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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/c-ares/m4/cares-compilers.m4 | |
parent | Initial commit. (diff) | |
download | ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/c-ares/m4/cares-compilers.m4 | 1587 |
1 files changed, 1587 insertions, 0 deletions
diff --git a/src/c-ares/m4/cares-compilers.m4 b/src/c-ares/m4/cares-compilers.m4 new file mode 100644 index 000000000..2b98a6886 --- /dev/null +++ b/src/c-ares/m4/cares-compilers.m4 @@ -0,0 +1,1587 @@ +#*************************************************************************** +# +# Copyright (C) 2009-2013 by Daniel Stenberg et al +# +# Permission to use, copy, modify, and distribute this software and its +# documentation for any purpose and without fee is hereby granted, provided +# that the above copyright notice appear in all copies and that both that +# copyright notice and this permission notice appear in supporting +# documentation, and that the name of M.I.T. not be used in advertising or +# publicity pertaining to distribution of the software without specific, +# written prior permission. M.I.T. makes no representations about the +# suitability of this software for any purpose. It is provided "as is" +# without express or implied warranty. +# +#*************************************************************************** + +# File version for 'aclocal' use. Keep it a single number. +# serial 75 + + +dnl CARES_CHECK_COMPILER +dnl ------------------------------------------------- +dnl Verify if the C compiler being used is known. + +AC_DEFUN([CARES_CHECK_COMPILER], [ + # + compiler_id="unknown" + compiler_num="0" + # + flags_dbg_all="unknown" + flags_dbg_yes="unknown" + flags_dbg_off="unknown" + flags_opt_all="unknown" + flags_opt_yes="unknown" + flags_opt_off="unknown" + # + flags_prefer_cppflags="no" + # + CARES_CHECK_COMPILER_DEC_C + CARES_CHECK_COMPILER_HPUX_C + CARES_CHECK_COMPILER_IBM_C + CARES_CHECK_COMPILER_INTEL_C + CARES_CHECK_COMPILER_CLANG + CARES_CHECK_COMPILER_GNU_C + CARES_CHECK_COMPILER_LCC + CARES_CHECK_COMPILER_SGI_MIPSPRO_C + CARES_CHECK_COMPILER_SGI_MIPS_C + CARES_CHECK_COMPILER_SUNPRO_C + CARES_CHECK_COMPILER_TINY_C + CARES_CHECK_COMPILER_WATCOM_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 c-ares project to better support your compiler +*** you can report this and the required info on the c-ares development +*** mailing list: http://cool.haxx.se/mailman/listinfo/c-ares/ +*** +_EOF + fi +]) + + +dnl CARES_CHECK_COMPILER_CLANG +dnl ------------------------------------------------- +dnl Verify if compiler being used is clang. + +AC_DEFUN([CARES_CHECK_COMPILER_CLANG], [ + AC_BEFORE([$0],[CARES_CHECK_COMPILER_GNU_C])dnl + AC_MSG_CHECKING([if compiler is clang]) + CURL_CHECK_DEF([__clang__], [], [silent]) + if test "$curl_cv_have_def___clang__" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="CLANG" + clangver=`$CC -dumpversion` + clangvhi=`echo $clangver | cut -d . -f1` + clangvlo=`echo $clangver | cut -d . -f2` + compiler_num=`(expr $clangvhi "*" 100 + $clangvlo) 2>/dev/null` + flags_dbg_all="-g -g0 -g1 -g2 -g3" + flags_dbg_all="$flags_dbg_all -ggdb" + flags_dbg_all="$flags_dbg_all -gstabs" + flags_dbg_all="$flags_dbg_all -gstabs+" + flags_dbg_all="$flags_dbg_all -gcoff" + flags_dbg_all="$flags_dbg_all -gxcoff" + flags_dbg_all="$flags_dbg_all -gdwarf-2" + flags_dbg_all="$flags_dbg_all -gvms" + flags_dbg_yes="-g" + flags_dbg_off="-g0" + flags_opt_all="-O -O0 -O1 -O2 -Os -O3 -O4" + flags_opt_yes="-Os" + flags_opt_off="-O0" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_DEC_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is DEC C. + +AC_DEFUN([CARES_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_all="-g -g0 -g1 -g2 -g3" + flags_dbg_yes="-g2" + flags_dbg_off="-g0" + flags_opt_all="-O -O0 -O1 -O2 -O3 -O4" + flags_opt_yes="-O1" + flags_opt_off="-O0" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_GNU_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is GNU C. + +AC_DEFUN([CARES_CHECK_COMPILER_GNU_C], [ + AC_REQUIRE([CARES_CHECK_COMPILER_INTEL_C])dnl + AC_REQUIRE([CARES_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 + $gccvlo) 2>/dev/null` + flags_dbg_all="-g -g0 -g1 -g2 -g3" + flags_dbg_all="$flags_dbg_all -ggdb" + flags_dbg_all="$flags_dbg_all -gstabs" + flags_dbg_all="$flags_dbg_all -gstabs+" + flags_dbg_all="$flags_dbg_all -gcoff" + flags_dbg_all="$flags_dbg_all -gxcoff" + flags_dbg_all="$flags_dbg_all -gdwarf-2" + flags_dbg_all="$flags_dbg_all -gvms" + flags_dbg_yes="-g" + flags_dbg_off="-g0" + flags_opt_all="-O -O0 -O1 -O2 -O3 -Os" + flags_opt_yes="-O2" + flags_opt_off="-O0" + CURL_CHECK_DEF([_WIN32], [], [silent]) + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_HPUX_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is HP-UX C. + +AC_DEFUN([CARES_CHECK_COMPILER_HPUX_C], [ + AC_MSG_CHECKING([if compiler is HP-UX C]) + CURL_CHECK_DEF([__HP_cc], [], [silent]) + if test "$curl_cv_have_def___HP_cc" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="HP_UX_C" + flags_dbg_all="-g -s" + flags_dbg_yes="-g" + flags_dbg_off="-s" + flags_opt_all="-O +O0 +O1 +O2 +O3 +O4" + flags_opt_yes="+O2" + flags_opt_off="+O0" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_IBM_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is IBM C. + +AC_DEFUN([CARES_CHECK_COMPILER_IBM_C], [ + AC_MSG_CHECKING([if compiler is IBM C]) + CURL_CHECK_DEF([__IBMC__], [], [silent]) + if test "$curl_cv_have_def___IBMC__" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="IBM_C" + flags_dbg_all="-g -g0 -g1 -g2 -g3" + flags_dbg_yes="-g" + flags_dbg_off="" + 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 CARES_CHECK_COMPILER_INTEL_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is Intel C. + +AC_DEFUN([CARES_CHECK_COMPILER_INTEL_C], [ + AC_BEFORE([$0],[CARES_CHECK_COMPILER_GNU_C])dnl + AC_MSG_CHECKING([if compiler is Intel C]) + CURL_CHECK_DEF([__INTEL_COMPILER], [], [silent]) + if test "$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_all="-g -g0" + flags_dbg_yes="-g" + flags_dbg_off="-g0" + 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_all="/ZI /Zi /zI /zi /ZD /Zd /zD /zd /Z7 /z7 /Oy /Oy-" + flags_dbg_all="$flags_dbg_all /debug" + flags_dbg_all="$flags_dbg_all /debug:none" + flags_dbg_all="$flags_dbg_all /debug:minimal" + flags_dbg_all="$flags_dbg_all /debug:partial" + flags_dbg_all="$flags_dbg_all /debug:full" + flags_dbg_all="$flags_dbg_all /debug:semantic_stepping" + flags_dbg_all="$flags_dbg_all /debug:extended" + flags_dbg_yes="/Zi /Oy-" + flags_dbg_off="/debug:none /Oy-" + flags_opt_all="/O /O0 /O1 /O2 /O3 /Od /Og /Og- /Oi /Oi-" + flags_opt_yes="/O2" + flags_opt_off="/Od" + fi + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_LCC +dnl ------------------------------------------------- +dnl Verify if compiler being used is LCC. + +AC_DEFUN([CARES_CHECK_COMPILER_LCC], [ + AC_MSG_CHECKING([if compiler is LCC]) + CURL_CHECK_DEF([__LCC__], [], [silent]) + if test "$curl_cv_have_def___LCC__" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="LCC" + flags_dbg_all="-g" + flags_dbg_yes="-g" + flags_dbg_off="" + flags_opt_all="" + flags_opt_yes="" + flags_opt_off="" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_SGI_MIPS_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is SGI MIPS C. + +AC_DEFUN([CARES_CHECK_COMPILER_SGI_MIPS_C], [ + AC_REQUIRE([CARES_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_all="-g -g0 -g1 -g2 -g3" + flags_dbg_yes="-g" + flags_dbg_off="-g0" + flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast" + flags_opt_yes="-O2" + flags_opt_off="-O0" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_SGI_MIPSPRO_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is SGI MIPSpro C. + +AC_DEFUN([CARES_CHECK_COMPILER_SGI_MIPSPRO_C], [ + AC_BEFORE([$0],[CARES_CHECK_COMPILER_SGI_MIPS_C])dnl + AC_MSG_CHECKING([if compiler is SGI MIPSpro C]) + CURL_CHECK_DEF([__GNUC__], [], [silent]) + CURL_CHECK_DEF([_COMPILER_VERSION], [], [silent]) + CURL_CHECK_DEF([_SGI_COMPILER_VERSION], [], [silent]) + if test "$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_all="-g -g0 -g1 -g2 -g3" + flags_dbg_yes="-g" + flags_dbg_off="-g0" + flags_opt_all="-O -O0 -O1 -O2 -O3 -Ofast" + flags_opt_yes="-O2" + flags_opt_off="-O0" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_SUNPRO_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is SunPro C. + +AC_DEFUN([CARES_CHECK_COMPILER_SUNPRO_C], [ + AC_MSG_CHECKING([if compiler is SunPro C]) + CURL_CHECK_DEF([__SUNPRO_C], [], [silent]) + if test "$curl_cv_have_def___SUNPRO_C" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="SUNPRO_C" + flags_dbg_all="-g -s" + flags_dbg_yes="-g" + flags_dbg_off="-s" + flags_opt_all="-O -xO -xO1 -xO2 -xO3 -xO4 -xO5" + flags_opt_yes="-xO2" + flags_opt_off="" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_TINY_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is Tiny C. + +AC_DEFUN([CARES_CHECK_COMPILER_TINY_C], [ + AC_MSG_CHECKING([if compiler is Tiny C]) + CURL_CHECK_DEF([__TINYC__], [], [silent]) + if test "$curl_cv_have_def___TINYC__" = "yes"; then + AC_MSG_RESULT([yes]) + compiler_id="TINY_C" + flags_dbg_all="-g -b" + flags_dbg_yes="-g" + flags_dbg_off="" + flags_opt_all="" + flags_opt_yes="" + flags_opt_off="" + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_CHECK_COMPILER_WATCOM_C +dnl ------------------------------------------------- +dnl Verify if compiler being used is Watcom C. + +AC_DEFUN([CARES_CHECK_COMPILER_WATCOM_C], [ + AC_MSG_CHECKING([if compiler is Watcom C]) + CURL_CHECK_DEF([__WATCOMC__], [], [silent]) + if test "$curl_cv_have_def___WATCOMC__" = "yes"; then + AC_MSG_RESULT([yes]) + CURL_CHECK_DEF([__UNIX__], [], [silent]) + if test "$curl_cv_have_def___UNIX__" = "yes"; then + compiler_id="WATCOM_UNIX_C" + flags_dbg_all="-g1 -g1+ -g2 -g3" + flags_dbg_yes="-g2" + flags_dbg_off="" + flags_opt_all="-O0 -O1 -O2 -O3" + flags_opt_yes="-O2" + flags_opt_off="-O0" + else + compiler_id="WATCOM_WINDOWS_C" + flags_dbg_all="" + flags_dbg_yes="" + flags_dbg_off="" + flags_opt_all="" + flags_opt_yes="" + flags_opt_off="" + fi + else + AC_MSG_RESULT([no]) + fi +]) + + +dnl CARES_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([CARES_CONVERT_INCLUDE_TO_ISYSTEM], [ + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + if test "$compiler_id" = "GNU_C" || + test "$compiler_id" = "CLANG"; then + 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 + fi +]) + + +dnl CARES_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([CARES_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 + AC_RUN_IFELSE([ + AC_LANG_PROGRAM([[ +# ifdef __STDC__ +# include <stdlib.h> +# 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 + $2]) + fi +]) + + +dnl CARES_SET_COMPILER_BASIC_OPTS +dnl ------------------------------------------------- +dnl Sets compiler specific options/flags which do not +dnl depend on configure's debug, optimize or warnings +dnl options. + +AC_DEFUN([CARES_SET_COMPILER_BASIC_OPTS], [ + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + # + if test "$compiler_id" != "unknown"; then + # + if test "$compiler_id" = "GNU_C" || + test "$compiler_id" = "CLANG"; then + CARES_CONVERT_INCLUDE_TO_ISYSTEM + fi + # + 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" + ;; + # + 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 Placeholder + tmp_CFLAGS="$tmp_CFLAGS" + ;; + # + HP_UX_C) + # + dnl Disallow run-time dereferencing of null pointers + tmp_CFLAGS="$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 -we 140,147,165,266" + dnl Disable some remarks + dnl #279: controlling expression is constant + dnl #981: operands are evaluated in unspecified order + dnl #1469: "cc" clobber ignored + tmp_CPPFLAGS="$tmp_CPPFLAGS -wd 279,981,1469" + ;; + # + INTEL_WINDOWS_C) + # + dnl Placeholder + tmp_CFLAGS="$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="$tmp_CFLAGS" + ;; + # + WATCOM_UNIX_C) + # + dnl Placeholder + tmp_CFLAGS="$tmp_CFLAGS" + ;; + # + WATCOM_WINDOWS_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 + CARES_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="$tmp_save_CFLAGS" + ]) + fi + # + fi +]) + + +dnl CARES_SET_COMPILER_DEBUG_OPTS +dnl ------------------------------------------------- +dnl Sets compiler specific options/flags which depend +dnl on configure's debug option. + +AC_DEFUN([CARES_SET_COMPILER_DEBUG_OPTS], [ + AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + # + if test "$compiler_id" != "unknown"; then + # + tmp_save_CFLAGS="$CFLAGS" + tmp_save_CPPFLAGS="$CPPFLAGS" + # + tmp_options="" + tmp_CFLAGS="$CFLAGS" + tmp_CPPFLAGS="$CPPFLAGS" + CARES_VAR_STRIP([tmp_CFLAGS],[$flags_dbg_all]) + CARES_VAR_STRIP([tmp_CPPFLAGS],[$flags_dbg_all]) + # + if test "$want_debug" = "yes"; then + AC_MSG_CHECKING([if compiler accepts debug enabling options]) + tmp_options="$flags_dbg_yes" + fi + if test "$want_debug" = "no"; then + AC_MSG_CHECKING([if compiler accepts debug disabling options]) + tmp_options="$flags_dbg_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 + CARES_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="$tmp_save_CFLAGS" + ]) + # + fi +]) + + +dnl CARES_SET_COMPILER_OPTIMIZE_OPTS +dnl ------------------------------------------------- +dnl Sets compiler specific options/flags which depend +dnl on configure's optimize option. + +AC_DEFUN([CARES_SET_COMPILER_OPTIMIZE_OPTS], [ + AC_REQUIRE([CARES_CHECK_OPTION_OPTIMIZE])dnl + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + # + if test "$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]) + CARES_VAR_MATCH_IFELSE([tmp_CFLAGS],[$flags_opt_all],[ + honor_optimize_option="no" + ]) + CARES_VAR_MATCH_IFELSE([tmp_CPPFLAGS],[$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 "$honor_optimize_option" = "yes"; then + CARES_VAR_STRIP([tmp_CFLAGS],[$flags_opt_all]) + CARES_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 + CARES_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="$tmp_save_CFLAGS" + ]) + fi + # + fi +]) + + +dnl CARES_SET_COMPILER_WARNING_OPTS +dnl ------------------------------------------------- +dnl Sets compiler options/flags which depend on +dnl configure's warnings given option. + +AC_DEFUN([CARES_SET_COMPILER_WARNING_OPTS], [ + AC_REQUIRE([CARES_CHECK_OPTION_WARNINGS])dnl + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + # + if test "$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="$tmp_CFLAGS -pedantic" + tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra" + tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-strings" + tmp_CFLAGS="$tmp_CFLAGS -Wshadow" + tmp_CFLAGS="$tmp_CFLAGS -Winline -Wnested-externs" + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations" + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes" + tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" + tmp_CFLAGS="$tmp_CFLAGS -Wfloat-equal" + tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar -Wsign-compare" + tmp_CFLAGS="$tmp_CFLAGS -Wundef" + tmp_CFLAGS="$tmp_CFLAGS -Wno-format-nonliteral" + tmp_CFLAGS="$tmp_CFLAGS -Wendif-labels -Wstrict-prototypes" + tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement" + tmp_CFLAGS="$tmp_CFLAGS -Wcast-align" + tmp_CFLAGS="$tmp_CFLAGS -Wno-system-headers" + tmp_CFLAGS="$tmp_CFLAGS -Wshorten-64-to-32" + # + dnl Only clang 1.1 or later + if test "$compiler_num" -ge "101"; then + tmp_CFLAGS="$tmp_CFLAGS -Wunused" + fi + fi + ;; + # + DEC_C) + # + if test "$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 + # + 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="$tmp_CFLAGS -pedantic" + fi + # + dnl Set of options we believe *ALL* gcc versions support: + tmp_CFLAGS="$tmp_CFLAGS -Wall -W" + # + dnl Only gcc 1.4 or later + if test "$compiler_num" -ge "104"; then + tmp_CFLAGS="$tmp_CFLAGS -Wpointer-arith -Wwrite-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 + tmp_CFLAGS="$tmp_CFLAGS -Wunused -Wshadow" + fi + fi + # + dnl Only gcc 2.7 or later + if test "$compiler_num" -ge "207"; then + tmp_CFLAGS="$tmp_CFLAGS -Winline -Wnested-externs" + dnl If not cross-compiling with a gcc older than 3.0 + if test "x$cross_compiling" != "xyes" || + test "$compiler_num" -ge "300"; then + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-declarations" + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-prototypes" + fi + fi + # + dnl Only gcc 2.95 or later + if test "$compiler_num" -ge "295"; then + tmp_CFLAGS="$tmp_CFLAGS -Wno-long-long" + fi + # + dnl Only gcc 2.96 or later + if test "$compiler_num" -ge "296"; then + tmp_CFLAGS="$tmp_CFLAGS -Wfloat-equal" + tmp_CFLAGS="$tmp_CFLAGS -Wno-multichar -Wsign-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 + tmp_CFLAGS="$tmp_CFLAGS -Wundef" + fi + # + dnl Only gcc 2.97 or later + if test "$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 + tmp_CFLAGS="$tmp_CFLAGS -Wendif-labels -Wstrict-prototypes" + fi + # + dnl Only gcc 3.4 or later + if test "$compiler_num" -ge "304"; then + tmp_CFLAGS="$tmp_CFLAGS -Wdeclaration-after-statement" + fi + # + dnl Only gcc 4.0 or later + if test "$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 + tmp_CFLAGS="$tmp_CFLAGS -Wcast-align" + fi + # + dnl Only gcc 4.3 or later + if test "$compiler_num" -ge "403"; then + tmp_CFLAGS="$tmp_CFLAGS -Wtype-limits -Wold-style-declaration" + tmp_CFLAGS="$tmp_CFLAGS -Wmissing-parameter-type -Wempty-body" + tmp_CFLAGS="$tmp_CFLAGS -Wclobbered -Wignored-qualifiers" + tmp_CFLAGS="$tmp_CFLAGS -Wconversion -Wno-sign-conversion -Wvla" + 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="$tmp_CFLAGS -Wno-pedantic-ms-format" + fi + fi + # + fi + # + dnl Do not issue warnings for code in system include paths. + if test "$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" + dnl Only icc 10.0 or later + if test "$compiler_num" -ge "1000"; then + dnl Disable vectorizer diagnostic information + tmp_CFLAGS="$tmp_CFLAGS -vec-report0" + fi + ;; + # + 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 "$want_warnings" = "yes"; then + dnl Activate all warnings + tmp_CFLAGS="$tmp_CFLAGS -Wall" + dnl Make string constants be of type const char * + tmp_CFLAGS="$tmp_CFLAGS -Wwrite-strings" + dnl Warn use of unsupported GCC features ignored by TCC + tmp_CFLAGS="$tmp_CFLAGS -Wunsupported" + fi + ;; + # + WATCOM_UNIX_C) + # + if test "$want_warnings" = "yes"; then + dnl Issue all warnings + tmp_CFLAGS="$tmp_CFLAGS -Wall -Wextra" + fi + ;; + # + WATCOM_WINDOWS_C) + # + dnl Placeholder + tmp_CFLAGS="$tmp_CFLAGS" + ;; + # + esac + # + squeeze tmp_CPPFLAGS + squeeze tmp_CFLAGS + # + if test ! -z "$tmp_CFLAGS" || test ! -z "$tmp_CPPFLAGS"; then + AC_MSG_CHECKING([if compiler accepts strict warning options]) + CPPFLAGS="$tmp_save_CPPFLAGS $tmp_CPPFLAGS" + CFLAGS="$tmp_save_CFLAGS $tmp_CFLAGS" + squeeze CPPFLAGS + squeeze CFLAGS + CARES_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 CARES_SHFUNC_SQUEEZE +dnl ------------------------------------------------- +dnl Declares a shell function squeeze() which removes +dnl redundant whitespace out of a shell variable. + +AC_DEFUN([CARES_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 CARES_CHECK_CURLDEBUG +dnl ------------------------------------------------- +dnl Settings which depend on configure's curldebug given +dnl option, and other additional configure pre-requisites. +dnl Using the curl debug memory tracking feature in c-ares +dnl is a hack that actually can only be used/enabled when +dnl c-ares is built directly in curl's CVS tree, as a static +dnl library or as a shared one on those systems on which +dnl shared libraries support undefined symbols, along with +dnl an equally configured libcurl. + +AC_DEFUN([CARES_CHECK_CURLDEBUG], [ + AC_REQUIRE([XC_LIBTOOL])dnl + AC_REQUIRE([CARES_SHFUNC_SQUEEZE])dnl + cares_builddir=`pwd` + 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 + if test ! -f "$srcdir/../include/curl/curlbuild.h.dist"; then + AC_MSG_WARN([c-ares source not embedded in curl's CVS tree.]) + supports_curldebug="no" + elif test ! -f "$srcdir/../include/curl/Makefile.in"; then + AC_MSG_WARN([curl's buildconf has not been run.]) + supports_curldebug="no" + elif test ! -f "$cares_builddir/../libcurl.pc" || + test ! -f "$cares_builddir/../include/curl/curlbuild.h"; then + AC_MSG_WARN([curl's configure has not been run.]) + supports_curldebug="no" + elif test ! -f "$cares_builddir/../lib/curl_config.h"; then + AC_MSG_WARN([libcurl's curl_config.h is missing.]) + supports_curldebug="no" + elif test ! -f "$cares_builddir/../config.status"; then + AC_MSG_WARN([curl's config.status is missing.]) + supports_curldebug="no" + fi + if test "$supports_curldebug" != "no"; then + grep '^#define USE_ARES' "$cares_builddir/../lib/curl_config.h" >/dev/null + if test "$?" -ne "0"; then + AC_MSG_WARN([libcurl configured without c-ares support.]) + supports_curldebug="no" + fi + fi + if test "$supports_curldebug" != "no"; then + grep 'CPPFLAGS.