diff --git a/src/math/exp10.c b/src/math/exp10.c
index bc76d14..2dd7966 100644
--- a/src/math/exp10.c
+++ b/src/math/exp10.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/exp10f.c b/src/math/exp10f.c
index 1ca2034..09cafb1 100644
--- a/src/math/exp10f.c
+++ b/src/math/exp10f.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/exp10l.c b/src/math/exp10l.c
index 2644a4a..a610432 100644
--- a/src/math/exp10l.c
+++ b/src/math/exp10l.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/j0.c b/src/math/j0.c
index 0eecc56..4e3bc31 100644
--- a/src/math/j0.c
+++ b/src/math/j0.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/j0f.c b/src/math/j0f.c
index 9166eac..6db0cc8 100644
--- a/src/math/j0f.c
+++ b/src/math/j0f.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/j1.c b/src/math/j1.c
index d884091..677dc2d 100644
--- a/src/math/j1.c
+++ b/src/math/j1.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/j1f.c b/src/math/j1f.c
index 53135a0..17119ae 100644
--- a/src/math/j1f.c
+++ b/src/math/j1f.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/jn.c b/src/math/jn.c
index 2b198d4..7573edc 100644
--- a/src/math/jn.c
+++ b/src/math/jn.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/jnf.c b/src/math/jnf.c
index ecbc288..e5ae728 100644
--- a/src/math/jnf.c
+++ b/src/math/jnf.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgamma.c b/src/math/lgamma.c
index a838bc8..381e2d3 100644
--- a/src/math/lgamma.c
+++ b/src/math/lgamma.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgamma_r.c b/src/math/lgamma_r.c
index 2a5151e..0324815 100644
--- a/src/math/lgamma_r.c
+++ b/src/math/lgamma_r.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgammaf.c b/src/math/lgammaf.c
index 265d8d9..d20176b 100644
--- a/src/math/lgammaf.c
+++ b/src/math/lgammaf.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgammaf_r.c b/src/math/lgammaf_r.c
index 3783b99..278bfcf 100644
--- a/src/math/lgammaf_r.c
+++ b/src/math/lgammaf_r.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgammal.c b/src/math/lgammal.c
index e1cdd12..37047f9 100644
--- a/src/math/lgammal.c
+++ b/src/math/lgammal.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/lgammal_r.c b/src/math/lgammal_r.c
index 5153456..2f4927e 100644
--- a/src/math/lgammal_r.c
+++ b/src/math/lgammal_r.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/pow10.c b/src/math/pow10.c
index f980ce8..b5d2a83 100644
--- a/src/math/pow10.c
+++ b/src/math/pow10.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/pow10f.c b/src/math/pow10f.c
index 1a1f172..07cd3c3 100644
--- a/src/math/pow10f.c
+++ b/src/math/pow10f.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/pow10l.c b/src/math/pow10l.c
index 8cf8478..478f6a7 100644
--- a/src/math/pow10l.c
+++ b/src/math/pow10l.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/scalb.c b/src/math/scalb.c
index 786736a..b1ea51e 100644
--- a/src/math/scalb.c
+++ b/src/math/scalb.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/scalbf.c b/src/math/scalbf.c
index 3754282..c249153 100644
--- a/src/math/scalbf.c
+++ b/src/math/scalbf.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/sincos.c b/src/math/sincos.c
index 47e9eea..94c292d 100644
--- a/src/math/sincos.c
+++ b/src/math/sincos.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/sincosf.c b/src/math/sincosf.c
index f8a09e1..94e3654 100644
--- a/src/math/sincosf.c
+++ b/src/math/sincosf.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/sincosl.c b/src/math/sincosl.c
index 8d1e075..82dc65d 100644
--- a/src/math/sincosl.c
+++ b/src/math/sincosl.c
@@ -1,3 +1,4 @@
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/y0.c b/src/math/y0.c
index d6a3364..adf1416 100644
--- a/src/math/y0.c
+++ b/src/math/y0.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/y0f.c b/src/math/y0f.c
index 20ebab3..ac10355 100644
--- a/src/math/y0f.c
+++ b/src/math/y0f.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/y1.c b/src/math/y1.c
index 12e99e5..6bf5135 100644
--- a/src/math/y1.c
+++ b/src/math/y1.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/y1f.c b/src/math/y1f.c
index 78fa3c4..6c9ab8a 100644
--- a/src/math/y1f.c
+++ b/src/math/y1f.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/yn.c b/src/math/yn.c
index 4ac72fa..9dcaa61 100644
--- a/src/math/yn.c
+++ b/src/math/yn.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _XOPEN_SOURCE 700
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"
diff --git a/src/math/ynf.c b/src/math/ynf.c
index 436c0fa..f3c2b14 100644
--- a/src/math/ynf.c
+++ b/src/math/ynf.c
@@ -1,3 +1,5 @@
+#define _BSD_SOURCE 1
+#define _GNU_SOURCE 1
 #include <stdint.h>
 #include <stdio.h>
 #include "mtest.h"