From b3e29926cef104c9ef99ff05ed1490cf821bb7b0 Mon Sep 17 00:00:00 2001
From: Vivek Goyal <vgoyal@redhat.com>
Date: Tue, 21 Apr 2015 18:14:59 -0400
Subject: [PATCH] make.sh: Define a new build tag libdm_no_deferred_remove

libdm started offering deferred remove functionality from version
1.02.89. As docker still builds against older libdm, define a tag
libdm_no_deferred_remove to determine whether we are compiling
against new libdm or older one and enable/disable deferred remove
functionality accordingly.

Signed-off-by: Vincent Batts <vbatts@redhat.com>
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
---
 hack/make.sh | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/hack/make.sh b/hack/make.sh
index 3bcb265b3c..aa98ef128d 100755
--- a/hack/make.sh
+++ b/hack/make.sh
@@ -107,6 +107,15 @@ if \
 	DOCKER_BUILDTAGS+=' btrfs_noversion'
 fi
 
+# test whether "libdevmapper.h" is new enough to support deferred remove
+# functionality.
+if \
+	command -v gcc &> /dev/null \
+	&& ! ( echo -e  '#include <libdevmapper.h>\nint main() { dm_task_deferred_remove(NULL); }'| gcc -ldevmapper -xc - &> /dev/null ) \
+; then
+       DOCKER_BUILDTAGS+=' libdm_no_deferred_remove'
+fi
+
 # Use these flags when compiling the tests and final binary
 
 IAMSTATIC='true'