Attempt to find zlib if no pkgconfig for it

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

diff --git a/configure.ac b/configure.ac
index 7f47c9c..2e67dd8 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -80,10 +80,22 @@ AC_ARG_WITH([openssl],
             AC_ENABLE_SHARED
             AC_DISABLE_STATIC])
 
-AC_PROG_LIBTOOL
-
 PKG_CHECK_MODULES(LIBXML2, libxml-2.0)
-PKG_CHECK_MODULES(ZLIB, zlib)
+
+PKG_CHECK_MODULES(ZLIB, zlib, [],
+                 [oldLIBS="$LIBS"
+                 LIBS="$LIBS -lz" 
+                 AC_MSG_CHECKING([for zlib without pkg-config])
+                 AC_LINK_IFELSE([AC_LANG_PROGRAM([
+                  #include <zlib.h>],[
+                  z_stream zs;
+                  deflateInit2(&zs, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
+                               -12, 9, Z_DEFAULT_STRATEGY);])],
+                 [AC_MSG_RESULT(yes)
+                  AC_SUBST([ZLIB_LIBS], [-lz])
+                  AC_SUBST([ZLIB_CFLAGS], [])],
+                 [AC_MSG_RESULT(no)
+                  AC_ERROR([Could not build against zlib])])])
 
 PKG_CHECK_MODULES(LIBPROXY, libproxy-1.0,
                [AC_SUBST(LIBPROXY_PC, libproxy-1.0)