use __builtin_setjmp on mingw64 [Bug #15348].

ko1 · ko1 · commit 66e9bfd4be3d · 2018-11-29T06:37:01.000Z
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66087 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
diff --git a/configure.ac b/configure.ac
@@ -961,7 +961,7 @@ main()
 		ac_cv_type_off_t=yes
 		ac_cv_sizeof_off_t=8
 		AS_IF([test "$target_cpu" = x64], [
-		    ac_cv_func___builtin_setjmp=no
+		    ac_cv_func___builtin_setjmp=yes
 		    ac_cv_func_round=no
 		    rb_cv_fiber_coroutine=yes
 		])
