Fixed caching bug in FPTOOLS_END_{TEXT,DATA}_SECTION.

Move 4.01 onto the main trunk.

Merge from HEAD

Re-install hack which fixes 'leading underscore' feature test under cygwin32

Distinguish between defn and use of etext and end syms; they're not
the same on platforms where we have to resort to asm labels.

Added tests required by Hugs

fix a couple of bugs in the text/data segment end symbol tests.

Add support for FreeBSD 3.0 (ELFish).
Rename i386-unknown-freebsd to i386-unknown-freebsd2, and add
i386-unknown-freebsd3.

NOTE: this won't bootstrap an ELF GHC using an a.out GHC, some laying
on of hands is required for that.

Added feature tests for etext and end plus text vs. data section placement in executable

O_BINARY test: protect fcntl.h include

Add feature test for O_BINARY

remove old test for GLIBC.

Fix leading underscore test.

Added long long feature test; macro namespace cleanup

define LEADING_UNDERSCORE in config.h.

GHC_CHECK_ALIGNMENT changed to check natural alignment restrictions

Added alignment tests

Added more feature tests

New attempt at converting backslashes into forward ones.

revert to version 1.9 of AC_PROG_GNUCPP.

revert 'tr' breakage for the time being.

delete a spurious space.

Further RAWCPP tweakage

Changed translation of backward slashes to forward ones (now in perl.)

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

AC_PROG_GNUCPP: look for (\/|\\)cpp, not (\/|\\\\)cpp

AC_PROG_GNUCPP: translate backward slashes into forward ones.
AC_HAVE_GCC: tweaked sed regexp to catch cygnus gcc snapshot
version strings (i.e., version cygnus-2.7.2...)

reinforce the test for Happy: version 1.4 or later is now *required*

make the RAWCPP test a little more sensible.

remove bogus [ ] in macro for leading underscore test.

Fix the sed string for the gcc check, it was referring to sub-regexps
that didn't exist.

Drop egcs support for gcc test

use * instead of ?, since some seds don't recognise ?, and some also
don't recognise the alternative \{0,1\}. sigh.

remove spurious comma.

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

fptools specific autoconf macros