diff options
Diffstat (limited to 'Makefile')
| -rw-r--r-- | Makefile | 30 |
1 files changed, 5 insertions, 25 deletions
@@ -60,35 +60,15 @@ TEST=$(if $(wildcard /usr/bin/test),/usr/bin/test,test) # can mean a lot of unnecessary recompilation after a re-configure, so # here we cache the old versions of these files so we can restore the # timestamps. -# -define check-configure-file -# $1 = file -if $(TEST) ! -f $1.old; then \ - echo "backing up $1"; \ - cp $1 $1.old; \ - touch -r $1 $1.old; \ -else \ - if $(TEST) $1 -nt $1.old; then \ - if cmp $1 $1.old; then \ - echo "$1 has been touched, but has not changed"; \ - touch -r $1.old $1; \ - else \ - echo "$1 has changed"; \ - cp $1 $1.old; \ - touch -r $1 $1.old; \ - fi \ - fi \ -fi -endef +%.old: % + @set -x && [ -f $@ ] && cmp -s $< $@ || cp -p $< $@ + touch -r $@ $< + # NB. not the same as saying '%: ...', which doesn't do the right thing: # it does nothing if we specify a target that already exists. .PHONY: $(REALGOALS) -$(REALGOALS) all: - @$(call check-configure-file,mk/config.mk) - @$(call check-configure-file,mk/project.mk) - @$(call check-configure-file,compiler/ghc.cabal) - +$(REALGOALS) all: mk/config.mk.old mk/project.mk.old compiler/ghc.cabal.old @echo "===--- updating makefiles phase 0" $(MAKE) -r --no-print-directory -f ghc.mk phase=0 just-makefiles ifneq "$(OMIT_PHASE_1)" "YES" |