Use pkg-config to discover vmoddir

README

@@ -8,5 +8,7 @@ compile your vmod. Both the VARNISHSRCDIR and VARNISHSRCDIR/include
 will be added to the include search paths for your module.
 
 Optionally you can also set the vmod install dir by adding VMODDIR=DIR
-(defaults to LIBDIR/varnish/vmods, which would become
-/usr/local/lib/varnish/vmods on most platforms).
+(defaults to the pkg-config discovered directory from your Varnish
+installation).
+
+

configure.ac

 AC_PREREQ(2.59)
 AC_COPYRIGHT([Copyright (c) 2011 Varnish Software AS])
-AC_INIT([libvmod_example], [0.1])
+AC_INIT([libvmod-example], [0.1])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_SRCDIR(src/vmod.vcc)
 AM_CONFIG_HEADER(config.h)
@@ -22,6 +22,9 @@ AC_PROG_INSTALL
 AC_PROG_LIBTOOL
 AC_PROG_MAKE_SET
 
+# Check for pkg-config
+PKG_PROG_PKG_CONFIG
+
 # Checks for header files.
 AC_HEADER_STDC
 AC_CHECK_HEADERS([sys/stdlib.h])
@@ -43,7 +46,10 @@ AC_CHECK_FILE([$VARNISHSRC/include/varnishapi.h],
 # vmod installation dir
 AC_ARG_VAR([VMODDIR], [vmod installation directory @<:@LIBDIR/varnish/vmods@:>@])
 if test "x$VMODDIR" = x; then
-	VMODDIR=$libdir/varnish/vmods
+	VMODDIR=`pkg-config --variable=vmoddir varnishapi`
+	if test "x$VMODDIR" = x; then
+		AC_MSG_FAILURE([Can't determine vmod installation directory])
+	fi
 fi
 
 AC_CONFIG_FILES([