[PATCH v4] meson: Use -fno-sanitize=function when available

[Akihiko Odaki <akihiko.odaki@daynix.com>]

Commit 23ef50ae2d0c (".gitlab-ci.d/buildtest.yml: Use
-fno-sanitize=function in the clang-system job") adds
-fno-sanitize=function for the CI but doesn't add the flag in the
other context. Add it to meson.build for such. It is not removed from
.gitlab-ci.d/buildtest.yml because -fno-sanitize=function in meson.build
does not affect --extra-cflags due to argument ordering.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
---
Changes in v4:
- Moved -fno-sanitize=function immediately after -fsanitize=undefined
- Link to v3: https://lore.kernel.org/r/20240816-function-v3-1-32ff225e550e@daynix.com

Changes in v3:
- I was not properly dropping the change of .gitlab-ci.d/buildtest.yml
  but only updated the message. v3 fixes this. (Thomas Huth)
- Link to v2: https://lore.kernel.org/r/20240729-function-v2-1-2401ab18b30b@daynix.com

Changes in v2:
- Dropped the change of: .gitlab-ci.d/buildtest.yml
- Link to v1: https://lore.kernel.org/r/20240714-function-v1-1-cc2acb4171ba@daynix.com
---
 meson.build | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/meson.build b/meson.build
index 5613b62a4f42..b7e50358a88a 100644
--- a/meson.build
+++ b/meson.build
@@ -483,8 +483,12 @@ if get_option('sanitizers')
   # Detect static linking issue with ubsan - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84285
   if cc.links('int main(int argc, char **argv) { return argc + 1; }',
               args: [qemu_ldflags, '-fsanitize=undefined'])
-    qemu_cflags = ['-fsanitize=undefined'] + qemu_cflags
-    qemu_ldflags = ['-fsanitize=undefined'] + qemu_ldflags
+    qemu_cflags = ['-fsanitize=undefined'] + \
+                  cc.get_supported_arguments('-fno-sanitize=function') + \
+                  qemu_cflags
+    qemu_ldflags = ['-fsanitize=undefined'] + \
+                   cc.get_supported_arguments('-fno-sanitize=function') + \
+                   qemu_ldflags
   endif
 endif
 

---
base-commit: 93b799fafd9170da3a79a533ea6f73a18de82e22
change-id: 20240714-function-7d32c723abbc

Best regards,
-- 
Akihiko Odaki <akihiko.odaki@daynix.com>