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sparc/sunos:
under SunOs <= 4.1.2 even if the processor is a supersparc, the gcc
option -msupersparc cannot be used in CFLAGS_MACHINE. The configure
script omits it.
Thus integer multiplication and division is very slow...
sparc/solaris:
you should be able to access as/ld/ar/ranlib maybe you should
add /usr/ucb:/usr/ccs/bin/ ar something similar to your PATH variable
ix86/win32 with Cygwin:
timmings system_time is always 0 and user time = real time
buffering not implemented (after setvbuf each read returns EOF)
Linedit does not work if CYGWIN=TTY is defined.
ix86/win32 with VC++ 6.0 and MinGW (I suppose):
sockets not implemented
shell/2 and system/2 do not return correct error code
(due to command.com bad interpreted)
popen/3 does not work (due to command.com)
exec/5 does not work (due to command.com)
send_signal/2 (does not work apparently)
select/5 only implemented with sockets (to be tested more deeply)
ix86/win32 with MinGW
cannot be compiled with -fomit-frame-pointer (gcc 3.3.1 and 3.3.3)
more precisely fails if engine.c compiled with -O2 -fomit-frame-pointer
(and only these 3 functions Execute_Directive Call_Prolog Call_Next
suffice to fail with -O2 -fomit-frame-pointer)
ppc/linux:
with no optimization options for gcc do not use global registers
(use: ./configure --with-c-flags=debug --disable-regs)
ix86/FreeBSD (OpenBSD ?):
linedit is not yet supported, use ./configure --disable-linedit
check before (this is maybe no longer true)
ix86/sco:
On SCO UnixWare use --host=i586-pc-sco when using ./configure
(until autoconf is updated to recognize UnixWare).
MacOS:
if a Fatal Error: Segmentation Violation occurs it can be due to a C
stack overflow. It is possible to change the size of the C stack
before starting GNU Prolog. For instance the following command set the
C stack size to 8Mb:
ulimit -s 8192 (with bash)
limit stacksize 8M (with csh)
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