tools/build: fix pygrub linking

Prevent creating a symlink to $(DESTDIR)/$(BINDIR) if it is the same
as $(PRIVATE_BINDIR)

This fixes NetBSD install, where $(DESTDIR)/$(BINDIR) ==
$(PRIVATE_BINDIR).

Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

diff --git a/tools/pygrub/Makefile b/tools/pygrub/Makefile
index bd22dd41f246dc5c84bf746988c17b9bd3b75adc..8c99e11b68951e3ac8f291a89db25928715e2c53 100644 (file)
--- a/tools/pygrub/Makefile
+++ b/tools/pygrub/Makefile
@@ -14,7 +14,10 @@ install: all
                $(PYTHON_PREFIX_ARG) --root="$(DESTDIR)" \
                --install-scripts=$(PRIVATE_BINDIR) --force
        $(INSTALL_DIR) $(DESTDIR)/var/run/xend/boot
-       ln -sf $(PRIVATE_BINDIR)/pygrub $(DESTDIR)/$(BINDIR)
+       set -e; if [ `readlink -f $(DESTDIR)/$(BINDIR)` != \
+                    `readlink -f $(PRIVATE_BINDIR)` ]; then \
+           ln -sf $(PRIVATE_BINDIR)/pygrub $(DESTDIR)/$(BINDIR); \
+       fi
 
 .PHONY: clean
 clean: