1 files changed, 53 insertions, 0 deletions
diff --git a/scripts/genksyms/Makefile b/scripts/genksyms/Makefile
new file mode 100644
index 00000000..e420fe44
--- /dev/null
+++ b/scripts/genksyms/Makefile
@@ -0,0 +1,53 @@
+
+hostprogs-y	:= genksyms
+always		:= $(hostprogs-y)
+
+genksyms-objs	:= genksyms.o parse.o lex.o
+
+# -I needed for generated C source (shipped source)
+HOSTCFLAGS_parse.o := -Wno-uninitialized -I$(src)
+
+# dependencies on generated files need to be listed explicitly
+$(obj)/lex.o: $(obj)/parse.h $(obj)/keywords.c
+
+# -I needed for generated C source (shipped source)
+HOSTCFLAGS_lex.o := -I$(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 $< $(obj)/parse.h
+
+$(obj)/lex.c: $(obj)/lex.l $(obj)/parse.h $(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