This commit was manufactured by cvs2svn to create tag 'v1_6_3'.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_6_3@1265 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/math.c b/math.c
index ac87b9c8dc..2cac83e938 100644
--- a/math.c
+++ b/math.c
@@ -64,6 +64,11 @@ math_exp(obj, x)
     return rb_float_new(exp(RFLOAT(x)->value));
 }
 
+#if defined __CYGWIN__
+#define log(x) ((x) < 0.0 ? nan() : log(x))
+#define log10(x) ((x) < 0.0 ? nan() : log10(x))
+#endif
+
 static VALUE
 math_log(obj, x)
     VALUE obj, x;