Subject: [PATCH] kunit: fixes Compilation error on s390

From: Alessandro Carminati <[email-masked]>
Date: Sat, 29 Mar 2025 15:03:20 +0000

The current implementation of suppressing warning backtraces uses __func__,
which is a compile-time constant only for non -fPIC compilation.
GCC's support for this situation in position-independent code varies across
versions and architectures.

On the s390 architecture, -fPIC is required for compilation, and support
for this scenario is available in GCC 11 and later.

Fixes:  d8b14a2 ("bug/kunit: core support for suppressing warning backtraces")

Signed-off-by: Alessandro Carminati <[email-masked]>
---
 lib/kunit/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/kunit/Kconfig b/lib/kunit/Kconfig
index 201402f0ab49..6c937144dcea 100644
--- a/lib/kunit/Kconfig
+++ b/lib/kunit/Kconfig
@@ -17,6 +17,7 @@ if KUNIT
 
 config KUNIT_SUPPRESS_BACKTRACE
 	bool "KUnit - Enable backtrace suppression"
+	depends on (!S390 && CC_IS_GCC) || (CC_IS_GCC && GCC_VERSION >= 110000)
 	default y
 	help
 	  Enable backtrace suppression for KUnit. If enabled, backtraces
-- 
2.34.1