kbuild: add LEX and YACC variables
Allow users to use their favorite lexer / parser generators.
This is useful for me to test various flex and bison versions.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
diff --git a/Makefile b/Makefile
index c988e46..83209d6 100644
--- a/Makefile
+++ b/Makefile
@@ -377,6 +377,8 @@
STRIP = $(CROSS_COMPILE)strip
OBJCOPY = $(CROSS_COMPILE)objcopy
OBJDUMP = $(CROSS_COMPILE)objdump
+LEX = flex
+YACC = bison
AWK = awk
GENKSYMS = scripts/genksyms/genksyms
INSTALLKERNEL := installkernel
@@ -428,7 +430,7 @@
export ARCH SRCARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM STRIP OBJCOPY OBJDUMP HOSTLDFLAGS HOST_LOADLIBES
-export MAKE AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
+export MAKE LEX YACC AWK GENKSYMS INSTALLKERNEL PERL PYTHON UTS_MACHINE
export HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS
export KBUILD_CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 1ca4dcd..ee528e3 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -193,7 +193,7 @@
LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
quiet_cmd_flex = LEX $@
- cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
+ cmd_flex = $(LEX) -o$@ -L -P $(LEX_PREFIX) $<
.PRECIOUS: $(src)/%.lex.c_shipped
$(src)/%.lex.c_shipped: $(src)/%.l
@@ -204,7 +204,7 @@
YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
quiet_cmd_bison = YACC $@
- cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
+ cmd_bison = $(YACC) -o$@ -t -l -p $(YACC_PREFIX) $<
.PRECIOUS: $(src)/%.tab.c_shipped
$(src)/%.tab.c_shipped: $(src)/%.y