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automake: bring back the .PHONY git_sha1.h.tmp rule

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With earlier commit 3689ef32af ("automake: rework the git_sha1.h rule,
include in tarball") we/I erroneously removed the PHONY rule and the
temporary file.

The former is used to ensure that the header is regenerated when on each
make invocation, while the latter helps us avoid the unneeded rebuild(s)
when the SHA1 hasn't changed.

Reported-by: Grazvydas Ignotas <notasas@gmail.com>
Tested-by: Grazvydas Ignotas <notasas@gmail.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
This commit is contained in:
Emil Velikov 2016-05-31 14:46:19 +01:00 • committed by Emil Velikov
parent f74a29188c
commit af2637aa32
1 changed files with 17 additions and 2 deletions
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19
src/Makefile.am
View file

@ -19,13 +19,28 @@
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
git_sha1.h:
.PHONY: git_sha1.h.tmp
git_sha1.h.tmp:
@# Don't assume that $(top_srcdir)/.git is a directory. It may be
@# a gitlink file if $(top_srcdir) is a submodule checkout or a linked
@# worktree.
@# If we are building from a release tarball copy the bundled header.
@if test -e $(top_srcdir)/.git; then \
if which git > /dev/null; then \
git --git-dir=$(top_srcdir)/.git log -n 1 --oneline | \
sed 's/^\([^ ]*\) .*/#define MESA_GIT_SHA1 "git-\1"/' \
> git_sha1.h ; \
> git_sha1.h.tmp ; \
fi \
else \
cp git_sha1.h git_sha1.h.tmp ;\
fi
git_sha1.h: git_sha1.h.tmp
@echo "updating git_sha1.h"
@if ! cmp -s git_sha1.h.tmp git_sha1.h; then \
mv git_sha1.h.tmp git_sha1.h ;\
else \
rm git_sha1.h.tmp ;\
fi
BUILT_SOURCES = git_sha1.h