extconf.rb: get rid of unnecessary checks

SIZEOF_*, *2NUM and NUM2* should all be defined by ruby.h and
dependencies it pulls in since Ruby 2.0 and possibly earlier.

INT_MAX and LLONG_MAX are in limits.h which is POSIX.

HAVE_GMTIME_R is already defined by ruby/config.h, so we
shouldn't have to check for it, either.

Combined, these changes speed up extconf.rb by several seconds.

1 files changed, 1 insertions, 0 deletions

diff --git a/ext/unicorn_http/httpdate.c b/ext/unicorn_http/httpdate.c
index b59d038..3f512dd 100644
--- a/ext/unicorn_http/httpdate.c
+++ b/ext/unicorn_http/httpdate.c
@@ -11,6 +11,7 @@ static const char months[] = "Jan\0Feb\0Mar\0Apr\0May\0Jun\0"
 
 /* for people on wonky systems only */
 #ifndef HAVE_GMTIME_R
+# warning using fake gmtime_r
 static struct tm * my_gmtime_r(time_t *now, struct tm *tm)
 {
         struct tm *global = gmtime(now);