$OpenBSD: patch-gcc_Makefile_in,v 1.1 2018/10/02 12:17:30 espie Exp $
This makes sure info does not get implicit rules, such as info.c in 
a subdirectory

Index: gcc/Makefile.in
--- gcc/Makefile.in.orig
+++ gcc/Makefile.in
@@ -2491,6 +2491,8 @@ docdir = $(srcdir)/doc
 doc: $(BUILD_INFO) $(GENERATED_MANPAGES) gccbug
 info: cpp.info gcc.info gccint.info gccinstall.info lang.info cppinternals.info
 
+.PHONY: doc info
+
 TEXI_CPP_FILES = $(docdir)/cpp.texi $(docdir)/include/fdl.texi \
   $(docdir)/cppenv.texi $(docdir)/cppopts.texi
 
