[PATCH 1/2] Makefile target to support just libvolume_id

[PATCH 1/2] Makefile target to support just libvolume_id

[Dan Nicholson]

Some external programs such as util-linux-ng depend on just libvolume_id
and not the full udev installation. Specific Makefile targets are created
to directly build and install the library without passing many variables
to make. Usage is straightforward:
    $ make libvolume_id
    $ make install-libvolume_id

Signed-off-by: Dan Nicholson <dbn.lists@gmail.com>
---
 Makefile |   17 +++++++++++++++++
 README   |    5 +++++
 2 files changed, 22 insertions(+), 0 deletions(-)

diff --git a/Makefile b/Makefile
index 0c143d6..3b0f9d2 100644
--- a/Makefile
+++ b/Makefile
@@ -310,6 +310,23 @@ install: all install-bin install-config install-man
 uninstall: uninstall-bin uninstall-man
 .PHONY: uninstall
 
+# Special targets to build just libvolume_id
+libvolume_id:
+	$(MAKE) CC="$(CC)" \
+		CFLAGS="$(CFLAGS)" \
+		LD="$(LD)" \
+		LDFLAGS="$(LDFLAGS)" \
+		AR="$(AR)" \
+		RANLIB="$(RANLIB)" \
+		LIB_OBJS="$(LIB_OBJS)" \
+		LIBUDEV="$(PWD)/$(LIBUDEV)" \
+		-C extras/volume_id/lib
+.PHONY: libvolume_id
+
+install-libvolume_id: libvolume_id
+	$(MAKE) -C extras/volume_id/lib install
+.PHONY: install-libvolume_id
+
 test tests: all
 	@ cd test && ./udev-test.pl
 	@ cd test && ./udevstart-test.pl
diff --git a/README b/README
index b37d0d5..606afbc 100644
--- a/README
+++ b/README
@@ -89,6 +89,11 @@ Installation:
     software that depends on the data udev has collected from the devices
     and should be installed by default with every udev installation.
 
+  - There is a specific target for building and installing libvolume_id to
+    support external programs that do not require the full udev install.
+    This can be performed with `make libvolume_id' and
+    `make install-libvolume_id'.
+
 Please direct any comment/question/concern to the linux-hotplug-devel mailing list at:
   linux-hotplug-devel@lists.sourceforge.net
 
-- 
1.5.3.2


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