* configure.host: New file.
* configure.tgt: New file.
* aclocal.m4: New file.
* configure: New file, built by autoconf.
* acconfig.h: New file.
* config.h.in: New file, built by autoheader.
* sysdep.h: New file.
* ld.h: Incorporate old contents of config.h.
* config.h: Remove.
* Makefile.in: Various changes for new configure script. Also:
(CC_FOR_BUILD): Remove.
(ldmain.o): Don't bother to ensure that EMUL is non-empty.
(dep.sed): Use @SRCDIR@, not @srcdir@.
* dep-in.sed: Use @SRCDIR@, not @srcdir@.
* genscripts.sh: Create ldscripts if it does not exist.
* ldemul.c, lexsup.c, mpw-emipsidt.c: Don't include "config.h".
* mpw-esh.c, emultemp/*.em: Likewise.
* ldmain.c: Likewise. Include <ctype.h>. Don't try to set
HAVE_SBRK here.
* config/*.mt, config/*.mh: Remove.
(i386-unknown-coff): Remove.
(sh-hitachi-hms): New target.
(emulation_ofiles): Set correctly for each target.
(version, TDEFINES): Add to makefile fragment.
* mpw-make.in (BISON): Use byacc instead of bison.
(em_*.c): Replace with e*.c everywhere.
(ldgram.h): Separate action from ldgram.c generation.
(LD_PROG): Depend on Version.r.
(Version.r): generate from version info.
* mpw-em.c: Remove.
* mpw-emipsidt.c: New file, modified for MPW from emipsidt.c.
