From af2637aa32aac1ef512433407385e8e2bf711aea Mon Sep 17 00:00:00 2001 From: Emil Velikov Date: Tue, 31 May 2016 14:46:19 +0100 Subject: [PATCH] automake: bring back the .PHONY git_sha1.h.tmp rule With earlier commit 3689ef32afd ("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 Tested-by: Grazvydas Ignotas Signed-off-by: Emil Velikov --- src/Makefile.am | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/src/Makefile.am b/src/Makefile.am index f5c07739dea..45590c0a07a 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -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 -- 2.30.2