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-rw-r--r--scripts/Makefile.lib20
1 files changed, 17 insertions, 3 deletions
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index ee528e30f80f..0f9ef3fbbaf5 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -186,8 +186,6 @@ $(foreach m, $(notdir $1), \
$(addprefix $(obj)/, $(foreach s, $3, $($(m:%$(strip $2)=%$(s)))))))
endef
-ifdef REGENERATE_PARSERS
-
# LEX
# ---------------------------------------------------------------------------
LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
@@ -195,9 +193,15 @@ LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
quiet_cmd_flex = LEX $@
cmd_flex = $(LEX) -o$@ -L -P $(LEX_PREFIX) $<
+ifdef REGENERATE_PARSERS
.PRECIOUS: $(src)/%.lex.c_shipped
$(src)/%.lex.c_shipped: $(src)/%.l
$(call cmd,flex)
+endif
+
+.PRECIOUS: $(obj)/%.lex.c
+$(filter %.lex.c,$(targets)): $(obj)/%.lex.c: $(src)/%.l FORCE
+ $(call if_changed,flex)
# YACC
# ---------------------------------------------------------------------------
@@ -206,19 +210,29 @@ YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
quiet_cmd_bison = YACC $@
cmd_bison = $(YACC) -o$@ -t -l -p $(YACC_PREFIX) $<
+ifdef REGENERATE_PARSERS
.PRECIOUS: $(src)/%.tab.c_shipped
$(src)/%.tab.c_shipped: $(src)/%.y
$(call cmd,bison)
+endif
+
+.PRECIOUS: $(obj)/%.tab.c
+$(filter %.tab.c,$(targets)): $(obj)/%.tab.c: $(src)/%.y FORCE
+ $(call if_changed,bison)
quiet_cmd_bison_h = YACC $@
cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
+ifdef REGENERATE_PARSERS
.PRECIOUS: $(src)/%.tab.h_shipped
$(src)/%.tab.h_shipped: $(src)/%.y
$(call cmd,bison_h)
-
endif
+.PRECIOUS: $(obj)/%.tab.h
+$(filter %.tab.h,$(targets)): $(obj)/%.tab.h: $(src)/%.y FORCE
+ $(call if_changed,bison_h)
+
# Shipped files
# ===========================================================================