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##                                                             -*- makefile -*-

## We keep a list of dependencies in `.depend' for each of the source
## files on which it depends.  When one of the source files is modified
## we remove its record from .depend and regenerate its dependencies,
## tacking them onto the end of .depend.  By including the .depend file
## into the makefile, we're telling make that the makefile depends on
## the dependency list in the .depend file.
##
## This is as fast as the `.d' method described in the GNU make manual
## for automatic dependencies, but has the added advantage that all
## dependencies are stored in one place.  The advantage over the
## `makedepend' program is that only those files that are out of date
## have dependency information rebuilt, and the Makefile is not
## modified.
##
## This is also where tracing information is updated.  The $(TRACE)
## program is run on each source file to make sure that the H5TRACE()
## macros are up to date.  If they are then the file is not modified,
## otherwise the file is changed and a backup is saved by appending a
## tilde to the file name.
##
.PRECIOUS: .depend .distdep
dep depend: .distdep

.distdep: .depend
	touch .distdep
	-srcdir=$(srcdir) perl -p $(top_srcdir)/bin/distdep .depend >.distdep

.depend: $(LIB_SRC) $(TEST_SRC) $(PROG_SRC)
	@touch .depend
	@for dep in $? dummy; do					      \
	   if [ $$dep != "dummy" ]; then				      \
	      echo Building dependencies for $$dep;			      \
	      obj=`echo $$dep | sed 's/\.c/\\\\.lo/'`;			      \
	      sed '\%$$obj%,\%[^\\]$$%d' <$@ >$@- && mv $@- $@;		      \
	      $(TRACE) $$dep;						      \
	      $(CC) -M -MG $(CPPFLAGS) $$dep |sed 's/\.o/.lo/' >>$@;	      \
	   fi;								      \
	done;
	-perl -p $(top_srcdir)/bin/distdep .depend >$(srcdir)/.distdep

-include .depend