[pull] master from ruby:master

configure.ac

@@ -2501,9 +2501,7 @@ AC_CACHE_CHECK(for negative time_t for gmtime(3), rb_cv_negative_time_t,
 #include <time.h>
 
 void
-check(tm, y, m, d, h, s)
-    struct tm *tm;
-    int y, m, d, h, s;
+check(struct tm *tm, int y, int m, int d, int h, int s)
 {
     if (!tm ||
 	tm->tm_year != y ||
@@ -2587,8 +2585,7 @@ AS_IF([test "$ac_cv_func_sigprocmask" = yes && test "$ac_cv_func_sigaction" = ye
 #include <signal.h>
 
 void
-sig_handler(dummy)
-     int dummy;
+sig_handler(int dummy)
 {
 }