diff options
| author | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2009-06-16 01:33:30 +0000 |
|---|---|---|
| committer | kpfleming <kpfleming@f38db490-d61c-443f-a65b-d21fe96a405b> | 2009-06-16 01:33:30 +0000 |
| commit | 7b905ba00038bd8c5483e7c0d691dea71ebb76ed (patch) | |
| tree | 8640b1f87f42a0edb076b92a46ce649c88b3c4c0 /autoconf | |
| parent | 1c05391846dfea23af207f3a183fbbdb74f05f4b (diff) | |
Merged revisions 200764 via svnmerge from
https://origsvn.digium.com/svn/asterisk/trunk
........
r200764 | kpfleming | 2009-06-15 20:28:08 -0500 (Mon, 15 Jun 2009) | 11 lines
Ensure that configure-script testing for compiler attributes actually works.
The configure script tests for compiler attributes didn't actually enable
enough warnings or provide a proper test harness to determine whether the
compiler supports the attribute in question or not; this caused gcc 4.1 to
report that it supports 'weakref', but it doesn't actually support it in the
way that is needed for our optional API mechanism. The new configure script
test will properly distinguish between full support and partial support
for this attribute, among others.
........
git-svn-id: http://svn.digium.com/svn/asterisk/branches/1.6.0@200767 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'autoconf')
| -rw-r--r-- | autoconf/ast_gcc_attribute.m4 | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/autoconf/ast_gcc_attribute.m4 b/autoconf/ast_gcc_attribute.m4 index 167bb4e79..806b39019 100644 --- a/autoconf/ast_gcc_attribute.m4 +++ b/autoconf/ast_gcc_attribute.m4 @@ -1,17 +1,31 @@ # Helper function to check for gcc attributes. -# AST_GCC_ATTRIBUTE([attribute name]) +# AST_GCC_ATTRIBUTE([attribute name], [attribute syntax]) AC_DEFUN([AST_GCC_ATTRIBUTE], [ AC_MSG_CHECKING(for compiler 'attribute $1' support) saved_CFLAGS="$CFLAGS" -CFLAGS="$CFLAGS -Werror" +CFLAGS="$CFLAGS -Wall -Wno-unused -Werror" + +if test "x$2" = "x" +then AC_COMPILE_IFELSE( - AC_LANG_PROGRAM([void __attribute__(($1)) *test(void *muffin, ...) {}], + AC_LANG_PROGRAM([static void __attribute__(($1)) *test(void *muffin, ...) {return (void *) 0;}], []), 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)) -] + AC_MSG_RESULT(no) +) +else +AC_COMPILE_IFELSE( + AC_LANG_PROGRAM([static void __attribute__(($2)) *test(void *muffin, ...) {return (void *) 0;}], + []), + AC_MSG_RESULT(yes) + AC_DEFINE_UNQUOTED([HAVE_ATTRIBUTE_$1], 1, [Define to 1 if your GCC C compiler supports the '$1' attribute.]), + AC_MSG_RESULT(no) +) +fi + CFLAGS="$saved_CFLAGS" +] ) |