* Makefile.in: Add targets to automatically rebuild dependencies.

Remove targets which just listed dependencies of .o files.
	(DEP): New variable.
	(HFILES, GENERATED_HFILES): New variables.
	(CFILES, GENERATED_CFILES): New variables.
	(underscore.c): Don't do anything, just depend upon stamp-under.
	(stamp-under): New target; do what underscore.c used to do.
	(nlmconv.o): Depend upon sym.h and ecoff.h.
	(.dep, .dep1, dep.sed, dep, dep-in): New targets.
	(stage1, stage2, stage3, against, comparison): Remove.
	(de-stage1, de-stage2, de-stage3): Remove.
	(clean, distclean): Remove stamp-under and dep.sed.
	* dep-in.sed: New file.

	* Makefile.in (OBJDUMP_OBJS): New variable.
	($(OBJDUMP_PROG)): Use $(OBJDUMP_OBJS).

binutils/dep-in.sed

@@ -0,0 +1,15 @@
+:loop
+/\\$/N
+/\\$/b loop
+
+s!@INCDIR@!$(INCDIR)!g
+s!@SRCDIR@/!!g
+
+s/\\\n */ /g
+
+s/ *$//
+s/  */ /g
+/:$/d
+
+s/\(.\{50\}[^ ]*\) /\1 \\\
+  /g