stdcountof-h tests: Fix link error on MSVC 14 (regression 2025-06-07).

* tests/test-stdcountof-h.c (a, b, c): Define as variables on MSVC.

diff --git a/ChangeLog b/ChangeLog
index 07f0503f84fbb648dfa3425f1a1595181ff86616..932e94c63067a22abd5b0bdc012dc871a991dadd 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2025-10-12  Bruno Haible  <bruno@clisp.org>
+
+       stdcountof-h tests: Fix link error on MSVC 14 (regression 2025-06-07).
+       * tests/test-stdcountof-h.c (a, b, c): Define as variables on MSVC.
+
 2025-10-10  Collin Funk  <collin.funk1@gmail.com>
 
        getline tests: Add a test for the glibc bug.

diff --git a/tests/test-stdcountof-h.c b/tests/test-stdcountof-h.c
index 77cfbc4dec4580355075e0dc3b9fcf8a26f5f557..615cccda16240c787eb19443d36a2f528b339752 100644 (file)
--- a/tests/test-stdcountof-h.c
+++ b/tests/test-stdcountof-h.c
@@ -105,3 +105,12 @@ main ()
 
   return test_exit_status;
 }
+
+/* A definition of the variables a, b, c is not required by ISO C, because
+   these identifiers are only used as part of 'sizeof' expressions whose
+   results are integer expressions.  See ISO C 23 § 6.9.1.(5).  However,
+   MSVC 14 generates actual references to these variables.  We thus need
+   to define these variables; otherwise we get link errors.  */
+#if defined _MSC_VER && !defined __clang__
+int a, b, c;
+#endif