1 files changed, 51 insertions, 0 deletions
diff --git a/config/depend1.in b/config/depend1.in
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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+## `makedepend' program is that only those files that are out of date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: $(srcdir)/Dependencies
+$(srcdir)/Dependencies: .depend
+	-@echo '## This file is machine generated on GNU systems.' >$@
+	-@echo '## Only temporary changes may be made here.' >>@
+	-@echo >>@
+	-srcdir=$(srcdir) perl -p $(top_srcdir)/bin/distdep .depend >>$@
+
+.PRECIOUS: .depend
+.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 2>/dev/null |		      \
+	          sed 's/\.o/.lo/' >>$@;	      			      \
+	   fi;								      \
+	done;
+	-@echo '## This file is machine generated on GNU systems.' \
+		>$(srcdir)/Dependencies
+	-@echo '## Only temporary changes may be made here.' \
+		>>$(srcdir)/Dependencies
+	-@echo >>$(srcdir)/Dependencies
+	-perl -p $(top_srcdir)/bin/distdep .depend >>$(srcdir)/Dependencies
+
+-include .depend
+