Improved rules for stubs. Not perfect yet, but better than before.

wibble

- Don't rm the .o file when splitting.   Doing so
  forces grotesque amounts of recompilation

- actually add -split-objs to SRC_HC_OPTS if $(SplitObjs) == YES and
  we're building a library.

- collect together all the $(SplitObjs) stuff in one place under
  the library building code (it's only relevant for libraries).

SplitObjs=YES should now work.

Move the HC_PRE & HC_POST stuff into target.mk, so we can override
SplitObjs in the Makefile properly.

Add $(INSTALL_INCLUDES), we'll probably need it at some point.

Make splitting object files the default again on non-Windoze platforms

Fixed -split-objs and removed last vestiges of dLL_ifs.hi.

find changed to FIND, that Windows users may
ignore DOS find when PATH has gone astray.

Added FIND as a symbol so that it can be changed on OSes which have
different ideas as to what "find" should do.

Replaced $(HC_OPTS) in mkdependhs rule whence I had inadvertently removed
it along with the odir filter in which it sat.

Added SplitObjs for when -split-objs is being used. Removed -split-objs and
-odir from GhcLibHcOpts. -odir shouldn't be needed any more in any case.

Changed order of recursive makes so that recursive make happens before make
in the current directory. This helps when building hslibs as DLLs, where
the cbits DLLs need to be made before the main DLLs.

Removed redundant rules (%.dvi : %.tex &c.) that were breaking DocBook
(re)building.

Sven's first autoheader commandment: Don't change config.h.in manually...!
(Why is mk/config.h.in in the repository? configure is not, either.)

Added more SIZEOF/ALIGNMENT tests

Added autoconf magic for size/alignment of some more C types

Set SRC_SGML2XXX_OPTS variables rather than SGML2XXX_OPTS

Added SGMLSTYLESHEET variable and set SGML2XXX_OPTS to -d $(SGMLSTYLESHEET)

Add $(SGML_DOC).tex to $(CLEAN_FILES).

Changed rules to make SGML documentation using DocBook tools rather than
LinuxDoc.

Set MKDEPENDHS to $(HC) instead of $(GHC).
This means that dependencies will be computed with the same
compiler as compilations, which is presumably the right thing.

Add comment about TMPDIR.

remove old unused $RTS_PREFIX I just noticed.

eliminate recursive defn: HC <--> WithGhcHc

cleanups & fixes

Obtained-from: Michael Weber <michael.weber@post.rwth-aachen.de>

New make variable: $(WithNofibHc) which defines the Haskell compiler
used to build nofib.

Define $(GHC_INPLACE) in fptools/mk/config.mk.in.  $(WithNofibHc) is
set to $(GHC_INPLACE) by default.

Fix $(MKDEPENDHS) in ghc/lib/std/Makefile.

Automatically detect installed copies of ghc, nhc and hbc and plug
them into the Makefile variables $(GHC), $(NHC) and $(HBC)
respectively.  $(HC) is now supposed to be a generic installed haskell
compiler, which defaults to $(GHC) and can be changed via ./configure
--with-hc=<blah>.

Reorganise and tidy up a few things in config.mk.in.

80-columnify

Make <readline/history.h> a requirement for use of libreadline.

Add hslibs to the default $(ProjectsTo{Install,Build})

Nuke DEBUG_EXTRA once and for all, and make Hugs use the same stack
tags as GHC.

Add checks for readline library (as opposed to headers).

Add a test for libreadline.{a|so}  (include/readline/readline.h
is already tested for.).

Add way 's', for SMP/PThreads

set $(HC) to the inplace ghc driver script.

install (INSTALL_PROGS): a ; too many

Improved on the install rules for libexecs and bins a little
(at least from a Win32 pov - you can now install "happy.bin"
without trouble.)

Support for generating a VERSIONINFO resource that can be pinned
onto generated DLLs and EXEs (Win32 specific.)

Always prepend `#! $(INTERP)' to a script, even if we're BIN_DISTing.
It doesn't do any harm, and means that we can execute the BIN_DIST
version of a script from the build tree, provided it doesn't depend on
any global paths.

Build System Cleanup
--------------------

This commit is intended to clear the way for automatic RPM building.
In particular, the idea is that 'make install' doesn't build anything,
so you can do

	make install prefix=/some/tmp/prefix

to install everything in /some/tmp/prefix, but leave the hardwired-in
install directories the same.

For scripts that depend on the install dir (currently just the GHC
driver and mkdependHS), we now build two versions: <script>-inplace,
which is used for running the script from the build tree, and
<script>, which is the to-be-installed version.

NOTE: binary distributions are now a little bit trickier to build.
You *must* include the line "BIN_DIST=1" in your build.mk if you
intend to make a binary distribution from the current build tree.
This is because certain scripts have to be built differently, and we
don't rebuild them when doing 'make binary-dist' anymore (since 'make
binary-dist' just does a 'make install' with a re-targetted prefix,
just like the RPM builder).

Other changes

	- the binary-dist machinery is now all in fptools/Makefile
	- removed a gratuitous $(package)-$(version) level of
	  directories from the binary distribution.
	- binary distributions are now placed under the package
	  name, rather than fptools/fptools.
	- various other minor cleanups.