Added --enable-hc-boot flag for setting up a .hc build tree

- check for an installed libgmp 2.0.x

- check endianness of host (this test for some reason
  generates a warning from autoconf, but it seems harmless)

- move SIZEOF checks together (previous commit added SIZEOF checks to
   a different part of the file).

 - check alignment of longs:  unsigned ints are no good, because we need to
   check whether f.e. a float can be put on the stack, which is
   StgWord aligned, and currently an StgWord is basically a long.

Added alignment tests

Add some size tests.

back out last commit until we've decided how to do these properly.

Added more feature tests

don't look for green-card binary, use the one in the
build tree instead.

Do UNC->DOS translation of TOP_PWD

alpha-dec-osf1 and alpha-dec-osf3 are now separate configurations.

AC_SUBST(exeext)

bogus '/' crept in.

add yet more hacks for tmp_mnt, this time to deal with amd-style mount
points.

minor mod to the happy configuration.

If the installed version of Happy is < 1.3, use the one from the tree.

Moved feature tests from configure.in to aclocal.m4 and macroified them

Cleaned up; moved custom-checks to aclocal.m4; fixed lead_uscore problem on alphas

Added test for greencard

removed HostPlatformFull; added HostOS_Full(==host_os)

2.04 updates

AIX

Made perl library test non-fatal

Look for readline.h

Major update to more-or-less 2.02

don't look for mk/platform.mk, use mk/platform.mk.in.

New Build System!

Bulk of final changes for 2.01

partain changes through 960629

partain 1.3 changes to 960626

WDP 0.27 tidying up

Initial revision