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flac/m4/add_cxxflags.m4

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configure.ac : Add hardening compile options. Extra compile options are detected at configure time with new XIPH_ADD_*FLAGS m4 macros. Options enabled include -Wextra, -D_FORTIFY_SOURCE=2 and stack protection.
2013-03-05 14:53:18 +04:00
dnl @synopsis XIPH_ADD_CXXFLAGS
dnl
dnl Add the given option to CXXFLAGS, if it doesn't break the compiler
AC_DEFUN([XIPH_ADD_CXXFLAGS],
[AC_MSG_CHECKING([if $CXX accepts $1])
AC_LANG_ASSERT([C++])
ac_add_cxxflags__old_cxxflags="$CXXFLAGS"
CXXFLAGS="$1"
Update configure.ac and m4 files with autoupdate 2.60 Starting with autoconf 2.70, obsolescence warnings are output by default. To keep the script as compatible as possible, I build autoconf 2.60 and ran the autoupdate that came with it on configure.ac and all m4 files.
2021-12-30 20:33:02 +03:00
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
configure.ac : Add hardening compile options. Extra compile options are detected at configure time with new XIPH_ADD_*FLAGS m4 macros. Options enabled include -Wextra, -D_FORTIFY_SOURCE=2 and stack protection.
2013-03-05 14:53:18 +04:00
#include <cstdio>
Update configure.ac and m4 files with autoupdate 2.60 Starting with autoconf 2.70, obsolescence warnings are output by default. To keep the script as compatible as possible, I build autoconf 2.60 and ran the autoupdate that came with it on configure.ac and all m4 files.
2021-12-30 20:33:02 +03:00
]], [[puts("Hello, World!"); return 0;]])],[AC_MSG_RESULT(yes)
CXXFLAGS="$ac_add_cxxflags__old_cxxflags $1"],[AC_MSG_RESULT(no)
configure.ac : Add hardening compile options. Extra compile options are detected at configure time with new XIPH_ADD_*FLAGS m4 macros. Options enabled include -Wextra, -D_FORTIFY_SOURCE=2 and stack protection.
2013-03-05 14:53:18 +04:00
CXXFLAGS="$ac_add_cxxflags__old_cxxflags"
Update configure.ac and m4 files with autoupdate 2.60 Starting with autoconf 2.70, obsolescence warnings are output by default. To keep the script as compatible as possible, I build autoconf 2.60 and ran the autoupdate that came with it on configure.ac and all m4 files.
2021-12-30 20:33:02 +03:00
])
configure.ac : Add hardening compile options. Extra compile options are detected at configure time with new XIPH_ADD_*FLAGS m4 macros. Options enabled include -Wextra, -D_FORTIFY_SOURCE=2 and stack protection.
2013-03-05 14:53:18 +04:00
])# XIPH_ADD_CXXFLAGS