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Thu, 09 Apr 2026 08:46:59 -0700 (PDT) From: Hisam Mehboob To: Sean Christopherson , Shuah Khan Cc: kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Aqib Faruqui , shuah@kernel.org, pbonzini@redhat.com, Hisam Mehboob Subject: [PATCH v2] KVM: selftests: Guard execinfo.h inclusion for non-glibc builds Date: Thu, 9 Apr 2026 20:38:47 +0500 Message-ID: <20260409153846.1502656-2-hisamshar@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260319000842.1213426-2-hisamshar@gmail.com> References: <20260319000842.1213426-2-hisamshar@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The backtrace() function and execinfo.h are GNU extensions available in glibc but not in non-glibc C libraries such as musl. Building KVM selftests with musl-gcc fails with: lib/assert.c:9:10: fatal error: execinfo.h: No such file or directory Fix this by guarding the inclusion of execinfo.h and the stack dumping logic under #ifdef __GLIBC__. For non-glibc builds, provide a local stub for test_dump_stack(). Suggested-by: Aqib Faruqui Suggested-by: Sean Christopherson Signed-off-by: Hisam Mehboob --- Changes in v2: - Replaced the __weak stub approach with a single #ifdef __GLIBC__ and a local stub inside assert.c as suggested by Sean Christopherson. tools/testing/selftests/kvm/lib/assert.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/lib/assert.c b/tools/testing/selftests/kvm/lib/assert.c index b49690658c60..8be0d09ecf0f 100644 --- a/tools/testing/selftests/kvm/lib/assert.c +++ b/tools/testing/selftests/kvm/lib/assert.c @@ -6,11 +6,14 @@ */ #include "test_util.h" -#include + #include #include "kselftest.h" +#ifdef __GLIBC__ +#include + /* Dumps the current stack trace to stderr. */ static void __attribute__((noinline)) test_dump_stack(void); static void test_dump_stack(void) @@ -57,6 +60,9 @@ static void test_dump_stack(void) system(cmd); #pragma GCC diagnostic pop } +#else +static void test_dump_stack(void) {} +#endif static pid_t _gettid(void) { -- 2.51.0