- add test to detect if GNU as supports .cfi directives
- correct stack-boundary test. this test is apparently redundant
as it always passed, and nobody complained ;)
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@1946 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index d241195..f3f032c 100644
--- a/configure.in
+++ b/configure.in
@@ -318,10 +318,25 @@
AC_SUBST(NPTL_THREADING)
+# check if the GNU as supports CFI directives
+AC_MSG_CHECKING([if gas accepts .cfi])
+AC_TRY_COMPILE(, [
+
+__asm__ __volatile__ (".cfi_startproc\n"
+ ".cfi_adjust_cfa_offset 0x0\n"
+ ".cfi_endproc\n");
+],
+[
+ AC_DEFINE_UNQUOTED([HAVE_GAS_CFI], 1, [Define if your GNU as supports .cfi])
+ AC_MSG_RESULT(yes)
+],
+ AC_MSG_RESULT(no)
+)
# does this compiler support -mpreferred-stack-boundary=2 ?
AC_MSG_CHECKING([if gcc accepts -mpreferred-stack-boundary])
+safe_CFLAGS=$CFLAGS
CFLAGS="-mpreferred-stack-boundary=2"
AC_TRY_COMPILE(, [
@@ -331,11 +346,12 @@
],
[
PREFERRED_STACK_BOUNDARY="-mpreferred-stack-boundary=2"
-AC_MSG_RESULT([$PREFERRED_STACK_BOUNDARY])
+AC_MSG_RESULT([yes])
], [
PREFERRED_STACK_BOUNDARY=""
AC_MSG_RESULT([no])
])
+CFLAGS=$safe_CFLAGS
AC_SUBST(PREFERRED_STACK_BOUNDARY)