*CURLDEBUG' "$cares_builddir/../config.status" >/dev/null + if test "$?" -ne "0"; then + AC_MSG_WARN([libcurl configured without curldebug support.]) + supports_curldebug="no" + fi + 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 + # + if test "$want_curldebug" = "yes"; then + dnl TODO: Verify if the BUILDING_LIBCURL definition is still required. + AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl]) + CPPFLAGS="-DCURLDEBUG $CPPFLAGS" + squeeze CPPFLAGS + fi + # + if test "$want_debug" = "yes"; then + CPPFLAGS="-DDEBUGBUILD $CPPFLAGS" + squeeze CPPFLAGS + fi +]) + + +dnl CARES_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([CARES_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 CARES_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([CARES_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE], [ + AC_REQUIRE([CARES_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 CARES_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([CARES_CHECK_COMPILER_STRUCT_MEMBER_SIZE], [ + AC_REQUIRE([CARES_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 CARES_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([CARES_CHECK_COMPILER_SYMBOL_HIDING], [ + AC_REQUIRE([CARES_CHECK_COMPILER])dnl + AC_BEFORE([$0],[CARES_CONFIGURE_SYMBOL_HIDING])dnl + AC_MSG_CHECKING([if compiler supports hiding library internal symbols]) + supports_symbol_hiding="no" + symbol_hiding_CFLAGS="" + symbol_hiding_EXTERN="" + tmp_CFLAGS="" + tmp_EXTERN="" + case "$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 $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then + tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))" + tmp_CFLAGS="-fvisibility=hidden" + supports_symbol_hiding="yes" + fi + fi + ;; + INTEL_UNIX_C) + dnl Only icc 9.0 or later + if test "$compiler_num" -ge "900"; then + if $CC --help --verbose 2>&1 | grep fvisibility= > /dev/null ; then + tmp_save_CFLAGS="$CFLAGS" + CFLAGS="$CFLAGS -fvisibility=hidden" + AC_LINK_IFELSE([ + AC_LANG_PROGRAM([[ +# include <stdio.h> + ]],[[ + printf("icc fvisibility bug test"); + ]]) + ],[ + tmp_EXTERN="__attribute__ ((__visibility__ (\"default\")))" + tmp_CFLAGS="-fvisibility=hidden" + supports_symbol_hiding="yes" + ]) + CFLAGS="$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 CARES_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([CARES_CHECK_COMPILER_PROTOTYPE_MISMATCH], [ + AC_REQUIRE([CARES_CHECK_COMPILER_HALT_ON_ERROR])dnl + AC_MSG_CHECKING([if compiler halts on function prototype mismatch]) + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM([[ +# include <stdlib.h> + int rand(int n); + int rand(int n) + { + if(n) + return ++n; + else + return n; + } + ]],[[ + int i[2]; + 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 CARES_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([CARES_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 CARES_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([CARES_VAR_MATCH_IFELSE], [ + CARES_VAR_MATCH([$1],[$2]) + if test "$ac_var_match_word" = "yes"; then + ifelse($3,,:,[$3]) + ifelse($4,,,[else + $4]) + fi +]) + + +dnl CARES_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([CARES_VAR_STRIP], [ + AC_REQUIRE([CARES_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] +]) + |