in math.h make lgamma_r and non-double bessel _GNU_SOURCE only

[musl] / src / math / lgammaf.c

diff --git a/src/math/lgammaf.c b/src/math/lgammaf.c
index f50f237..aed98ba 100644 (file)
--- a/src/math/lgammaf.c
+++ b/src/math/lgammaf.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE
 #include "libm.h"
 
 float lgammaf(float x)