This lets the threaded RTS use SIGVTALRM rather than SIGALRM for its
interval timer signal, so the threaded and non-threaded RTS are
compatible.  It unfortunately doesn't completely fix #850/#1156, for
that we really have to use a restartable sleep instead of usleep().

Also I cleaned up the timer API a little: instead of returning an
error value that ultimately gets ignored, we now report errors from
system calls and exit.

Previously one had to edit configure.ac to build a release version. This is
evil, so one can now specify this on the configure invocation line like:

   RELEASE=YES ./configure

Note that non-released versions are still the default.

For non-release builds, we want to append a date to the version number
(e.g. 6.7.20070206).  Previously this was done by the nightly build
script, this new method figures out the snapshot version by querying
the darcs repository and finding the date of the most recent patch
(actually it finds the most recent of the last 100 patches, but that
should be good enough).  This is done by the configure script.

To handle source distributions, we create a file VERSION in the
top-level directory that contains the version number, and ship this in
the source distribution.  The configure script picks up the version
from this file if it doesn't see a _darcs directory.

Fixes trac #952: Haskell requires consistent overflow behaviour, which
gcc doesn't give without this flag.

Basic -fvia-C code generation is there, not much testing.

Apparently, the original fix never really worked due to typos and oversights.

Add GhcRtsWithPapi=YES to mk/build.mk to turn it on

Fri Jul 28 06:49:35 EDT 2006  simonpj@microsoft.com

See: http://www.gnu.org/software/autoconf/manual/html_node/Obsolete-Macros.html

On recent GNU ELF systems one can mark an object file as not
requiring an executable stack. If all objects- linked into a
program have this note then the program will not use an executable
stack, which is good for security (and some distros have it as a
QA policy). GHC generated code does not need an executable stack
so add the note to the assembly output of the native code
generator (conditional on a configure test).

Consistently used spaces rather than tabs.
Removed trailing whitespace.
Wrapped comments to fit in a standard terminal.

Happy, Alex and Haddock are built separately using Cabal now.

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

check for ctime_r

Check for librt and clock_gettime()

move RTLD_* tests down to unix package

Check for RTLD_DEFAULT in dlfcn.h and use it if it is available.
(On Mac OS X its value is -2, and using NULL instead does not work.)

MERGE TO STABLE

Mac OS X/PowerPC: Make GHCi deal with the additional statically linked
symbols from libSystemStub.a on Tiger (printf$LDBLStub and friends).

MERGE TO STABLE

Following Apple's announcement to switch to Intel processors,
add i[3456]86-apple-darwin platform.

MERGE TO STABLE

GNU/Hurd platform (from Thomas Schwinge
<schwinge-list-ghc-users@nic-nac-project.de>)

Mac OS X:
Kill HaskellSupport.framework.
Instead, look for GMP.framework (a framework-version of libgmp), else look
for a normal -lgmp as usual.
The other part of HaskellSupport.framework, dlcompat, is no longer needed
(as of Mac OS X 10.3, it's included in libSystem).
It's enough to just use the normal configure tests for -ldl.

MERGE TO STABLE

Temper 'libm' testing -- if 'atan' is available straight from libc,
no need to include libm.

Merge to STABLE

Look for the docbook-xsl directory in /sw/share/xml/xsl/docbook-xsl,
because that's where the Fink distribution for Mac OS X puts it.

MERGE TO STABLE

aclocal.m4:FP_PROG_SORT: locate unix-like sort utility; on success, substituted as SortCmd.
-configure.ac: use FP_PROG_SORT
-mk/config.mk.in: added SORT setting..only used by libraries/Makefile

Merge to STABLE

Sanity check for $hardtop containing space characters, suggested by
Malcolm Wallace.