From c9bd26a34d5c8f649109332aa2eea823c783fdcb Mon Sep 17 00:00:00 2001
From: Werner Almesberger <werner@almesberger.net>
Date: Tue, 22 May 2012 16:09:22 -0300
Subject: [PATCH] b2/Makefile: generate dependencies also for YACC- and
 LEX-generated files

We need explicit rules to compile lex.yy.c and y.tab.c for the relaxed
CFLAGS. However, this means that the implicit rule was not used and
therefore no dependencies were generated.
---
 b2/Makefile | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/b2/Makefile b/b2/Makefile
index 9479ca2..f1cc9f8 100644
--- a/b2/Makefile
+++ b/b2/Makefile
@@ -46,6 +46,12 @@ else
 	DEPEND	= $(DEPEND_quiet)
 endif
 
+MKDEP = $(DEPEND) $(1).c | \
+	sed -e \
+	'/^\(.*:\)\? */{p;s///;s/ *\\\?$$/ /;s/  */:\n/g;H;}' \
+	  -e '$${g;p;}' -e d >$(1).d; \
+	[ "$${PIPESTATUS[*]}" = "0 0" ] || { rm -f $(1).d; exit 1; }
+
 .PHONY:	all clean spotless try
 
 all:		boom
@@ -58,20 +64,18 @@ lex.yy.c:	lang.l y.tab.h
 
 lex.yy.o:	lex.yy.c y.tab.h
 		$(CC) -c $(CFLAGS) $(SLOPPY) lex.yy.c
+		$(call MKDEP, lex.yy)
 
 y.tab.c y.tab.h: lang.y
 		$(YACC) $(YYFLAGS) -d lang.y
 
 y.tab.o:	y.tab.c
 		$(CC) -c $(CFLAGS) $(SLOPPY) y.tab.c
+		$(call MKDEP, y.tab)
 
 %.o:		%.c
 		$(CC) -c $(CFLAGS) $*.c -o $*.o
-		$(DEPEND) $*.c | \
-		  sed -e \
-		    '/^\(.*:\)\? */{p;s///;s/ *\\\?$$/ /;s/  */:\n/g;H;}' \
-		    -e '$${g;p;}' -e d >$*.d; \
-		  [ "$${PIPESTATUS[*]}" = "0 0" ] || { rm -f $*.d; exit 1; }
+		$(call MKDEP, $*)
 
 -include $(OBJS:.o=.d)