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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2018-12-30 22:59:26 +0900 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-01-03 10:17:16 +0100 |
| commit | 273dbe5f87de8d6129a68ad40e87922fb6e783b6 (patch) | |
| tree | 41f19d7c159df88aa1dee4bff084f3e57dfc18db /scripts/Makefile.lib | |
| parent | c17116dc3818b45cbc3997de72d05e64aab04cbe (diff) | |
| download | barebox-273dbe5f87de8d6129a68ad40e87922fb6e783b6.tar.gz barebox-273dbe5f87de8d6129a68ad40e87922fb6e783b6.tar.xz | |
kbuild: generate lexer and parser during build instead of shipping
Recent kernel versions run flex and bison to generate lexers and
parsers from real source files such as *.l and *.y . This provides
better maintainability than version-controlling pre-generated C files
with a "_shipped" suffix.
This commit imports flex and bison rules from Linux, and deletes
pre-generated parsers and lexers.
Refer to the following commits in Linux:
- 033dba2ec06c ("kbuild: prepare to remove C files pre-generated by
flex and bison")
- 29c833061c1d ("kconfig: generate lexer and parser during build
instead of shipping")
- e039139be8c2 ("scripts/dtc: generate lexer and parser during
build instead of shipping")
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'scripts/Makefile.lib')
| -rw-r--r-- | scripts/Makefile.lib | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 3b4277e5ab..b0f6d68906 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -177,6 +177,32 @@ $(foreach m, $(notdir $1), \ $(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s))))))) endef +# LEX +# --------------------------------------------------------------------------- +LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy) + +quiet_cmd_flex = LEX $@ + cmd_flex = $(LEX) -o$@ -L -P $(LEX_PREFIX) $< + +$(obj)/%.lex.c: $(src)/%.l FORCE + $(call if_changed,flex) + +# YACC +# --------------------------------------------------------------------------- +YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy) + +quiet_cmd_bison = YACC $@ + cmd_bison = $(YACC) -o$@ -t -l -p $(YACC_PREFIX) $< + +$(obj)/%.tab.c: $(src)/%.y FORCE + $(call if_changed,bison) + +quiet_cmd_bison_h = YACC $@ + cmd_bison_h = $(YACC) -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $< + +$(obj)/%.tab.h: $(src)/%.y FORCE + $(call if_changed,bison_h) + # Shipped files # =========================================================================== |