selftests/nolibc: enable -Wundef

Users might use -Wundef, so also use it in the nolibc testsuite to
ensure no warnings are triggered.

The existing line with warning options is getting too long,
so move all warnings to a dedicated line.

Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://patch.msgid.link/20260318-nolibc-wundef-v1-2-fcb7f9ac7298@weissschuh.net

diff --git a/tools/testing/selftests/nolibc/Makefile.include b/tools/testing/selftests/nolibc/Makefile.include
index 41a0039f774c94f387a802519308ae168a48f032..96fe2bc2191eb605f337817f68f5510e6d78e696 100644 (file)
--- a/tools/testing/selftests/nolibc/Makefile.include
+++ b/tools/testing/selftests/nolibc/Makefile.include
@@ -5,7 +5,8 @@ _CFLAGS_STACKPROTECTOR ?= $(call try-run, \
        echo 'void foo(void) {}' | $(CC) -x c - -o - -S $(CLANG_CROSS_FLAGS) $(__CFLAGS_STACKPROTECTOR) | grep -q __stack_chk_guard, \
        $(__CFLAGS_STACKPROTECTOR))
 _CFLAGS_SANITIZER ?= $(call cc-option,-fsanitize=undefined -fsanitize-trap=all)
-CFLAGS_NOLIBC_TEST  ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 -W -Wall -Wextra \
+CFLAGS_NOLIBC_TEST  ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \
+               -W -Wall -Wextra -Wundef \
                $(call cc-option,-fno-stack-protector) $(call cc-option,-Wmissing-prototypes) \
                $(_CFLAGS_STACKPROTECTOR) $(_CFLAGS_SANITIZER)