1$(DEPDIR)/deps-ver: $(top_srcdir)/deps-ver 2 @[ -f $@ ] || \ 3 cp $(top_srcdir)/deps-ver $@ 4 @[ -w $@ ] || \ 5 chmod u+w $@ 6 @cmp $(top_srcdir)/deps-ver $@ > /dev/null || ( \ 7 $(MAKE) $(AM_MAKEFLAGS) clean && \ 8 echo -n "Prior $(subdir)/$(DEPDIR) version " && \ 9 cat $@ && \ 10 rm -rf $(DEPDIR) && \ 11 mkdir $(DEPDIR) && \ 12 case "$(top_builddir)" in \ 13 .) \ 14 ./config.status Makefile depfiles \ 15 ;; \ 16 *) \ 17 cd "$(top_builddir)" && \ 18 ./config.status $(subdir)/Makefile depfiles && \ 19 cd $(subdir) \ 20 ;; \ 21 esac && \ 22 echo -n "Cleaned $(subdir)/$(DEPDIR) version " && \ 23 cat $(top_srcdir)/deps-ver \ 24 ) 25 $(AM_V_at)cp $(top_srcdir)/deps-ver $@ 26 27.deps-ver: $(top_srcdir)/deps-ver 28 @[ ! -d $(DEPDIR) ] || $(MAKE) $(AM_MAKEFLAGS) $(DEPDIR)/deps-ver 29 @touch $@ 30 31BUILT_SOURCES += .deps-ver 32CLEANFILES += .deps-ver 33DISTCLEANFILES += $(DEPDIR)/deps-ver 34 35# 36# depsver.mf included in Makefile.am for directories with .deps 37# 38# When building in the same directory with sources that change over 39# time, such as when tracking using bk, the .deps files can become 40# stale with respect to moved, deleted, or superceded headers. Most 41# commonly, this would exhibit as make reporting a failure to make a 42# header file which is no longer in the location given. To address 43# this issue, we use a deps-ver file which is updated with each change 44# that breaks old .deps files. A copy of deps-ver is made into 45# $(DEPDIR) if not already present. If $(DEPDIR)/deps-ver is present 46# with different contents than deps-ver, we make clean to ensure all 47# .o files built before the incompatible change are rebuilt along with 48# their updated .deps files, then remove $(DEPDIR) and recreate it as 49# empty stubs. 50# 51# It is normal when configured with --disable-dependency-tracking for 52# the DEPDIR to not have been created. For this reason, we use the 53# intermediate target .deps-ver, which invokes make recursively if 54# DEPDIR exists. 55# 56# If you modify depsver.mf, please make the changes to the master 57# copy, the one in sntp is copied by the bootstrap script from it. 58# 59# This comment block follows rather than leads the related rules so that 60# it stays with it in the generated Makefile.in and Makefile. 61# 62