From: Debian PHP Maintainers <pkg-php-maint@lists.alioth.debian.org>
Date: Sat, 2 May 2015 10:26:56 +0200
Subject: zlib-largefile-function-renaming

---
 ext/zlib/zlib.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index ec958e1..06deaef 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -46,6 +46,18 @@
 #undef gzseek
 #undef gztell
 
+/*
+ * zlib include files can define the following preprocessor defines which rename
+ * the corresponding PHP functions to gzopen64, gzseek64 and gztell64 and thereby
+ * breaking some software, most notably PEAR's Archive_Tar, which halts execution
+ * without error message on gzip compressed archivesa.
+ *
+ * This only seems to happen on 32bit systems with large file support.
+ */
+#undef gzopen
+#undef gzseek
+#undef gztell
+
 ZEND_DECLARE_MODULE_GLOBALS(zlib);
 
 /* {{{ Memory management wrappers */