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Convert the bison-output-checked-into-cvs makefile handling stuff to work

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like the flex stuff, which actually works when people do cvs updates and
get conflicts in the updated checked in file.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26205 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-02-15 07:16:57 +00:00
parent 45090476be
commit 6599c75ccc
1 changed files with 16 additions and 3 deletions
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19
Makefile.rules
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@ -1252,6 +1252,8 @@ ifneq ($(YaccFiles),)
.PRECIOUS: $(YaccOutput)
all:: $(YaccFiles:%.l=$(PROJ_SRC_DIR)/%.cpp.cvs)
# Cancel built-in rules for yacc
%.c: %.y
%.cpp: %.y
@ -1265,10 +1267,21 @@ $(PROJ_SRC_DIR)/%.cpp $(PROJ_SRC_DIR)/%.h : $(PROJ_SRC_DIR)/%.y
$(Verb) $(MV) -f $*.tab.h $(PROJ_SRC_DIR)/$*.h
$(Echo) "*** DON'T FORGET TO CHECK IN $*.cpp and $*.h (generated files)"
YaccObjs := $(patsubst %.y,$(ObjDir)/%.o,$(YaccFiles))
$(YaccObjs): $(ObjDir)/%.o : $(PROJ_SRC_DIR)/%.cpp
# IFF the .y file has changed since it was last checked into CVS, copy the .y
# file to .y.cvs and the generated .cpp/.h file to .cpp.cvs/.h.cvs. We use this
# mechanism so that people without flex can build LLVM by copying the .cvs files
# to the source location and building them.
$(YaccFiles:%.y=$(PROJ_SRC_DIR)/%.cpp.cvs): \
$(PROJ_SRC_DIR)/%.cpp.cvs: $(PROJ_SRC_DIR)/%.cpp
$(Verb) $(CMP) -s $@ $< || \
($(CP) $< $@; \
$(CP) $(PROJ_SRC_DIR)/$*.l $(PROJ_SRC_DIR)/$*.l.cvs; \
$(CP) $(PROJ_SRC_DIR)/$*.h $(PROJ_SRC_DIR)/$*.h.cvs)
YaccOutput := $(addprefix $(patsubst %.y,%,$(YaccFiles)),.output)
$(YaccFiles:%.y=$(ObjDir)/%.o): $(ObjDir)/%.o : $(PROJ_SRC_DIR)/%.cpp
YaccOutput := $(YaccFiles:%.y=%.output)
clean-local::
-$(Verb) $(RM) -f $(YaccOutput)