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Re: -pthread option

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: ali hagigat <hagigatali at gmail dot com>
Cc: gcc-help at gcc dot gnu dot org
Date: Sun, 16 Jan 2011 13:34:03 +0000
Subject: Re: -pthread option
References: <AANLkTikJ-nXUOyXNauNukZFE1sK2vSH3Mk_W_o+Ktbaq@mail.gmail.com>

On 16 January 2011 08:50, ali hagigat wrote:
> Add support for multithreading using the POSIX threads library. ?This
> option sets flags for both the preprocessor and linker. ?It does not
> affect the thread safety of object code produced by the compiler or
> that of libraries supplied with it.
> --------------------------------------------------------------
> What is the meaning of thread safety? I wonder if anybody knows what
> flags are set and please write a simple example of a multi-thread
> code.

The flags are platform-specific.  For GNU/Linux it passes -D_REENTRANT
 to the preprocessor and -lpthread to the linker.

This list really isn't the place to learn what thread-safety means, or
to learn about multithreading in general.  There are lots of books and
online documentation covering it.

References:
- -pthread option
  - From: ali hagigat

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