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-rw-r--r--m4/cares-compilers.m41470
1 files changed, 1470 insertions, 0 deletions
diff --git a/m4/cares-compilers.m4 b/m4/cares-compilers.m4
new file mode 100644
index 0000000..74950c7
--- /dev/null
+++ b/m4/cares-compilers.m4
@@ -0,0 +1,1470 @@
+#***************************************************************************
+# $Id: cares-compilers.m4,v 1.63 2009-11-16 23:01:37 yangtse Exp $
+#
+# Copyright (C) 2009 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 63
+
+
+dnl CARES_CHECK_COMPILER
+dnl -------------------------------------------------
+dnl Verify if the C compiler being used is known.
+
+AC_DEFUN([CARES_CHECK_COMPILER], [
+ AC_BEFORE([$0],[CARES_CHECK_NO_UNDEFINED])dnl
+ #
+ compiler_id="unknown"
+ compiler_num="0"
+ #
+ flags_dbg_all="unknown"
+ flags_dbg_yes="unknown"
+ flags_dbg_off="unknown"
+ flags_opt_all="unknown"
+ flags_opt_yes="unknown"
+ flags_opt_off="unknown"
+ #
+ CARES_CHECK_COMPILER_DEC_C
+ CARES_CHECK_COMPILER_HPUX_C
+ CARES_CHECK_COMPILER_IBM_C
+ CARES_CHECK_COMPILER_INTEL_C
+ CARES_CHECK_COMPILER_GNU_C
+ CARES_CHECK_COMPILER_LCC
+ CARES_CHECK_COMPILER_SGI_MIPSPRO_C
+ CARES_CHECK_COMPILER_SGI_MIPS_C
+ CARES_CHECK_COMPILER_SUNPRO_C
+ CARES_CHECK_COMPILER_TINY_C
+ CARES_CHECK_COMPILER_WATCOM_C
+ #
+ if test "$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_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_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"
+ 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"
+ 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
+ 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
+])
+
+
+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 "$compiler_id" = "GNU_C"; then
+ CARES_CONVERT_INCLUDE_TO_ISYSTEM
+ fi
+ #
+ tmp_save_CPPFLAGS="$CPPFLAGS"
+ tmp_save_CFLAGS="$CFLAGS"
+ tmp_CPPFLAGS=""
+ tmp_CFLAGS=""
+ #
+ case "$compiler_id" in
+ #
+ 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="$tmp_CFLAGS +W 4227,4255"
+ ;;
+ #
+ IBM_C)
+ #
+ dnl Ensure that compiler optimizations are always thread-safe.
+ tmp_CFLAGS="$tmp_CFLAGS -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_CFLAGS="$tmp_CFLAGS -qnoansialias"
+ dnl Force compiler to stop after the compilation phase, without
+ dnl generating an object code file when compilation has errors.
+ tmp_CFLAGS="$tmp_CFLAGS -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
+ #
+ CPPFLAGS="$tmp_CPPFLAGS"
+ CFLAGS="$tmp_CFLAGS $tmp_options"
+ 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="$flags_opt_off"
+ fi
+ CPPFLAGS="$tmp_CPPFLAGS"
+ CFLAGS="$tmp_CFLAGS $tmp_options"
+ 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 "$compiler_id" in
+ #
+ DEC_C)
+ #
+ if test "$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="$tmp_CFLAGS -Wdeclaration-after-statement"
+ fi
+ #
+ dnl Only gcc 4.3 or later
+ if test "$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="$tmp_CFLAGS -Wclobbered -Wignored-qualifiers"
+ fi
+ #
+ fi
+ #
+ dnl Do not issue warnings for code in system include paths.
+ if test "$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="$tmp_CFLAGS -no-ansi-alias"
+ dnl Value-safe optimizations on floating-point data
+ tmp_CFLAGS="$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([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 "$enable_shared" = "yes" &&
+ test "$need_no_undefined" = "yes"; 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 "$want_curldebug" = "yes"; then
+ dnl TODO: Verify if the BUILDING_LIBCURL definition is still required.
+ AC_DEFINE(BUILDING_LIBCURL, 1, [when building as static part of libcurl])
+ CPPFLAGS="$CPPFLAGS -DCURLDEBUG"
+ squeeze CPPFLAGS
+ fi
+ #
+ if test "$want_debug" = "yes"; then
+ CPPFLAGS="$CPPFLAGS -DDEBUGBUILD"
+ squeeze CPPFLAGS
+ fi
+])
+
+
+dnl CARES_CHECK_NO_UNDEFINED
+dnl -------------------------------------------------
+dnl Checks if the -no-undefined flag must be used when
+dnl building shared libraries. This is required on all
+dnl systems on which shared libraries should not have
+dnl references to undefined symbols. This check should
+dnl not be done before AC-PROG-LIBTOOL.
+
+AC_DEFUN([CARES_CHECK_NO_UNDEFINED], [
+ AC_BEFORE([$0],[CARES_CHECK_CURLDEBUG])dnl
+ AC_MSG_CHECKING([if shared libraries need -no-undefined])
+ need_no_undefined="no"
+ case $host in
+ *-*-cygwin* | *-*-mingw* | *-*-pw32* | *-*-cegcc* | *-*-aix*)
+ need_no_undefined="yes"
+ ;;
+ esac
+ if test "x$allow_undefined" = "xno"; then
+ need_no_undefined="yes"
+ elif test "x$allow_undefined_flag" = "xunsupported"; then
+ need_no_undefined="yes"
+ fi
+ AC_MSG_RESULT($need_no_undefined)
+])
+
+
+dnl CARES_CHECK_PROG_CC
+dnl -------------------------------------------------
+dnl Check for compiler program, preventing CFLAGS and
+dnl CPPFLAGS from being unexpectedly changed.
+
+AC_DEFUN([CARES_CHECK_PROG_CC], [
+ ac_save_CFLAGS="$CFLAGS"
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ AC_PROG_CC
+ CFLAGS="$ac_save_CFLAGS"
+ CPPFLAGS="$ac_save_CPPFLAGS"
+])
+
+
+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
+ 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([[
+ $tmp_EXTERN char *dummy(char *buff);
+ char *dummy(char *buff)
+ {
+ if(buff)
+ return ++buff;
+ else
+ return buff;
+ }
+ ]],[[
+ char b[16];
+ char *r = dummy(&b);
+ if(r)
+ return (int)*r;
+ ]])
+ ],[
+ supports_symbol_hiding="yes"
+ ],[
+ supports_symbol_hiding="no"
+ echo " " >&6
+ sed 's/^/cc-src: /' conftest.$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_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]
+])
+
generated by cgit (git 2.34.1) at 2024-05-02 06:28:19 +0000