[coldfire-gnu-discuss] Usage of shared libraries

[Carlos O'Donell]

On Thu, Aug 30, 2007 at 03:02:31PM -0400, Jate Sujjavanich wrote:
> What I am trying to do now is create a "hello world" shared library.
> Using options as recommended on uCdot.org creates a library of size
> mshared-library-id * 16 MB. I am looking for the new recommended way of
> creating one for this toolchain.

The recommended way to create shared libraries for CodeSourcery's
Sourcery G++ toolchains is documented in the "Getting Started" guide.
More specifically Chpater 3, Section 2, "Shared Libraries" page 10.
 
> I am also having some issues with an application that is threaded using
> pthreads. It seems that the errno is not being passed from the kernel to
> the uClibc side of the system call. In my case, the mkfifo (mknod) does
> return a -1, but the errno on the application side is always a 0. I have
> a feeling this may be fixed in the latest uClibc. Does anyone know?

As far as I know this is not fixed in the latest uClibc. Please see
Chapter 3, Section 2.4, "Symbol Binding." uClibc doesn't follow normal
ELF symbol resolution and the threads errno cannot be updated. 

The simplest workaround is not to use shared libraries and pthreads.

Cheers,
Carlos.
-- 
Carlos O'Donell
CodeSourcery
carlos at codesourcery.com
(650) 331-3385 x716