complex.c: M_PI in VC

* complex.c (_USE_MATH_DEFINES): needed for M_PI in Microsoft Visual C. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49732 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2015-02-25 02:25:22 +00:00 · 2015-02-25 02:25:22 +00:00 · 7b65fb292a
commit 7b65fb292a
parent 5ac58b272d
1 changed files with 4 additions and 0 deletions
--- a/complex.c
+++ b/complex.c
@ -6,6 +6,10 @@
 */

 #include "internal.h"
+#if defined _MSC_VER
+/* Microsoft Visual C does not define M_PI and others by default */
+# define _USE_MATH_DEFINES 1
+#endif
 #include <math.h>

 #define NDEBUG