dnl Only clang 2.9 or later if test "$compiler_num" -ge "209"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [shift-sign-overflow]) fi # dnl Only clang 3.2 or later if test "$compiler_num" -ge "302"; then case $host_os in cygwin* | mingw*) dnl skip missing-variable-declarations warnings for cygwin and dnl mingw because the libtool wrapper executable causes them ;; *) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-variable-declarations]) ;; esac fi # dnl Only clang 3.6 or later if test "$compiler_num" -ge "306"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion]) fi # dnl Only clang 3.9 or later if test "$compiler_num" -ge "309"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [comma]) # avoid the varargs warning, fixed in 4.0 # https://bugs.llvm.org/show_bug.cgi?id=29140 if test "$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 fi ;; # DEC_C) # if test "$want_warnings" = "yes"; then dnl Select a higher warning level than default level2 tmp_CFLAGS="$tmp_CFLAGS -msg_enable level3" fi ;; # GNU_C) # if test "$want_warnings" = "yes"; then tmp_CFLAGS="$tmp_CFLAGS -std=gnu89" # dnl Do not enable -pedantic when cross-compiling with a gcc older dnl than 3.0, to avoid warnings from third party system headers. if test "x$cross_compiling" != "xyes" || test "$compiler_num" -ge "300"; then tmp_CFLAGS="$tmp_CFLAGS -pedantic" fi # dnl Set of options we believe *ALL* gcc versions support: CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all]) tmp_CFLAGS="$tmp_CFLAGS -W" # dnl Only gcc 1.4 or later if test "$compiler_num" -ge "104"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [pointer-arith write-strings]) dnl If not cross-compiling with a gcc older than 3.0 if test "x$cross_compiling" != "xyes" || 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], [inline nested-externs]) dnl If not cross-compiling with a gcc older than 3.0 if test "x$cross_compiling" != "xyes" || test "$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 2.97 or later if test "$compiler_num" -ge "297"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral" fi # dnl Only gcc 3.0 or later if test "$compiler_num" -ge "300"; then dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on dnl on i686-Linux as it gives us heaps with false positives. dnl Also, on gcc 4.0.X it is totally unbearable and complains all dnl over making it unusable for generic purposes. Let's not use it. tmp_CFLAGS="$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 "$compiler_num" -ge "400"; then tmp_CFLAGS="$tmp_CFLAGS -Wstrict-aliasing=3" 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], [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]) tmp_CFLAGS="$tmp_CFLAGS -Wno-sign-conversion" CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla]) dnl required for -Warray-bounds, included in -Wall tmp_CFLAGS="$tmp_CFLAGS -ftree-vrp" fi # dnl Only gcc 4.5 or later if test "$compiler_num" -ge "405"; then dnl Only windows targets if test "$curl_cv_have_def__WIN32" = "yes"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-pedantic-ms-format" fi fi # dnl Only gcc 4.6 or later if test "$compiler_num" -ge "406"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion]) 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" 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" if test "$compiler_num" -lt "1200"; then dnl gcc 12 doesn't acknowledge our comment markups tmp_CFLAGS="$tmp_CFLAGS -Wimplicit-fallthrough=4" fi fi # dnl Only gcc 10 or later if test "$compiler_num" -ge "1000"; then CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [arith-conversion]) CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [enum-conversion]) fi # fi # dnl Do not issue warnings for code in system include paths. if test "$compiler_num" -ge "300"; then tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" else dnl When cross-compiling with a gcc older than 3.0, disable dnl some warnings triggered on third party system headers. if test "x$cross_compiling" = "xyes"; then if test "$compiler_num" -ge "104"; then dnl gcc 1.4 or later tmp_CFLAGS="$tmp_CFLAGS -Wno-unused -Wno-shadow" fi if test "$compiler_num" -ge "207"; then dnl gcc 2.7 or later tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-declarations" tmp_CFLAGS="$tmp_CFLAGS -Wno-missing-prototypes" fi fi fi ;; # HP_UX_C) # if test "$want_warnings" = "yes"; then dnl Issue all warnings tmp_CFLAGS="$tmp_CFLAGS +w1" fi ;; # IBM_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # INTEL_UNIX_C) # if test "$want_warnings" = "yes"; then if test "$compiler_num" -gt "600"; then dnl Show errors, warnings, and remarks tmp_CPPFLAGS="$tmp_CPPFLAGS -Wall -w2" dnl Perform extra compile-time code checking tmp_CPPFLAGS="$tmp_CPPFLAGS -Wcheck" dnl Warn on nested comments tmp_CPPFLAGS="$tmp_CPPFLAGS -Wcomment" dnl Show warnings relative to deprecated features tmp_CPPFLAGS="$tmp_CPPFLAGS -Wdeprecated" dnl Enable warnings for missing prototypes tmp_CPPFLAGS="$tmp_CPPFLAGS -Wmissing-prototypes" dnl Enable warnings for 64-bit portability issues tmp_CPPFLAGS="$tmp_CPPFLAGS -Wp64" dnl Enable warnings for questionable pointer arithmetic tmp_CPPFLAGS="$tmp_CPPFLAGS -Wpointer-arith" dnl Check for function return typw issues tmp_CPPFLAGS="$tmp_CPPFLAGS -Wreturn-type" dnl Warn on variable declarations hiding a previous one tmp_CPPFLAGS="$tmp_CPPFLAGS -Wshadow" dnl Warn when a variable is used before initialized tmp_CPPFLAGS="$tmp_CPPFLAGS -Wuninitialized" dnl Warn if a declared function is not used tmp_CPPFLAGS="$tmp_CPPFLAGS -Wunused-function" fi fi dnl Disable using EBP register in optimizations tmp_CFLAGS="$tmp_CFLAGS -fno-omit-frame-pointer" dnl Disable use of ANSI C aliasing rules in optimizations tmp_CFLAGS="$tmp_CFLAGS -fno-strict-aliasing" dnl Value-safe optimizations on floating-point data tmp_CFLAGS="$tmp_CFLAGS -fp-model precise" ;; # INTEL_WINDOWS_C) # dnl Placeholder tmp_CFLAGS="$tmp_CFLAGS" ;; # LCC) # if test "$want_warnings" = "yes"; then dnl Highest warning level is double -A, next is single -A. dnl Due to the big number of warnings these trigger on third dnl party header files it is impractical for us to use any of dnl them here. If you want them simply define it in CPPFLAGS. tmp_CFLAGS="$tmp_CFLAGS" fi ;; # SGI_MIPS_C) # if test "$want_warnings" = "yes"; then dnl Perform stricter semantic and lint-like checks tmp_CFLAGS="$tmp_CFLAGS -fullwarn" fi ;; # SGI_MIPSPRO_C) # if test "$want_warnings" = "yes"; then dnl Perform stricter semantic and lint-like checks tmp_CFLAGS="$tmp_CFLAGS -fullwarn" dnl Disable some remarks dnl #1209: controlling expression is constant tmp_CFLAGS="$tmp_CFLAGS -woff 1209" fi ;; # SUNPRO_C) # if test "$want_warnings" = "yes"; then dnl Perform stricter semantic and lint-like checks tmp_CFLAGS="$tmp_CFLAGS -v" fi ;; # TINY_C) # if test "$want_warnings" = "yes"; then dnl Activate all warnings CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [all]) dnl Make string constants be of type const char * CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [write-strings]) dnl Warn use of unsupported GCC features ignored by TCC CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [unsupported]) fi ;; # esac # squeeze tmp_CPPFLAGS squeeze tmp_CFLAGS # if test ! -z "$tmp_CFLAGS" || test ! -z "$tmp_CPPFLAGS"; then AC_MSG_CHECKING([if compiler accepts strict warning options]) CPPFLAGS="$tmp_save_CPPFLAGS $tmp_CPPFLAGS" CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS" squeeze CPPFLAGS squeeze CFLAGS CURL_COMPILER_WORKS_IFELSE([ AC_MSG_RESULT([yes]) AC_MSG_NOTICE([compiler options added: $tmp_CFLAGS $tmp_CPPFLAGS]) ],[ AC_MSG_RESULT([no]) AC_MSG_WARN([compiler options rejected: $tmp_CFLAGS $tmp_CPPFLAGS]) dnl restore initial settings CPPFLAGS="$tmp_save_CPPFLAGS" CFLAGS="$tmp_save_CFLAGS" ]) fi # fi ]) 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_CHECK_CURLDEBUG dnl ------------------------------------------------- dnl Settings which depend on configure's curldebug given dnl option, and other additional configure pre-requisites. dnl Actually the curl debug memory tracking feature can dnl only be used/enabled when libcurl is built as a static dnl library or as a shared one on those systems on which dnl shared libraries support undefined symbols. AC_DEFUN([CURL_CHECK_CURLDEBUG], [ AC_REQUIRE([XC_LIBTOOL])dnl AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl supports_curldebug="unknown" if test "$want_curldebug" = "yes"; then if test "x$enable_shared" != "xno" && test "x$enable_shared" != "xyes"; then