'make ivtv' requires subversion

From: Michael Krufky <mkrufky@linuxtv.org>

- inform the user that subversion is required to retreive the ivtv sources.
- added 'make ivtv-update'

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/v4l/Makefile b/v4l/Makefile
index f3e7d3526..d0c0515ad 100644
--- a/v4l/Makefile
+++ b/v4l/Makefile
@@ -351,9 +351,14 @@ pvrusb2-unmerge::
 
 ivtv-checkout::
 	@if [ ! -d ivtv ]; then \
+		echo retrieving the latest ivtv sources from ivtvdriver.org; \
+		echo this step requires subversion to be installed; \
 		svn co http://ivtvdriver.org/svn/ivtv/trunk ivtv; \
 	fi
 
+ivtv-update ivtv-up:: ivtv-checkout
+	@svn up ivtv
+
 ivtv-links:: ivtv-checkout
 	@echo creating ivtv symbolic links...
 	@find ivtv/driver -name '*.[c,h]' -type f -exec ln -sf '{}' . \;