Fix bug in the driver that led to

	Fail: system error
	Action: getFileStatus

It was due to Simon M's recent addition of modification-time
checking.  You forgot to check whether the file M.o existed!

- Add in support for -recomp, which I forgot.
- force -fvia-C if the -C flag is specified on the cmd line

* The simplifier used to glom together all the top-level bindings into
  a single Rec every time it was invoked.  The reason for this is explained
  in SimplCore.lhs, but for at least one simple program it meant that the
  simplifier never got around to unravelling the recursive group into
  non-recursive pieces.  So I've put the glomming under explicit flag
  control with a -fglom-binds simplifier pass.   A side benefit is
  that because it happens less often, the (expensive) SCC algorithm
  runs less often.

- add -fno-warn-incomplete-patterns
- rename TMPDIR to DEFAULT_TMPDIR
- check TMPDIR environment variable (apprently missing before)
- add a bunch of anti-flags for profiling: -no-auto-all and friends.

Oops, #include reordering does not work if -#include refers to names
from Stg.h. Changes reverted. The original problem requires -optc-Dfoo
workaround.

Output -#include options before packages' C includes, to be able to
-#include a file that #defines e.g. _XOPEN_SOURCE and #includes a C
header depending on _XOPEN_SOURCE that is also included from Stg.h.
First inclusion of this header should be after the #define.

make this compile with pre-4.09 GHCs.

Use \{ \} in regex instead of { } for literal { }.
Hope it should be OK in theory; needed in practice here.

Replaced `catchIO justIoErrors' with `catchJust ioErrors'

wibble

Another attempt at getting the pipeline stuff right.  Fixed at least
one bug.

-split-objs is entirely reasonable in conjunction with -fasm

wibble

- Implement the mkdepend -X<dir> and --exclude-directory=<dir> options.
- some small cleanups

Assimilate mkdependHS into the driver, obsoleting the old Perl version.

The functionality is pretty much identical, except a few of the flags
accepted by the old version aren't implemented (--exclude-module,
--exclude-directory, --include-module).  If anyone needs these
options, please speak up.

fix for .hc files

Cleanup of the compilation pipeline.  Now the list of phases to run
for each filename is generated statically, rather than on-the-fly.

Things should be more robust; some nonsense combinations of flags and
input files are now thrown out.

giving the version number when asked for is NOT an error, therefore
output now goes to stdout (cf. Coding Standards)

Sigh, change the package definition again.  We weren't making a
distinction between libraries which need a suffix tag
(eg. libHSstd_p), and those that don't (eg. libHSstd_cbits).

The package spec now has two components for libraries, hs_libraries
(tagged) and extra_libraries (untagged).  The ordering of these
components is important: we specify that hs_libraries are linked
before extra_libraries.  This sounds problematic if you want to link
some plain C libraries before some Haskell libs, but in these cases it
should be possible to create separate packages for the two libs and
specify the dependencies explicitly.

Strictfp-like behaviour is the default now, which can be switched off
via -fexcess-precision. (Has anybody a better name for this option?)

Add dll as a fully-fledged way.

Gave driver access to bash for running system calls under Windows by writing
command out to a temp file, then sending that as the argument to "sh -". Sigh.
This is #ifdefed on mingw32_TARGET_OS; saner OSs just use system as normal.

Stop doing all system calls via "sh -c", as this messed up quoting.

fix finding of the usage message (again).

Fixed a bracket-o.

Windows fixes.

accept '-fvia-c' as an alternative capitalisation for '-fvia-C' (the
old driver used to do this, and it's documented in the Users' Guide)

* Fixed handling of filename arguments without extension
* Added new -fstrictfp flag
* Some cosmetic changes (unless/when instead of if)

Add -keep-tmp-files flag, to tell the driver not to delete tmp files.
Useful mainly for debugging the driver, and obsoletes the GHC
folklore of using ^Z for this purpose.

sparc NCG is now enabled by default for non-opt compilation.

Generalized the package file format a little bit: include directories,
include files, and options are now lists of Strings.

fix -keep-hc-file-too

no need to set hsc_lang = HscC when -split-objs is on.

bullet-proof the package code a bit more; check for write access to the
configuration file before doing anything, check whether we're adding a
package that's already there, etc.

Packages can now be added/removed from an installed GHC as follows:

    $ ./ghc-inplace --list-packages
    gmp, rts, std, lang, concurrent, data, net, posix, text, util,
    hssource, win32, com, std2
    $ ./ghc-inplace --add-package <newpkg
    Reading package info from stdin... done.
    Saving old package config file... done.
    Writing new package config file... done.
    $ ./ghc-inplace --list-packages
    gmp, rts, std, lang, concurrent, data, net, posix, text, util,
    hssource, win32, com, std2, mypkg
    $ ./ghc-inplace --delete-package mypkg
    Saving old package config file... done.
    Writing new package config file... done.
    $ ./ghc-inplace --list-packages
    gmp, rts, std, lang, concurrent, data, net, posix, text, util,
    hssource, win32, com, std2

This is a first stab at the kind of functionality we need for
installing Haskell libraries via RPMs: the RPM script would install
the libraries, and then do a "ghc --add-package" passing the
appropriate paths.  You'd then have "ghc -package" at your disposal to
use the newly installed package.  Similarly on de-install, the RPM
script would run "ghc --delete-package".

Also in this commit: prettify the package dumping.

Make -S work when going via the NCG.

fix phase ordering for NCG + -split-objs.

Hackily quote -#include options before passing them to mkdependHS

_Haskell1Version ==> cHaskell1Version

Fixed buglet in search for ghc-usage.txt