Add build tags for integration tests

Add the necessary build tags and configuration so that integration tests
can properly build against device mapper and btrfs libraries.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

Dockerfile

@@ -20,6 +20,9 @@ RUN apt-get update && apt-get install -y \
     python-minimal \
     libglib2.0-dev \
     libapparmor-dev \
+    btrfs-tools \
+    libdevmapper1.02.1 \
+    libdevmapper-dev \
     --no-install-recommends \
     && apt-get clean
 

Makefile

@@ -16,7 +16,7 @@ ETCDIR ?= ${DESTDIR}/etc
 ETCDIR_OCID ?= ${ETCDIR}/ocid
 GO_MD2MAN ?= $(shell which go-md2man)
 export GOPATH := ${CURDIR}/vendor
-BUILDTAGS := selinux seccomp
+BUILDTAGS := selinux seccomp $(shell hack/btrfs_tag.sh) $(shell hack/libdm_tag.sh)
 BASHINSTALLDIR=${PREFIX}/share/bash-completion/completions
 
 all: binaries ocid.conf docs

hack/btrfs_tag.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+cc -E - > /dev/null 2> /dev/null << EOF
+#include <btrfs/version.h>
+EOF
+if test $? -ne 0 ; then
+	echo btrfs_noversion
+fi

hack/libdm_tag.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+tmpdir="$PWD/tmp.$RANDOM"
+mkdir -p "$tmpdir"
+trap 'rm -fr "$tmpdir"' EXIT
+cc -c -o "$tmpdir"/libdm_tag.o -x c - > /dev/null 2> /dev/null << EOF
+#include <libdevmapper.h>
+int main() {
+	struct dm_task *task;
+	return 0;
+}
+EOF
+if test $? -ne 0 ; then
+	echo libdm_no_deferred_remove
+fi