[PATCH rt-tests RFC] install: Fix failed to create symbolic link hwlatdetect file exists

[John Kacur <jkacur@redhat.com>]

The following build error can occur if you have done a previous make install

if test -n "/usr/lib/python2.7/site-packages" ; then \
	install -D -m 755 src/hwlatdetect/hwlatdetect.py /usr/lib/python2.7/site-packages/hwlatdetect.py ; \
	ln -s /usr/lib/python2.7/site-packages/hwlatdetect.py "/usr/local/bin/hwlatdetect" ; \
fi
ln: failed to create symbolic link `/usr/local/bin/hwlatdetect': File exists
make: *** [install] Error 1

I initially wanted to fix the error by removing the symbolic link, with rm -rf
but Andrew Burgess pointed out that you can just use the
ln's -f (force) flag. I like that solution better.

Suggested-by: Andrew Burgess <aab@cichlid.com>
Signed-off-by: John Kacur <jkacur@redhat.com>
---
 Makefile |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index ff697ca..a143545 100644
--- a/Makefile
+++ b/Makefile
@@ -125,7 +125,7 @@ install: all
 	cp $(TARGETS) "$(DESTDIR)$(bindir)"
 	if test -n "$(PYLIB)" ; then \
 		install -D -m 755 src/hwlatdetect/hwlatdetect.py $(DESTDIR)$(PYLIB)/hwlatdetect.py ; \
-		ln -s $(PYLIB)/hwlatdetect.py "$(DESTDIR)$(bindir)/hwlatdetect" ; \
+		ln -sf $(PYLIB)/hwlatdetect.py "$(DESTDIR)$(bindir)/hwlatdetect" ; \
 	fi
 	install -D -m 644 src/backfire/backfire.c "$(DESTDIR)$(srcdir)/backfire/backfire.c"
 	install -m 644 src/backfire/Makefile "$(DESTDIR)$(srcdir)/backfire/Makefile"
-- 
1.7.7.6