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asterisk/autoconf/ast_gcc_attribute.m4
Kevin P. Fleming d660c03fdc Merged revision 153709 from trunk
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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.


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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

18 lines
498 B
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# 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"
)