diff options
Diffstat (limited to 'Makefile.am')
| -rw-r--r-- | Makefile.am | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/Makefile.am b/Makefile.am index a6b016dc2..5303dae93 100644 --- a/Makefile.am +++ b/Makefile.am @@ -922,8 +922,17 @@ SUFFIXES += .man # Version files - see script 'build-aux/git-gen-version' EXTRA_DIST += $(top_srcdir)/.version BUILT_SOURCES += $(top_srcdir)/.version -$(top_srcdir)/.version: - echo $(VERSION) > $@-t && mv $@-t $@ +# Regenerate a temporary version string file on every build, but update +# the real version file's mtime only if its contents change. +.PHONY: .version.tree +.version.tree: + @test -f $(distdir)/.tarball-verion || echo $(VERSION) > $@ +$(top_srcdir)/.version: .version.tree + @if ! test -f $(distdir)/.tarball-version; then \ + test -f $@ || cp .version.tree $@; \ + cmp -s .version.tree $@ || cp .version.tree $@; \ + fi +MOSTLYCLEANFILES += .version.tree dist-hook: echo $(VERSION) > $(distdir)/.tarball-version |