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-rw-r--r--src/math.c1
-rw-r--r--src/time.c4
2 files changed, 4 insertions, 1 deletions
diff --git a/src/math.c b/src/math.c
index 96f803580..cbe773c58 100644
--- a/src/math.c
+++ b/src/math.c
@@ -11,7 +11,6 @@
mrb_raise(mrb, E_RANGE_ERROR, "Numerical argument is out of domain - " #msg);
/* math functions not provided under Microsoft Visual C++ */
-#define _MSC_VER
#ifdef _MSC_VER
#define asinh(x) log(x + sqrt(pow(x,2.0) + 1))
#define acosh(x) log(x + sqrt(pow(x,2.0) - 1))
diff --git a/src/time.c b/src/time.c
index cf2fd3b91..5e75152e6 100644
--- a/src/time.c
+++ b/src/time.c
@@ -27,8 +27,12 @@
#ifdef _WIN32
/* Win32 platform do not provide gmtime_r/localtime_r; emulate them using gmtime_s/localtime_s */
+#if _MVC_VER
#define gmtime_r(tp, tm) ((gmtime_s((tm), (tp)) == 0) ? (tp) : NULL)
#define localtime_r(tp, tm) ((localtime_s((tm), (tp)) == 0) ? (tp) : NULL)
+#else
+#define NO_GMTIME_R
+#endif
#endif
/* timegm(3) */