Link with math library (-lm) on IRIX so that to get support for long double
arithmetic. Also make sure to only use -IPA with MIPSPro Compilers.

don't grab in -mdynamic-no-pic with icc, note that you need icc >= 9.0.25
to have a working build

- Check for <stdint.h> ourselves if AC_HEADER_STDC didn't do that
- Build with -mdynamic-no-pic on MacOS X, this brings up to 20% performance
  improvement in the CPU core.

Add system-specific implementations of idle_{wait,resume} functions.

Check for CoreFoundation framework (Darwin 8.0.1). Likewise for
IOKit/storage/IOBlockStorageDevice.h which is not available there on x86

Fix and factor out ether_exit(). Pitifully, MacOS X 10.2 does not make select()
a cancellation point when it is passed a NULL timeout. Workarounded in
receive_func() with a full inline of poll_fd() + pthread_testcancel().

ethernet/slirp works on netbsd too

Use a custom poll_fd() function implemented as select() on platforms that
don't support poll() natively, e.g. MacOS X and some older BSDs.

fix CFLAGS preservation

Use Windows clipboard code with SDL graphics only. X11 output will use
the X server glue anyway

Check for egrep early, as AC_EGREP_CPP wouldn't work correctly otherwise
(e.g. GCC version not detected, likewise for ANSI C headers). Add check
for Windows exceptions support. Some cosmetics for Cygwin.

Enable 33-bit memory addressing on 64-bit JIT capable platforms (e.g. x86-64).
This is useful to get rid of address offset sign extensions. It uses POSIX
shared memory to create aliased regions, fallback to usual sign-extension
way if shm_open et al. don't work (e.g. no /dev/shm mounted)

enable JIT on x86_64

Add configure macros to check for -framework Carbon & -framework IOKit so
that we choose to include ../MacOSX/clip_macosx.cpp, sys_darwin.cpp or not.

Check for the "true" command better with AC_PATH_PROG. aka fix BLESS
command checking on MacOS X.

Initial SDL/video support. Fix VOSF code could lead to a crash on run-time
resolution/depth switching. Rearrange blitter lookup code, aka make it cleaner.

fix loff_t & caddr_t type checks

Really make sure VERSION & PACKAGE macros are defined when generating a
configure script with autoconf 2.52.

Check for readline headers in the headers check section as otherwise, and
I don't exactly know why, AC_HEADER_STDC would fail with newer autoconf
versions.

AM_GNU_GETTEXT for gnome stuff

modernized the autoconf stuff

Add changes from Brian Johnson:
- Update MIPSpro compiler flags
- Only define static variables if they are to be used
- Try to lock the pthreads mutex prior to unlocking/destroying it

Get rid of CPU_* defines as nobody actually used them and are useless

Huh, am I still asleep? Actually use the cpuemuX_nf.cpp pattern rather
than the *.s variant.

Ensure the IEEE fpu core is used when building the JIT compiler

Define SAHF_SETO_PROFITABLE on x86, aka restore full performance of the
JIT compiler. ;-) BTW, also fixes some valgrind warnings.

Check for for C99 math functions in the form *l()

Portability fixes: use a switch to test for ac_cv_c_float_format