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add basic support for checking for C compiler attribute support


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@23380 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Kevin P. Fleming
2006-04-29 15:31:45 +00:00
parent 24f241bc72
commit 3878a2a9fb
3 changed files with 21 additions and 3 deletions
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19
acinclude.m4
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@@ -68,7 +68,7 @@ AC_SUBST([PBX_LIB$1])
AC_DEFUN(
[AST_CHECK_GNU_MAKE], [ AC_CACHE_CHECK( for GNU make, GNU_MAKE,
[AST_CHECK_GNU_MAKE], [AC_CACHE_CHECK(for GNU make, GNU_MAKE,
GNU_MAKE='Not Found' ;
for a in make gmake gnumake ; do
if test -z "$a" ; then continue ; fi ;
@@ -83,4 +83,19 @@ if test "x$GNU_MAKE" = "xNot Found" ; then
exit 1
fi
AC_SUBST([GNU_MAKE])
] )
])
AC_DEFUN(
[AST_C_ATTRIBUTE],
[AC_CACHE_CHECK([for $1 attribute support],
[ac_cv_attribute_$1],
AC_COMPILE_IFELSE(
AC_LANG_PROGRAM(
[[static void foo(void) __attribute__ (($1));xyz]],
[]),
have_attribute_$1=1, have_attribute_$1=0)
)
if test "$have_attribute_$1" = "1"; then
AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to indicate the compiler supports __attribute__ (($1))])
fi
])