[PATCH] kconfig: use gperf for kconfig keywords
Use gperf to generate a hash for the kconfig keywords. This greatly reduces
the size of the generated scanner and makes it easier to extend kconfig.
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 65e3e73..9d67782 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -114,7 +114,7 @@
endif
clean-files := lkc_defs.h qconf.moc .tmp_qtcheck \
- .tmp_gtkcheck zconf.tab.c lex.zconf.c
+ .tmp_gtkcheck zconf.tab.c lex.zconf.c zconf.hash.c
# Needed for systems without gettext
KBUILD_HAVE_NLS := $(shell \
@@ -201,7 +201,7 @@
fi
endif
-$(obj)/zconf.tab.o: $(obj)/lex.zconf.c
+$(obj)/zconf.tab.o: $(obj)/lex.zconf.c $(obj)/zconf.hash.c
$(obj)/kconfig_load.o: $(obj)/lkc_defs.h
@@ -217,7 +217,7 @@
###
-# The following requires flex/bison
+# The following requires flex/bison/gperf
# By default we use the _shipped versions, uncomment the following line if
# you are modifying the flex/bison src.
# LKC_GENPARSER := 1
@@ -226,6 +226,7 @@
$(obj)/zconf.tab.c: $(src)/zconf.y
$(obj)/lex.zconf.c: $(src)/zconf.l
+$(obj)/zconf.hash.c: $(src)/zconf.gperf
%.tab.c: %.y
bison -l -b $* -p $(notdir $*) $<
@@ -235,4 +236,8 @@
flex -L -P$(notdir $*) -o$@ $<
cp $@ $@_shipped
+%.hash.c: %.gperf
+ gperf < $< > $@
+ cp $@ $@_shipped
+
endif