* Makefile.in (INCLUDES): Remove -I$(srcdir)/config.
	* config.gcc (*-*-openbsd): Don't set tm_file.
	(alpha*-*-openbsd, arm*-*-coff*, arm*-wince-pe*,
	arm-*-pe*, avr-*-*, h8300-*-rtems*, h8300-*-elf*,
	h8300-*-*, hppa*-*-osf*, hppa*-*-bsd*, hppa*-*-hpux*,
	i370-*-opened*, i370-*-mvs*, i370-*-linux*, i?86-*-openbsd*,
	i?86-*-lynxos, i?86-*-nto-qnx*, iq2000*-*-elf*, m68000-hp-hpux*,
	m68k-hp-hpux*, m68k-*-aout*, m68k-*-coff*, m68020-*-elf*,
	m68k-*-elf*, m68k*-*-netbsd*, m68k*-*-openbsd*, m68k-*-sysv4*,
	m68k-*-linux*, m68k-*-rtems*, mcore-*-pe*, mips*-*-netbsd*,
	mips*-*-openbsd*, rs6000-*-lynxos*, sh*-*-elf*, sh*-*-ka,
	sh-*-rtemself, sparc-*-openbsd*, strongarm-*-pe, vax-*-openbsd*,
	xscale-*-coff): Use explicit and complete lists of target headers
	to include.  Move definitions to tm_defines where appropriate.
	(hppa*-*-openbsd*, powerpc-*-openbsd*): Comment out stanza for
	not-yet-contributed configuration.

	* config/lynx.h, config/alpha/openbsd.h, config/arm/coff.h
	* config/avr/avr.h, config/frv/frv.h, config/h8300/elf.h
	* config/i370/linux.h, config/i370/mvs.h, config/i370/oe.h
	* config/i386/nto.h, config/iq2000/iq2000.h,
	* config/m68k/coff.h, config/m68k/hp310.h, config/m68k/hp320.h
	* config/m68k/linux.h, config/m68k/m68k-aout.h
	* config/m68k/m68k-none.h, config/m68k/m68kv4.h
	* config/m68k/netbsd.h, config/m68k/openbsd.h
	* config/m68k/sgs.h, config/mcore/mcore-pe.h,
	* config/mips/netbsd.h, config/mips/openbsd.h, config/pa/pa.h,
	* config/rs6000/lynx.h, config/sh/embed-elf.h, config/sparc/openbsd.h:
	Remove includes of other target config headers, and
	definitions of macros moved to tm_defines lists.  Add #undefs
	where now necessary to prevent redefinition warnings.

	* config/h8300/coff.h: New file split out of...
	* config/h8300/elf.h: ...here.
	* config/m68k/hp320base.h: New file split out of...
	* config/m68k/hp320.h: ...here.
	* config/rs6000/lynxbase.h: New file split out of...
	* config/rs6000/lynx.h: ...here.

	* config/m68k/hp310g.h, config/m68k/hp320g.h, config/m68k/hpux7.h
	* config/m68k/m68k-coff.h, config/mips/openbsd-be.h: Delete file.

	* config/sol2.h: Remove #if 0-ed #include of sys/mman.h.
	* config/m68k/m68kelf.h: Remove commented out #include of m68k/sgs.h.
	* config/mcore/mcore.h: Don't include hwint.h nor machmode.h.
	Remove unnecessary #ifndef.
	* config/s390/s390.h: Prefix #include of s390/fixdfdi.h
	[under IN_LIBGCC2] with config/.

From-SVN: r70651