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Commit 880f4499 authored by Arnaud Lacombe's avatar Arnaud Lacombe
Browse files

genksyms: migrate parser to implicit rules 



Signed-off-by: default avatarArnaud Lacombe <lacombar@gmail.com>
parent 6b19e7e4

scripts/genksyms/.gitignore

+4 −3
Original line number Diff line number Diff line 
keywords.c

lex.c

parse.[ch]

*.hash.c

*.lex.c

*.tab.c

*.tab.h

genksyms

scripts/genksyms/Makefile

+3 −43
Original line number Diff line number Diff line
@@ -2,52 +2,12 @@ 
hostprogs-y	:= genksyms

always		:= $(hostprogs-y)



genksyms-objs	:= genksyms.o parse.o lex.o

genksyms-objs	:= genksyms.o parse.tab.o lex.lex.o



# -I needed for generated C source (shipped source)

HOSTCFLAGS_parse.tab.o := -I$(src)

HOSTCFLAGS_lex.lex.o := -I$(src)



# dependencies on generated files need to be listed explicitly

$(obj)/lex.o: $(obj)/parse.h $(obj)/keywords.c

$(obj)/lex.lex.o: $(obj)/keywords.hash.c $(obj)/parse.tab.h

# -I needed for generated C source (shipped source)

HOSTCFLAGS_lex.o := -I$(src)



ifdef GENERATE_PARSER



# gperf



quiet_cmd_keywords.c = GPERF   $@

      cmd_keywords.c = gperf -L ANSI-C -a -C -E -g -H is_reserved_hash	\

		       -k 1,3,$$ -N is_reserved_word -p -t $< > $@



$(obj)/keywords.c: $(obj)/keywords.gperf FORCE

	$(call if_changed,keywords.c)

	cp $@ $@_shipped



# flex



quiet_cmd_lex.c = FLEX    $@

      cmd_lex.c = flex -o$@ -d $<



$(obj)/lex.c: $(obj)/lex.l $(obj)/keywords.c FORCE

	$(call if_changed,lex.c)

	cp $@ $@_shipped



# bison



quiet_cmd_parse.c = BISON   $@

      cmd_parse.c = bison -o$@ -dtv $(filter-out FORCE,$^)



$(obj)/parse.c: $(obj)/parse.y FORCE

	$(call if_changed,parse.c)

	cp $@ $@_shipped

	cp $(@:.c=.h) $(@:.c=.h)_shipped



$(obj)/parse.h: $(obj)/parse.c ;



clean-files	+= parse.output



endif



targets += keywords.c lex.c parse.c parse.h

scripts/genksyms/lex.l

+2 −2
Original line number Diff line number Diff line
@@ -29,7 +29,7 @@ 
#include <ctype.h>



#include "genksyms.h"

#include "parse.h"

#include "parse.tab.h"



/* We've got a two-level lexer here.  We let flex do basic tokenization

   and then we categorize those basic tokens in the second stage.  */
@@ -94,7 +94,7 @@ MC_TOKEN ([~%^&*+=|<>/-]=)|(&&)|("||")|(->)|(<<)|(>>) 


/* Bring in the keyword recognizer.  */



#include "keywords.c"

#include "keywords.hash.c"





/* Macros to append to our phrase collection list.  */