* Makefile.in (CFILES): Add pex-*.c.
	(REQUIRED_OFILES): Change pexecute.o to @pexecute@
	(CONFIGURED_OFILES): Add pex-*.o.
	(TEXIFILES): Add pexecute.txh.
	(pexecute.o): Delete rule.
	(pex-cygwin.o, pex-djgpp.o, pex-mpw.o, pex-msdos.o, pex-os2.o,
	pex-unix.o, pex-win32.o): New rules.
	* configure.in: Change AC_INIT argument to xmalloc.c.
	Compute appropriate pexecute implementation and substitute it
	as @pexecute@.

	* pexecute.c: Split up into...
	* pex-cygwin.c, pex-djgpp.c, pex-mpw.c, pex-msdos.c, pex-os2.c,
	pex-unix.c, pex-win32.c, pex-common.h, pexecute.txh: ... these
	new files.

	* functions.texi: Regenerate.
	* configure: Regenerate.

From-SVN: r61728