Skip building btrfs support if library isn't installed

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>

Makefile

@@ -11,7 +11,7 @@ LIBEXECDIR ?= ${PREFIX}/libexec
 MANDIR ?= ${PREFIX}/share/man
 ETCDIR ?= ${DESTDIR}/etc
 ETCDIR_CRIO ?= ${ETCDIR}/crio
-BUILDTAGS ?= selinux seccomp $(shell hack/btrfs_tag.sh) $(shell hack/libdm_tag.sh)
+BUILDTAGS ?= selinux seccomp $(shell hack/btrfs_tag.sh) $(shell hack/libdm_tag.sh) $(shell hack/btrfs_installed_tag.sh)
 BASHINSTALLDIR=${PREFIX}/share/bash-completion/completions
 OCIUMOUNTINSTALLDIR=$(PREFIX)/share/oci-umount/oci-umount.d
 

contrib/test/integration/e2e.yml

@@ -48,6 +48,9 @@
             &> {{ artifacts }}/e2e.log
   # Fix vim syntax hilighting: "
 
+- name: disable SELinux
+  command: setenforce 0
+
 - name: run e2e tests
   shell: "{{ e2e_shell_cmd | regex_replace('\\s+', ' ') }}"
   args:

hack/btrfs_installed_tag.sh

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