[Simh] What library is "-lrt" in makefile for?

[Pierre-Francois BESSON]

Hello,

I was able to build SIMH on 10.4.9 by changing the 
following lines in
the make file :

CC = gcc -std=c99 -O2 -U__STRICT_ANSI__ -g -lm 
-lrt $(OS_CCDEFS) -I .
ifeq ($(USE_NETWORK),)
else
NETWORK_OPT = -DUSE_NETWORK -isystem 
/usr/local/include /usr/local/lib/libpcap.a
endif

to

CC = gcc -std=c99 -O3 -U__STRICT_ANSI__ -g -lm 
$(OS_CCDEFS) -I .
ifeq ($(USE_NETWORK),)
else
NETWORK_OPT = -DUSE_NETWORK -isystem /usr/include
../libpcap-0.9.5/macos/libpcap.a
endif
(I used the libpcap library) and everything works 
fine, even the
ethernet option.

Hope this helps.

Pierre Francois Besson