--- a/base/gp_mswin.c	2014-09-22 19:17:33.000000000 +0900
+++ b/base/gp_mswin.c	2015-03-11 21:10:32.833047100 +0900
@@ -900,6 +900,7 @@
 /* Microsoft Visual C++ 2005  doesn't properly define snprintf,
    which is defined in the C standard ISO/IEC 9899:1999 (E) */
 
+#if !defined(__CYGWIN__) && !defined(__MINGW32__)
 int snprintf(char *buffer, size_t count, const char *format, ...)
 {
     if (count > 0) {
@@ -914,3 +915,4 @@
     } else
         return 0;
 }
+#endif