From 98e5787e1b22c2f974e3e80eda135abe7e008251 Mon Sep 17 00:00:00 2001
From: Mark Adler <madler@alumni.caltech.edu>
Date: Mon, 30 Jan 2012 23:55:14 -0800
Subject: Fix problem with ./configure --prefix and gzgetc macro.

---
 zlib.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/zlib.h b/zlib.h
index 43d58b6..72252b5 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1651,8 +1651,14 @@ struct gzFile_s {
     z_off64_t pos;
 };
 ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));
-#define gzgetc(g) \
-    ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc_(g))
+#ifdef Z_PREFIX_SET
+#  undef z_gzgetc
+#  define z_gzgetc(g) \
+          ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc_(g))
+#else
+#  define gzgetc(g) \
+          ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc_(g))
+#endif
 
 /* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
  * change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if
-- 
cgit v1.2.3-55-g6feb