[PATCH v5 02/68] kselftest: Desecalate reporting of missing _GNU_SOURCE

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From: Mark Brown <broonie@xxxxxxxxxx>

Commit daef47b89efd0b7 ("selftests: Compile kselftest headers with
-D_GNU_SOURCE") adds a static_assert() which means that things which
would be warnings about undeclared functions get escalated into build
failures.  While we do actually want _GNU_SOURCE to be defined for users
of kselftest_harness we haven't actually done that yet and this is
causing widespread build breaks which were previously warnings about
uses of asprintf() without prototypes, including causing other test
programs in the same directory to fail to build.

Since the build failures that are introduced cause additional issues due
to make stopping builds early replace the static_assert() with a
missing without making the error more severe than it already was.  This
will be moot once the issue is fixed properly but reduces the disruption
while that happens.

Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
 tools/testing/selftests/kselftest_harness.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kselftest_harness.h b/tools/testing/selftests/kselftest_harness.h
index b634969cbb6f..8e53686b71cb 100644
--- a/tools/testing/selftests/kselftest_harness.h
+++ b/tools/testing/selftests/kselftest_harness.h
@@ -51,7 +51,7 @@
 #define __KSELFTEST_HARNESS_H
 
 #ifndef _GNU_SOURCE
-#define _GNU_SOURCE
+#warning kselftest harness requires _GNU_SOURCE to be defined
 #endif
 #include <asm/types.h>
 #include <ctype.h>
-- 
2.45.1.288.g0e0cd299f1-goog





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