[librsvg] Fix symlink creation for rsvg-view and rsvg-convert

[Christian Persch <chpe src gnome org>]

commit 2fc0b201ca40c0d736451565fb2aa3aeb4d121a8
Author: Christian Persch <chpe gnome org>
Date:   Tue Jun 22 15:51:54 2010 +0200

    Fix symlink creation for rsvg-view and rsvg-convert
    
    Only create the symlinks when it doesn't already exist.

 Makefile.am |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 578ffae..9da9c7a 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -169,6 +169,6 @@ DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
 
 if GTK_API_VERSION_2
 install-exec-hook:
-	(cd $(DESTDIR)$(bindir) && $(LN_S) rsvg-convert-2 rsvg-convert)
-	(cd $(DESTDIR)$(bindir) && $(LN_S) rsvg-view-2 rsvg-view)
+	@test -e "$(DESTDIR)$(bindir)/rsvg-convert" || (cd $(DESTDIR)$(bindir) && $(LN_S) rsvg-convert-2 rsvg-convert)
+	@test -e "$(DESTDIR)$(bindir)/rsvg-view" || (cd $(DESTDIR)$(bindir) && $(LN_S) rsvg-view-2 rsvg-view)
 endif