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author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2014-12-02 09:01:21 +0000 |
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committer | <> | 2014-12-04 16:11:25 +0000 |
commit | bdab5265fcbf3f472545073a23f8999749a9f2b9 (patch) | |
tree | c6018dd03dea906f8f1fb5f105f05b71a7dc250a /depsver.mf | |
download | ntp-bdab5265fcbf3f472545073a23f8999749a9f2b9.tar.gz |
Imported from /home/lorry/working-area/delta_ntp/ntp-dev-4.2.7p482.tar.gz.ntp-dev-4.2.7p482
Diffstat (limited to 'depsver.mf')
-rw-r--r-- | depsver.mf | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/depsver.mf b/depsver.mf new file mode 100644 index 0000000..695f730 --- /dev/null +++ b/depsver.mf @@ -0,0 +1,60 @@ +$(DEPDIR)/deps-ver: $(top_srcdir)/deps-ver + @[ -f $@ ] || \ + cp $(top_srcdir)/deps-ver $@ + @[ -w $@ ] || \ + chmod ug+w $@ + @cmp $(top_srcdir)/deps-ver $@ > /dev/null || ( \ + $(MAKE) $(AM_MAKEFLAGS) clean && \ + echo -n "Prior $(subdir)/$(DEPDIR) version " && \ + cat $@ && \ + rm -rf $(DEPDIR) && \ + mkdir $(DEPDIR) && \ + case "$(top_builddir)" in \ + .) \ + ./config.status Makefile depfiles \ + ;; \ + *) \ + cd "$(top_builddir)" && \ + ./config.status $(subdir)/Makefile depfiles && \ + cd $(subdir) \ + ;; \ + esac && \ + echo -n "Cleaned $(subdir)/$(DEPDIR) version " && \ + cat $(top_srcdir)/deps-ver \ + ) + cp $(top_srcdir)/deps-ver $@ + +.deps-ver: $(top_srcdir)/deps-ver + @[ ! -d $(DEPDIR) ] || $(MAKE) $(AM_MAKEFLAGS) $(DEPDIR)/deps-ver + @touch $@ + +BUILT_SOURCES += .deps-ver +CLEANFILES += .deps-ver + +# +# depsver.mf included in Makefile.am for directories with .deps +# +# When building in the same directory with sources that change over +# time, such as when tracking using bk, the .deps files can become +# stale with respect to moved, deleted, or superceded headers. Most +# commonly, this would exhibit as make reporting a failure to make a +# header file which is no longer in the location given. To address +# this issue, we use a deps-ver file which is updated with each change +# that breaks old .deps files. A copy of deps-ver is made into +# $(DEPDIR) if not already present. If $(DEPDIR)/deps-ver is present +# with different contents than deps-ver, we make clean to ensure all +# .o files built before the incompatible change are rebuilt along with +# their updated .deps files, then remove $(DEPDIR) and recreate it as +# empty stubs. +# +# It is normal when configured with --disable-dependency-tracking for +# the DEPDIR to not have been created. For this reason, we use the +# intermediate target .deps-ver, which invokes make recursively if +# DEPDIR exists. +# +# If you modify depsver.mf, please make the changes to the master +# copy, the one in sntp is copied by the bootstrap script from it. +# +# This comment block follows rather than leads the related code so that +# it stays with it in the generated Makefile.in and Makefile. +# |