dependency tracking in bfd
bfd/:
* Makefile.am (AUTOMAKE_OPTIONS): Remove cygnus, instead use
no-dist and foreign.
(EXTRA_libbfd_la_SOURCES): New, list $(CFILES) to allow
dependency tracking to work for them.
(targets.lo, archures.lo, dwarf.lo): Rewrite to
use automake dependency tracking mechanism.
(MKDEP, DEP, DEP1, dep.sed, dep, dep-in, dep-am): Remove.
(mkdep section): Remove.
(BUILT_SOURCES): New, list $(BUILD_HFILES).
* Makefile.in: Regenerate.
* po/SRC-POTFILES.in, po/bfd.pot: Regenerate.
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