From 718469e240675b161006ee4f2d5d52de9ad14f2f Mon Sep 17 00:00:00 2001
From: Pixel <Pixel>
Date: Sun, 13 Jan 2002 15:42:03 +0000
Subject: Zlib test & patch.

---
 acconfig.h    |  1 +
 configure.in  | 19 ++++++++++++++++++-
 zconf.h-patch | 13 +++++++++++++
 3 files changed, 32 insertions(+), 1 deletion(-)
 create mode 100644 zconf.h-patch

diff --git a/acconfig.h b/acconfig.h
index d4dba2c..62df7e4 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -1,3 +1,4 @@
+#undef HAVE_WD_ZLIB
 #undef HAVE_LIBINTL_H
 
 /* Define to 1 if NLS is requested.  */
diff --git a/configure.in b/configure.in
index da4182e..ff5eaec 100644
--- a/configure.in
+++ b/configure.in
@@ -80,7 +80,24 @@ AC_CHECK_FUNCS(getcwd getwd putenv strdup memmove memset select poll)
 AC_CHECK_FUNCS(strerror strrchr strstr mempcpy nl_langinfo strcspn)
 AC_SEARCH_LIBS(socket,socket)
 AC_SEARCH_LIBS(gethostbyname,nsl)
-AC_SEARCH_LIBS(deflate,z)
+AC_SEARCH_LIBS(gzwrite,z)
+if test x$ac_cv_search_deflate != xno ; then
+  AC_CACHE_CHECK([for well defined gzwrite in zlib.h], ac_cv_wd_gzwrite,
+    AC_TRY_COMPILE(
+      [#include <zlib.h>],
+      [const void * buf; gzwrite(NULL, buf, 0);],
+      [AC_DEFINE(HAVE_WD_ZLIB)
+       ac_cv_wd_gzwrite="yes"],
+      [ac_cv_wd_gzwrite="no"]
+      AC_ERROR([You have a broken zconf.h and compiler pair. You]
+               [should patch this using the zconf.h-patch file.])
+    )
+  )
+else
+  AC_ERROR([This library needs the zlib library. You can found]
+           [it at the url: http://www.zlib.org])
+fi
+
 AC_FUNC_FORK
 AC_FUNC_MALLOC
 AC_FUNC_VPRINTF
diff --git a/zconf.h-patch b/zconf.h-patch
new file mode 100644
index 0000000..c0c872f
--- /dev/null
+++ b/zconf.h-patch
@@ -0,0 +1,13 @@
+--- zconf.h	Wed Jul  8 19:55:27 1998
++++ zconf.h	Thu Dec  6 00:55:46 2001
+@@ -228,8 +228,8 @@
+ typedef uLong FAR uLongf;
+ 
+ #ifdef STDC
+-   typedef void FAR *voidpf;
+-   typedef void     *voidp;
++#  define voidpf void FAR *
++#  define voidp void *
+ #else
+    typedef Byte FAR *voidpf;
+    typedef Byte     *voidp;
-- 
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