On 29 January 2015 at 16:20, Jef Driesen <j...@libdivecomputer.org> wrote:
> FORCE:
> $(top_srcdir)/revision: FORCE
> @if (test -d $(top_srcdir)/.git && cd $(top_srcdir) \
> && git rev-parse --verify HEAD) > revision-t 2>/dev/null \
> && ! cmp -s revision-t $@; then \
> mv -f revision-t $@; \
> else \
> rm -f revision-t; \
> if ! test -f $@; then touch $@; fi; \
> fi
>
here is my very simple take on the the different scenarios:
- not having .git
- git command is not installed
- version.h does not exists even if tarballed (if so fill it it a
hardcoded version)
---------------
DEFAULT_VERSION=4.4
GIT_ERROR=0
GIT_DIR_ERROR=$(shell ls .git 2> /dev/null)
GIT_CMD_ERROR=$(shell git --version 2> /dev/null)
ifeq ($(GIT_DIR_ERROR),)
GIT_ERROR=1
endif
ifeq ($(GIT_CMD_ERROR),)
GIT_ERROR=1
endif
all: main.exe
.PHONY: persist
version.h: persist
ifeq ($(GIT_ERROR),0)
@echo GIT OK
cat $@ 2> /dev/null || git rev-parse HEAD > $@
git rev-parse HEAD > $@.tmp
diff -q $@ $@.tmp || cp $@.tmp $@
rm -f $@.tmp
else
@echo GIT ERROR
cat $@ 2> /dev/null || echo $(DEFAULT_VERSION) > $@
endif
main.o: main.c version.h
gcc -c main.c -o main.o
main.exe: main.o
gcc main.o -o main.exe
---------------
i'm not using "if, then;, fi" inside the rule, because never go these
to work with my MSYS /bin/sh and MINGW's make.
lubomir
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