Out-of-tree vmod skeleton

Makefile.am

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+ACLOCAL_AMFLAGS = -I m4
+
+SUBDIRS = src

README

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+This is an example skeleton for developing out-of-tree Varnish vmods.
+
+When running configure, specify the location of your Varnish source tree like this:
+./configure VARNISHSRC=DIR
+
+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).

autogen.sh

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+#!/bin/sh
+
+warn() {
+	echo "WARNING: $@" 1>&2
+}
+
+case `uname -s` in
+Darwin)
+	LIBTOOLIZE=glibtoolize
+	;;
+FreeBSD)
+	LIBTOOLIZE=libtoolize
+	;;
+Linux)
+	LIBTOOLIZE=libtoolize
+	;;
+SunOS)
+	LIBTOOLIZE=libtoolize
+	;;
+*)
+	warn "unrecognized platform:" `uname -s`
+	LIBTOOLIZE=libtoolize
+esac
+
+automake_version=`automake --version | tr ' ' '\n' | egrep '^[0-9]\.[0-9a-z.-]+'`
+if [ -z "$automake_version" ] ; then
+	warn "unable to determine automake version"
+else
+	case $automake_version in
+		0.*|1.[0-8]|1.[0-8][.-]*)
+			warn "automake ($automake_version) detected; 1.9 or newer recommended"
+			;;
+		*)
+			;;
+	esac
+fi
+
+set -ex
+
+aclocal -I m4
+$LIBTOOLIZE --copy --force
+autoheader
+automake --add-missing --copy --foreign
+autoconf

configure.ac

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+AC_PREREQ(2.59)
+AC_COPYRIGHT([Copyright (c) 2011 Varnish Software AS])
+AC_INIT([libvmod_example], [0.1])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_SRCDIR(src/vmod.vcc)
+AM_CONFIG_HEADER(config.h)
+
+AC_CANONICAL_SYSTEM
+AC_LANG(C)
+
+AM_INIT_AUTOMAKE([foreign])
+
+AC_GNU_SOURCE
+AC_PROG_CC
+AC_PROG_CC_STDC
+if test "x$ac_cv_prog_cc_c99" = xno; then
+	AC_MSG_ERROR([Could not find a C99 compatible compiler])
+fi
+AC_PROG_CPP
+
+AC_PROG_INSTALL
+AC_PROG_LIBTOOL
+AC_PROG_MAKE_SET
+
+# Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS([sys/stdlib.h])
+
+# Check for python
+AC_CHECK_PROGS(PYTHON, [python3 python3.1 python3.2 python2.7 python2.6 python2.5 python2 python], [AC_MSG_ERROR([Python is needed to build this vmod, please install python.])])
+
+# Varnish source tree
+AC_ARG_VAR([VARNISHSRC], [path to Varnish source tree (mandatory)])
+if test "x$VARNISHSRC" = x; then
+	AC_MSG_ERROR([No Varnish source tree specified])
+fi
+AC_CHECK_FILE([$VARNISHSRC/include/varnishapi.h],
+	[],
+	[AC_MSG_FAILURE(["$VARNISHSRC" is not a Varnish source directory])]
+)
+
+# vmod installation dir
+AC_ARG_VAR([VMODDIR], [vmod installation directory @<:@LIBDIR/varnish/vmods@:>@])
+if test "x$VMODDIR" = x; then
+	VMODDIR=$libdir/varnish/vmods
+fi
+
+AC_CONFIG_FILES([
+	Makefile
+	src/Makefile
+])
+AC_OUTPUT

src/Makefile.am

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+INCLUDES = -I$(VARNISHSRC)/include -I$(VARNISHSRC)
+
+vmoddir = $(VMODDIR)
+vmod_LTLIBRARIES = libvmod_example.la
+
+libvmod_example_la_LDFLAGS = -version-info 1:0:0
+
+libvmod_example_la_SOURCES = \
+	vcc_if.c \
+	vcc_if.h \
+	vmod.c
+
+vcc_if.c vcc_if.h: $(VARNISHSRC)/lib/libvmod_std/vmod.py $(top_srcdir)/src/vmod.vcc
+	@PYTHON@ $(VARNISHSRC)/lib/libvmod_std/vmod.py $(top_srcdir)/src/vmod.vcc
+
+EXTRA_DIST = vmod.vcc
+
+CLEANFILES = $(builddir)vcc_if.c $(builddir)/vcc_if.h

src/vmod.c

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+#include <stdlib.h>
+
+#include "vrt.h"
+#include "bin/varnishd/cache.h"
+
+#include "vcc_if.h"
+
+int
+init_function(struct vmod_priv *priv, const struct VCL_conf *conf)
+{
+	return (0);
+}
+
+int
+vmod_abs(struct sess *sp, int val)
+{
+	return (abs(val));
+}

src/vmod.vcc

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+Module example
+Init init_function
+Function INT abs(INT)