[libvirt] [PATCH 2/2] build: relax the relaxed stack frame limit further

[Ján Tomko]

Pick 256k as the limit.

While -Wno-frame-larger-than would make more sense for usage
in our test suite, the -Wno version seems to have no effect
if -Wframe-larger-than was already specified.

Use an (un)reasonably large value instead.

Fixes the build with clang:
../../tests/cputest.c:964:1: error: stack frame size of 33176 bytes
in function 'mymain' [-Werror,-Wframe-larger-than=]
mymain(void)
^
1 error generated.

Signed-off-by: Ján Tomko <jtomko at redhat.com>
---
 m4/virt-compile-warnings.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/m4/virt-compile-warnings.m4 b/m4/virt-compile-warnings.m4
index 5f930756b0..fc0b9bfa55 100644
--- a/m4/virt-compile-warnings.m4
+++ b/m4/virt-compile-warnings.m4
@@ -172,7 +172,7 @@ AC_DEFUN([LIBVIRT_COMPILE_WARNINGS],[
     # but using 1024 bytes sized buffers (mostly for virStrerror)
     # stops us from going down further
     wantwarn="$wantwarn -Wframe-larger-than=4096"
-    gl_WARN_ADD([-Wframe-larger-than=32768], [RELAXED_FRAME_LIMIT_CFLAGS])
+    gl_WARN_ADD([-Wframe-larger-than=262144], [RELAXED_FRAME_LIMIT_CFLAGS])
 
     # Extra special flags
     dnl -fstack-protector stuff passes gl_WARN_ADD with gcc
-- 
2.19.2