From 7373f4f83c71d50f0aece6d94309ab7fde42180f Mon Sep 17 00:00:00 2001
From: Arnaud Lacombe <lacombar@gmail.com>
Date: Mon, 23 May 2011 00:04:43 -0400
Subject: [PATCH] kbuild: add implicit rules for parser generation

Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
---
 scripts/Makefile.lib | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 93b2b5938a2e..b0d0c7a189f7 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -160,6 +160,44 @@ ld_flags       = $(LDFLAGS) $(ldflags-y)
 modname-multi = $(sort $(foreach m,$(multi-used),\
 		$(if $(filter $(subst $(obj)/,,$*.o), $($(m:.o=-objs)) $($(m:.o=-y))),$(m:.o=))))
 
+ifdef REGENERATE_PARSERS
+
+# GPERF
+# ---------------------------------------------------------------------------
+quiet_cmd_gperf = GPERF $@
+      cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
+
+$(src)/%.hash.c_shipped: $(src)/%.gperf
+	$(call cmd,gperf)
+
+# LEX
+# ---------------------------------------------------------------------------
+LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
+
+quiet_cmd_flex = LEX     $@
+      cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
+
+$(src)/%.lex.c_shipped: $(src)/%.l
+	$(call cmd,flex)
+
+# YACC
+# ---------------------------------------------------------------------------
+YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
+
+quiet_cmd_bison = YACC    $@
+      cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
+
+$(src)/%.tab.c_shipped: $(src)/%.y
+	$(call cmd,bison)
+
+quiet_cmd_bison_h = YACC    $@
+      cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
+
+$(src)/%.tab.h_shipped: $(src)/%.y
+	$(call cmd,bison_h)
+
+endif
+
 # Shipped files
 # ===========================================================================
 
-- 
2.39.5