From 91946b783499479fe65955bdad7865fd967934ea Mon Sep 17 00:00:00 2001
From: Xavier Roche <xroche@users.noreply.github.com>
Date: Sun, 8 Jun 2014 19:54:49 +0000
Subject: Fixed FTBFS when compiling with zlib versions < 1.2.70 (sammyx)

---
 src/minizip/ioapi.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

(limited to 'src/minizip/ioapi.h')

diff --git a/src/minizip/ioapi.h b/src/minizip/ioapi.h
index e4462b8..a531284 100644
--- a/src/minizip/ioapi.h
+++ b/src/minizip/ioapi.h
@@ -67,6 +67,24 @@
 #endif
 #endif
 
+/* As reported by sammyx, z_crc_t and z_const are not defined in pre-1.2.70 releases of zlib */
+/* See <https://github.com/madler/zlib/commit/6c9bd474aa08312ef2e2e9655a80e18db24a1680#diff-d466aa66f7e453e0c8a7719229cff391R391> */
+#if ZLIB_VERNUM < 0x1270
+
+#ifdef Z_U4
+   typedef Z_U4 z_crc_t;
+#else
+   typedef unsigned long z_crc_t;
+#endif
+
+#if defined(ZLIB_CONST) && !defined(z_const)
+#  define z_const const
+#else
+#  define z_const
+#endif
+
+#endif
+
 /*
 #ifndef ZPOS64_T
   #ifdef _WIN32
-- 
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