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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-07-21 01:27:40 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-08-14 01:10:42 +0900 |
| commit | cf8dfd15e5fb280fa1e79e1d373456cb1e701222 (patch) | |
| tree | d98293942f605d235b741e77d6b9ea3bcdb85e23 /scripts/Makefile.host | |
| parent | 6ba7dc6616ce69ef667204df29597767c1c9ebcf (diff) | |
| download | lwn-cf8dfd15e5fb280fa1e79e1d373456cb1e701222.tar.gz lwn-cf8dfd15e5fb280fa1e79e1d373456cb1e701222.zip | |
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 <yamada.masahiro@socionext.com>
Diffstat (limited to 'scripts/Makefile.host')
| -rw-r--r-- | scripts/Makefile.host | 17 |
1 files changed, 17 insertions, 0 deletions
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 |