AC_MSG_WARN([unknown enable_shared setting.]) supports_curldebug="no" fi if test "x$enable_static" != "xno" && test "x$enable_static" != "xyes"; then AC_MSG_WARN([unknown enable_static setting.]) supports_curldebug="no" fi if test "$supports_curldebug" != "no"; then if test "$enable_shared" = "yes" && test "x$xc_lt_shlib_use_no_undefined" = 'xyes'; then supports_curldebug="no" AC_MSG_WARN([shared library does not support undefined symbols.]) fi fi fi # if test "$want_curldebug" = "yes"; then AC_MSG_CHECKING([if curl debug memory tracking can be enabled]) test "$supports_curldebug" = "no" || supports_curldebug="yes" AC_MSG_RESULT([$supports_curldebug]) if test "$supports_curldebug" = "no"; then AC_MSG_WARN([cannot enable curl debug memory tracking.]) want_curldebug="no" fi fi ]) dnl CURL_CHECK_COMPILER_HALT_ON_ERROR dnl ------------------------------------------------- dnl Verifies if the compiler actually halts after the dnl compilation phase without generating any object dnl code file, when the source compiles with errors. AC_DEFUN([CURL_CHECK_COMPILER_HALT_ON_ERROR], [ AC_MSG_CHECKING([if compiler halts on compilation errors]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ ]],[[ force compilation error ]]) ],[ AC_MSG_RESULT([no]) AC_MSG_ERROR([compiler does not halt on compilation errors.]) ],[ AC_MSG_RESULT([yes]) ]) ]) dnl CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE dnl ------------------------------------------------- dnl Verifies if the compiler actually halts after the dnl compilation phase without generating any object dnl code file, when the source code tries to define a dnl type for a constant array with negative dimension. AC_DEFUN([CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE], [ AC_REQUIRE([CURL_CHECK_COMPILER_HALT_ON_ERROR])dnl AC_MSG_CHECKING([if compiler halts on negative sized arrays]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ typedef char bad_t[sizeof(char) == sizeof(int) ? -1 : -1 ]; ]],[[ bad_t dummy; ]]) ],[ AC_MSG_RESULT([no]) AC_MSG_ERROR([compiler does not halt on negative sized arrays.]) ],[ AC_MSG_RESULT([yes]) ]) ]) dnl CURL_CHECK_COMPILER_STRUCT_MEMBER_SIZE dnl ------------------------------------------------- dnl Verifies if the compiler is capable of handling the dnl size of a struct member, struct which is a function dnl result, as a compilation-time condition inside the dnl type definition of a constant array. AC_DEFUN([CURL_CHECK_COMPILER_STRUCT_MEMBER_SIZE], [ AC_REQUIRE([CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE])dnl AC_MSG_CHECKING([if compiler struct member size checking works]) tst_compiler_check_one_works="unknown" AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ struct mystruct { int mi; char mc; struct mystruct *next; }; struct mystruct myfunc(); typedef char good_t1[sizeof(myfunc().mi) == sizeof(int) ? 1 : -1 ]; typedef char good_t2[sizeof(myfunc().mc) == sizeof(char) ? 1 : -1 ]; ]],[[ good_t1 dummy1; good_t2 dummy2; ]]) ],[ tst_compiler_check_one_works="yes" ],[ tst_compiler_check_one_works="no" sed 's/^/cc-src: /' conftest.$ac_ext >&6 sed 's/^/cc-err: /' conftest.err >&6 ]) tst_compiler_check_two_works="unknown" AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ struct mystruct { int mi; char mc; struct mystruct *next; }; struct mystruct myfunc(); typedef char bad_t1[sizeof(myfunc().mi) != sizeof(int) ? 1 : -1 ]; typedef char bad_t2[sizeof(myfunc().mc) != sizeof(char) ? 1 : -1 ]; ]],[[ bad_t1 dummy1; bad_t2 dummy2; ]]) ],[ tst_compiler_check_two_works="no" ],[ tst_compiler_check_two_works="yes" ]) if test "$tst_compiler_check_one_works" = "yes" && test "$tst_compiler_check_two_works" = "yes"; then AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) AC_MSG_ERROR([compiler fails struct member size checking.]) fi ]) dnl CURL_CHECK_COMPILER_SYMBOL_HIDING dnl ------------------------------------------------- dnl Verify if compiler supports hiding library internal symbols, setting dnl shell variable supports_symbol_hiding value as appropriate, as well as dnl variables symbol_hiding_CFLAGS and symbol_hiding_EXTERN when supported. AC_DEFUN([CURL_CHECK_COMPILER_SYMBOL_HIDING], [ AC_REQUIRE([CURL_CHECK_COMPILER])dnl AC_BEFORE([$0],[CURL_CONFIGURE_SYMBOL_HIDING])dnl