diff options
Diffstat (limited to 'src/Makefile.am')
| -rw-r--r-- | src/Makefile.am | 19 |
1 files 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 |