nobu	2017-05-14 10:03:15 +0900 (Sun, 14 May 2017)

  New Revision: 58710

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=58710

  Log:
    tgamma on mingw
    
    * configure.in: get rid of unreliable tgamma() implemented of
      mingw, which returns NaN unexpectedly.

  Modified files:
    trunk/configure.in
Index: configure.in
===================================================================
--- configure.in	(revision 58709)
+++ configure.in	(revision 58710)
@@ -1317,6 +1317,7 @@ main() https://github.com/ruby/ruby/blob/trunk/configure.in#L1317
 		    ac_cv_func___builtin_setjmp=no
 		    ac_cv_func_round=no
 		])
+		ac_cv_func_tgamma=no
 		AC_CHECK_TYPE([NET_LUID], [], [],
 			      [@%:@include <winsock2.h>
 			      @%:@include <iphlpapi.h>])

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