AC_MSG_CHECKING([if compiler supports hiding library internal symbols]) supports_symbol_hiding="no" symbol_hiding_CFLAGS="" symbol_hiding_EXTERN="" tmp_CFLAGS="" tmp_EXTERN="" case "$compiler_id" in CLANG) dnl All versions of clang support -fvisibility= tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))" tmp_CFLAGS="-fvisibility=hidden" supports_symbol_hiding="yes" ;; GNU_C) dnl Only gcc 3.4 or later if test "$compiler_num" -ge "304"; then if $CC --help --verbose 2>/dev/null | grep fvisibility= >/dev/null ; then tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))" tmp_CFLAGS="-fvisibility=hidden" supports_symbol_hiding="yes" fi fi ;; INTEL_UNIX_C) dnl Only icc 9.0 or later if test "$compiler_num" -ge "900"; then if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then tmp_save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS -fvisibility=hidden" AC_LINK_IFELSE([ AC_LANG_PROGRAM([[ # include ]],[[ printf("icc fvisibility bug test"); ]]) ],[ tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))" tmp_CFLAGS="-fvisibility=hidden" supports_symbol_hiding="yes" ]) CFLAGS="$tmp_save_CFLAGS" fi fi ;; SUNPRO_C) if $CC 2>&1 | grep flags >/dev/null && $CC -flags | grep xldscope= >/dev/null ; then tmp_EXTERN="__global" tmp_CFLAGS="-xldscope=hidden" supports_symbol_hiding="yes" fi ;; esac if test "$supports_symbol_hiding" = "yes"; then tmp_save_CFLAGS="$CFLAGS" CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS" squeeze CFLAGS AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ $tmp_EXTERN char *dummy(char *buff); char *dummy(char *buff) { if(buff) return ++buff; else return buff; } ]],[[ char b[16]; char *r = dummy(&b[0]); if(r) return (int)*r; ]]) ],[ supports_symbol_hiding="yes" if test -f conftest.err; then grep 'visibility' conftest.err >/dev/null if test "$?" -eq "0"; then supports_symbol_hiding="no" fi fi ],[ supports_symbol_hiding="no" echo " " >&6 sed 's/^/cc-src: /' conftest.$ac_ext >&6 sed 's/^/cc-err: /' conftest.err >&6 echo " " >&6 ]) CFLAGS="$tmp_save_CFLAGS" fi if test "$supports_symbol_hiding" = "yes"; then AC_MSG_RESULT([yes]) symbol_hiding_CFLAGS="$tmp_CFLAGS" symbol_hiding_EXTERN="$tmp_EXTERN" else AC_MSG_RESULT([no]) fi ]) dnl CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH dnl ------------------------------------------------- dnl Verifies if the compiler actually halts after the dnl compilation phase without generating any object dnl code file, when the source code tries to redefine dnl a prototype which does not match previous one. AC_DEFUN([CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH], [ AC_REQUIRE([CURL_CHECK_COMPILER_HALT_ON_ERROR])dnl AC_MSG_CHECKING([if compiler halts on function prototype mismatch]) AC_COMPILE_IFELSE([ AC_LANG_PROGRAM([[ # include int rand(int n); int rand(int n) { if(n) return ++n; else return n; } ]],[[ int i[2]={0,0}; int j = rand(i[0]); if(j) return j; ]]) ],[ AC_MSG_RESULT([no]) AC_MSG_ERROR([compiler does not halt on function prototype mismatch.]) ],[ AC_MSG_RESULT([yes]) ]) ]) 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_VAR_MATCH_IFELSE (VARNAME, VALUE, dnl [ACTION-IF-MATCH], [ACTION-IF-NOT-MATCH]) dnl ------------------------------------------------- dnl This performs a CURL_VAR_MATCH check and executes dnl first branch if the match is positive, otherwise dnl the second branch is executed. AC_DEFUN([CURL_VAR_MATCH_IFELSE], [ CURL_VAR_MATCH([$1],[$2]) if test "$ac_var_match_word" = "yes"; then ifelse($3,,:,[$3]) ifelse($4,,,[else $4]) fi ]) dnl CURL_VAR_STRIP (VARNAME, VALUE) dnl ------------------------------------------------- dnl Contents of variable VARNAME and VALUE are handled dnl as whitespace separated lists of words. Each word dnl from VALUE is removed from VARNAME when present. AC_DEFUN([CURL_VAR_STRIP], [ AC_REQUIRE([CURL_SHFUNC_SQUEEZE])dnl ac_var_stripped="" for word1 in $[$1]; do ac_var_strip_word="no" for word2 in [$2]; do if test "$word1" = "$word2"; then ac_var_strip_word="yes" fi done if test "$ac_var_strip_word" = "no"; then ac_var_stripped="$ac_var_stripped $word1" fi done dnl squeeze whitespace out of result [$1]="$ac_var_stripped" squeeze [$1] ]) 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])dnl 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] ])