From cf8dfd15e5fb280fa1e79e1d373456cb1e701222 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Sun, 21 Jul 2019 01:27:40 +0900 Subject: kbuild: move flex and bison rules to Makefile.host Flex and bison are used for kconfig, dtc, genksyms, all of which are host programs. I never imagine the kernel embeds a parser or a lexer. Move the flex and bison rules to scripts/Makefile.host. This file is included only when hostprogs-y etc. is present in the Makefile in the directory. So, parsing these rules are skipped in most of directories. Signed-off-by: Masahiro Yamada --- scripts/Makefile.host | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'scripts/Makefile.host') diff --git a/scripts/Makefile.host b/scripts/Makefile.host index 2208ebbd8c4c..b402c619147d 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -1,4 +1,21 @@ # SPDX-License-Identifier: GPL-2.0 + +# LEX +# --------------------------------------------------------------------------- +quiet_cmd_flex = LEX $@ + cmd_flex = $(LEX) -o$@ -L $< + +$(obj)/%.lex.c: $(src)/%.l FORCE + $(call if_changed,flex) + +# YACC +# --------------------------------------------------------------------------- +quiet_cmd_bison = YACC $(basename $@).[ch] + cmd_bison = $(YACC) -o $(basename $@).c --defines=$(basename $@).h -t -l $< + +$(obj)/%.tab.c $(obj)/%.tab.h: $(src)/%.y FORCE + $(call if_changed,bison) + # ========================================================================== # Building binaries on the host system # Binaries are used during the compilation of the kernel, for example -- cgit v1.2.3