[llvm-commits] CVS: llvm/Makefile.common
Chris Lattner
lattner at cs.uiuc.edu
Mon Aug 4 14:48:04 PDT 2003
Changes in directory llvm:
Makefile.common updated: 1.103 -> 1.104
---
Log message:
* Don't print out HOW we are running Flex unless in verbose mode. We already
hide the bison command line.
* If running flex or bison gives us the files we already have, don't overwrite
the ones we have, which cause unnecessary compilation. I demand the ability
to make meaningless changes without penalty!
---
Diffs of the changes:
Index: llvm/Makefile.common
diff -u llvm/Makefile.common:1.103 llvm/Makefile.common:1.104
--- llvm/Makefile.common:1.103 Thu Jul 31 15:58:51 2003
+++ llvm/Makefile.common Mon Aug 4 14:47:06 2003
@@ -766,10 +766,15 @@
# FIXME. (f.e. char Buffer[10000]; )
#
%.cpp: %.l
- $(FLEX) -t $< | $(SED) '/^find_rule/d' | \
+ @echo Flex\'ing $<...
+ $(VERB) $(FLEX) -t $< | $(SED) '/^find_rule/d' | \
$(SED) 's/void yyunput/inline void yyunput/' | \
$(SED) 's/void \*yy_flex_realloc/inline void *yy_flex_realloc/' | \
- $(SED) 's/#define YY_BUF_SIZE 16384/#define YY_BUF_SIZE (16384*64)/' > $@
+ $(SED) 's/#define YY_BUF_SIZE 16384/#define YY_BUF_SIZE (16384*64)/' \
+ > $@.tmp
+ $(VERB) diff -q $@ $@.tmp || ${MV} -f $@.tmp $@
+ @# remove the output of flex if it didn't get moved over...
+ @rm -f $@.tmp
# Rule for building the bison parsers...
%.c: %.y # Cancel built-in rules for yacc
@@ -777,8 +782,10 @@
%.cpp %.h : %.y
@echo Bison\'ing $<...
$(VERB) $(BISON) -v -d -p $(<:%Parser.y=%) $*.y
- $(VERB) ${MV} -f $*.tab.c $*.cpp
- $(VERB) ${MV} -f $*.tab.h $*.h
+ $(VERB) diff -q $*.tab.c $*.cpp || ${MV} -f $*.tab.c $*.cpp
+ $(VERB) diff -q $*.tab.h $*.h || ${MV} -f $*.tab.h $*.h
+ @# If the files were not updated, don't leave them lying around...
+ @rm -f $*.tab.c $*.tab.h
# To create the directories...
%/.dir:
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