sparc/sunos:
 	under SunOs <= 4.1.2 even if the processor is a supersparc, the gc
	option -msupersparc cannot 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


Cygwin:
	timmings user_time is always 0 and user time = real time
	buffering (after setvbuf each read returns EOF)
	sockets (AF_UNIX not supported)
	stack overflow detection does not work

ppc/linux:
	with no optimization options for gcc do not use global registers
	(use: ./configure --with-c-flags=debug --disable-regs)
