re PR bootstrap/30899 (build failure with --enable-generated-files-in-srcdir)

	PR bootstrap/30899
	* Make-lang.in (doc/g++.1): Use $< to specify the location from
	which to copy.

From-SVN: r122890

gcc/cp/ChangeLog

+2007-03-13  Mark Mitchell  <mark@codesourcery.com>
+
+	PR bootstrap/30899
+	* Make-lang.in (doc/g++.1): Use $< to specify the location from
+	which to copy.
+
 2007-03-12  Seongbae Park <seongbae.park@gmail.com>
 
 	* decl.c (compute_array_index_type): New warning flag warn_vla.

gcc/cp/Make-lang.in

@@ -176,7 +176,7 @@ c++.install-common: installdirs
 # We can't use links because not everyone supports them, and we can't use
 # .so because Irix 6.5 doesn't support them.  So just copy the manpage.
 doc/g++.1: doc/gcc.1
-	cp doc/gcc.1 doc/g++.1
+	cp $< doc/g++.1
 
 c++.install-man: $(DESTDIR)$(man1dir)/$(GXX_INSTALL_NAME)$(man1ext)