Move support for building tags database from Makefile.rules to Makefile, because

it's only used in the top-level directory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10960 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile

@@ -31,8 +31,7 @@ configure: autoconf/configure.ac autoconf/aclocal.m4
 include/Config/config.h.in: autoconf/configure.ac autoconf/aclocal.m4
 	autoheader -I autoconf autoconf/configure.ac
 
-# Install support for llvm include files.
-
+# Install support for llvm include files:
 .PHONY: install-includes
 
 install-includes:
@@ -41,3 +40,13 @@ install-includes:
 
 install:: install-includes
 
+# Build tags database for Emacs/Xemacs:
+.PHONY: tags
+
+TAGS: tags
+
+all:: tags
+
+tags:
+	$(ETAGS) $(ETAGSFLAGS) `find $(wildcard $(SourceDir)/include $(SourceDir)/lib $(SourceDir)/tools) -name '*.cpp' -o -name '*.h'`
+