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-rw-r--r--include/c11/threads_posix.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/c11/threads_posix.h b/include/c11/threads_posix.h
index 61b7fab..43e803e 100644
--- a/include/c11/threads_posix.h
+++ b/include/c11/threads_posix.h
@@ -184,7 +184,7 @@ mtx_destroy(mtx_t *mtx)
* Thus the linker will be happy and things don't clash when building
* with -O1 or greater.
*/
-#ifdef HAVE_FUNC_ATTRIBUTE_WEAK
+#if defined(HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__)
__attribute__((weak))
int pthread_mutexattr_init(pthread_mutexattr_t *attr);