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

@@ -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'