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-rw-r--r--nptl/sysdeps/pthread/pthread.h14
1 files changed, 9 insertions, 5 deletions
diff --git a/nptl/sysdeps/pthread/pthread.h b/nptl/sysdeps/pthread/pthread.h
index 1e0c5dc937..142da639e4 100644
--- a/nptl/sysdeps/pthread/pthread.h
+++ b/nptl/sysdeps/pthread/pthread.h
@@ -83,12 +83,16 @@ enum
 
 
 /* Mutex initializers.  */
-#if __PTHREAD_MUTEX_HAVE_ELISION == 1 /* 64bit layout.  */
-#define __PTHREAD_SPINS 0, 0
-#elif __PTHREAD_MUTEX_HAVE_ELISION == 2 /* 32bit layout.  */
-#define __PTHREAD_SPINS { 0, 0 }
+#ifdef __PTHREAD_MUTEX_HAVE_ELISION
+# if __PTHREAD_MUTEX_HAVE_ELISION == 1 /* 64bit layout.  */
+#  define __PTHREAD_SPINS 0, 0
+# elif __PTHREAD_MUTEX_HAVE_ELISION == 2 /* 32bit layout.  */
+#  define __PTHREAD_SPINS { 0, 0 }
+# else
+#  error "Unknown value of __PTHREAD_MUTEX_HAVE_ELISION"
+# endif
 #else
-#define __PTHREAD_SPINS 0
+# define __PTHREAD_SPINS 0
 #endif
 
 #ifdef __PTHREAD_MUTEX_HAVE_PREV