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make: Rebuild version if git commit id is changed

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Original message from Tycho:

This might be a slightly controversial change since it always causes crtools.h
to be rebuilt, which may be annoying. However, right now version.h is only
generated on the initial git build and never again touched, which is also
incorrect.

We could potentially do something fancy by monitoring .git/HEAD for changes,
but since it may not always exist if building from a tarball, it is a little
sticky.

CC: Andersen <tycho.andersen@canonical.com>
CC: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Cyrill Gorcunov 2015-04-16 15:13:26 +03:00 • committed by Pavel Emelyanov
parent 58ef9bc4f2
commit 1b406338d2
2 changed files with 13 additions and 1 deletions
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1
.gitignore vendored
View file

@ -30,3 +30,4 @@ include/config.h
protobuf-desc-gen.h
criu.pc
build
.gitid

13
scripts/Makefile.version
View file

@ -1,12 +1,23 @@
CRTOOLSVERSION := $(VERSION_MAJOR)$(if $(VERSION_MINOR),.$(VERSION_MINOR))$(if $(VERSION_SUBLEVEL),.$(VERSION_SUBLEVEL))
VERSION_HEADER := include/version.h
GITID_FILE := .gitid
GITID := $(shell if [ -d ".git" ]; then git describe; fi)
ifeq ($(GITID),)
GITID := 0
else
GITID_FILE_VALUE := $(shell if [ `cat .gitid` = $(GITID) ]; then echo y; fi)
ifneq ($(GITID_FILE_VALUE),y)
.PHONY: $(GITID_FILE)
endif
endif
$(VERSION_HEADER): Makefile scripts/Makefile.version
$(GITID_FILE):
$(E) " GEN " $@
$(Q) echo "$(GITID)" > $(GITID_FILE)
$(VERSION_HEADER): Makefile scripts/Makefile.version $(GITID_FILE)
$(E) " GEN " $@
$(Q) echo "/* Autogenerated, do not edit */" > $(VERSION_HEADER)
$(Q) echo "#ifndef __CR_VERSION_H__" >> $(VERSION_HEADER)