From b212dd66746f274fa15b2824bcd7b14a72837f46 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 23 Sep 2016 14:18:41 +0000
Subject: zlib: no checks [ci skip]

* ext/zlib/extconf.rb: no feature checks when building zlib from
  the source, assume it is recent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56220 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ext/zlib/extconf.rb | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'ext/zlib')

diff --git a/ext/zlib/extconf.rb b/ext/zlib/extconf.rb
index c3035e37b5..47a15b1b20 100644
--- a/ext/zlib/extconf.rb
+++ b/ext/zlib/extconf.rb
@@ -70,9 +70,15 @@ if have_zlib
 
   $defs.concat(defines.collect{|d|' -D'+d})
 
-  have_func('crc32_combine', 'zlib.h')
-  have_func('adler32_combine', 'zlib.h')
-  have_type('z_crc_t', 'zlib.h')
+  if zsrc
+    $defs << "-DHAVE_CRC32_COMBINE"
+    $defs << "-DHAVE_ADLER32_COMBINE"
+    $defs << "-DHAVE_TYPE_Z_CRC_T"
+  else
+    have_func('crc32_combine', 'zlib.h')
+    have_func('adler32_combine', 'zlib.h')
+    have_type('z_crc_t', 'zlib.h')
+  end
 
   create_makefile('zlib') {|conf|
     if zsrc
-- 
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