asterisk/autoconf/ast_gcc_attribute.m4

# Helper function to check for gcc attributes.
# AST_GCC_ATTRIBUTE([attribute name])

AC_DEFUN([AST_GCC_ATTRIBUTE],
[
AC_MSG_CHECKING(for compiler 'attribute $1' support)
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
AC_COMPILE_IFELSE(
	AC_LANG_PROGRAM([void __attribute__(($1)) *test(void *muffin, ...) {}],
			[]),
	AC_MSG_RESULT(yes)
	AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),
	AC_MSG_RESULT(no))
]
CFLAGS="$saved_CFLAGS"
)
Merged revisions 151242-151243 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ................ r151242 \| kpfleming \| 2008-10-20 07:59:04 +0300 (Mon, 20 Oct 2008) \| 9 lines Merged revisions 151240 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r151240 \| kpfleming \| 2008-10-20 07:45:56 +0300 (Mon, 20 Oct 2008) \| 3 lines break up acinclude.m4 into individual files, which will make it easier to maintain, easier to add new macros (less patching) and will ease maintenance of these macros across Asterisk branches ........ ................ r151243 \| kpfleming \| 2008-10-20 08:00:56 +0300 (Mon, 20 Oct 2008) \| 9 lines Merged revisions 151241 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r151241 \| kpfleming \| 2008-10-20 07:57:33 +0300 (Mon, 20 Oct 2008) \| 2 lines rename this macro to properly reflect what it does ........ ................ git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@151245 65c4cc65-6c06-0410-ace0-fbb531ad65f3 2008-10-20 05:06:29 +00:00			`# Helper function to check for gcc attributes.`
			`# AST_GCC_ATTRIBUTE([attribute name])`

			`AC_DEFUN([AST_GCC_ATTRIBUTE],`
			`[`
			`AC_MSG_CHECKING(for compiler 'attribute $1' support)`
			`saved_CFLAGS="$CFLAGS"`
			`CFLAGS="$CFLAGS -Werror"`
			`AC_COMPILE_IFELSE(`
Merged revision 153709 from trunk ------------------------------------------------------------------------ r153709 \| kpfleming \| 2008-11-02 17:34:39 -0600 (Sun, 02 Nov 2008) \| 3 lines instead of trying to forcibly load res_agi when app_stack is loaded (even if the administrator didn't want it loaded), use GCC weak symbols to determine whether it was loaded already or not; if it was loaded, then use it. ------------------------------------------------------------------------ git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@153711 65c4cc65-6c06-0410-ace0-fbb531ad65f3 2008-11-03 00:21:04 +00:00			`AC_LANG_PROGRAM([void __attribute__(($1)) test(void muffin, ...) {}],`
Merged revisions 151242-151243 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ................ r151242 \| kpfleming \| 2008-10-20 07:59:04 +0300 (Mon, 20 Oct 2008) \| 9 lines Merged revisions 151240 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r151240 \| kpfleming \| 2008-10-20 07:45:56 +0300 (Mon, 20 Oct 2008) \| 3 lines break up acinclude.m4 into individual files, which will make it easier to maintain, easier to add new macros (less patching) and will ease maintenance of these macros across Asterisk branches ........ ................ r151243 \| kpfleming \| 2008-10-20 08:00:56 +0300 (Mon, 20 Oct 2008) \| 9 lines Merged revisions 151241 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r151241 \| kpfleming \| 2008-10-20 07:57:33 +0300 (Mon, 20 Oct 2008) \| 2 lines rename this macro to properly reflect what it does ........ ................ git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.6.1@151245 65c4cc65-6c06-0410-ace0-fbb531ad65f3 2008-10-20 05:06:29 +00:00			`[]),`
			`AC_MSG_RESULT(yes)`
			`AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]),`
			`AC_MSG_RESULT(no))`
			`]`
			`CFLAGS="$saved_CFLAGS"`
			`)`