mingw32 support

Patched my previous patch ($ vs $$, && vs if/then/fi). Installing a
Happy binary-dist still only creates a happy and no happy-1.6
executable, but this has very probably nothing to do with my changes.

Two checks for empty file lists added.

No more RAWCPP, thank you.

When installing, append  to entries in PACKAGE_BINS list

Install the docs in $real_datadir, not $datadir.

Updates on the Win32 front

oops, forgot to update bin dist configure for FreeBSD 2.0/3.0 split.

Updated to track aclocal.m4 changes

install-bin:
   * if any of $(VERSION_SYMLINKS_FOR) already exists as a symlink,
     replace it with a new one.

Clarified various cygwin32 install gotchas

- mk-version-symlinks not needed any more: the links are installed by
  the relevant Makefiles.

- install the link from $(package) to $(package-version) in the
  installation directory.

Perform UNC->DOS translation on what bash-cygwin32's pwd returns.

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

Updated cygwin32 details

Added TMPDIR to list of variables prepended to perl & sh scripts.

AC_SUBST(exeext) added (only non-empty under cygwin32)

add note about 'make install-doc' to the message printed after
configuration.

fix script installation *again*.

Finally fix the 'for i in ; do ...' problem.

Some shells have problems with 'for i in ; do ...', so protect the
relevant for loops with 'if test <string>; then ...'.

Replace three 'test ... && ...' sequences with 'if ... then ... fi',
since the test form would fail, causing some non-GNU makes to bomb
out (maybe they invoke sh with -e?).

use PACKAGE_BINS to get the actual binaries to install.

make this Makefile package-independant.

update to version 2.08

protect $$s for bash.

Test for CC and GCC before finding CPP, since GNUCPP depends on
finding GCC to do the right thing.

prepend SED and RAWCPP to all scripts, not just PACKAGE_LIB_SCRIPTS.

do the symlink thing when installing, not in the local tree.

Link ghc to ghc-$(version), not the other way around.  This means that
old versions won't be spammed when a new one is installed.

To go in 3.00

fix dangling backquote in last commit.

Added feature tests for sed and cpp

Upped version number; added SED and RAWCPP for lib_scripts

perl not being added to scripts' top line

update version number, and add stuff to install happy.

changing version number to 2.07

version ==> 2.07
PACKAGE_LIBSCRIPTS ==> PACKAGE_LIB_SCRIPTS

remove unused/duplicated files

Prepend she-bangs to scripts rather than eval exec magic

IX/RS6000 patches