From 2ffabb05d05f01cea307a29b0a40b70fa5cdccb1 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Thu, 19 Oct 2006 20:53:36 +0000
Subject: [PATCH]   * Check for zlib if available.

---
 configure.ac | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index f4ee44b..5d6afea 100644
--- a/configure.ac
+++ b/configure.ac
@@ -25,7 +25,7 @@ if test "$build" != "$host" -a "${PKG_CONFIG_LIBDIR}" = ""; then
   export PKG_CONFIG_LIBDIR=/dev/null
 fi
 
-AC_CHECK_HEADERS(getopt.h sys/ioctl.h)
+AC_CHECK_HEADERS(getopt.h sys/ioctl.h zlib.h)
 
 AC_CHECK_FUNCS(getopt_long,
  [AC_DEFINE(HAVE_GETOPT_LONG, 1, Define to 1 if you have the `getopt_long' function.)],
@@ -34,6 +34,10 @@ AC_CHECK_FUNCS(getopt_long,
     GETOPT_LIBS="${GETOPT_LIBS} -lgnugetopt"])])
 AC_SUBST(GETOPT_LIBS)
 
+AC_CHECK_LIB(z, gzopen,
+ [ZLIB_LIBS="${ZLIB_LIBS} -lz"])
+AC_SUBST(ZLIB_LIBS)
+
 AC_CACHE_CHECK([for TIOCGWINSZ],
   [ac_cv_have_tiocgwinsz],
   [AC_TRY_COMPILE(