enable/disable threads when installing gcc

enable/disable threads when installing gcc

[Long Li]

Hi, Guys,

I have just installed GCC 3.0 on my redhat 7.2 Linux
machine. During the configuration of GCC, I found the
option --enable-threads was turned off, which means, I
guess, the GCC 3.0 on my machine does not support
thread. However, when I include the pthread.h file and
use the GCC 3.0 to compile, it worked and the result
showed me some threads switching cases. So what does
the --enable-threads option do? Does it really turn
off the thread or just a default case, and you can
overwrite it when compling?


Thanks a lot!


Long

__________________________________________________
Do You Yahoo!?
Yahoo! Tax Center - online filing with TurboTax
http://taxes.yahoo.com/

RE: enable/disable threads when installing gcc

[Rupert Wood]

Long Li wrote:

> So what does the --enable-threads option do?

It specifies which threading model should be used by the threading
abstraction in <bits/gthr.h>. This is used by the C++ and objective C
runtime libraries, the STL implementation and the libgcc exception
handling mechanism. Hence you may run into thread safety problems if you
use threads in C++ or Objective C.

I'm not sure if <bits/gthr.h> is intended for general use - I don't
think it's documented in the manual.

Rup.