fix broken thread list unlocking after fork

[musl] / src / math / sincosf.c

diff --git a/src/math/sincosf.c b/src/math/sincosf.c
index 1b50f01..f8ca723 100644 (file)
--- a/src/math/sincosf.c
+++ b/src/math/sincosf.c
@@ -14,6 +14,7 @@
  * ====================================================
  */
 
+#define _GNU_SOURCE
 #include "libm.h"
 
 /* Small multiples of pi/2 rounded to double precision. */