On Wed, 2004-09-22 at 22:00, Sergey M. Samoylov wrote:
> I have a code with mistake:
>
> extern int errno;
> main()
> {
> printf("errno=%d",errno);
> }
> Why in any cross gcc compilers when it compiler, compiler will pass?
> Why compiler will not say me about any mistakes like:
> : undefined reference to 'errno'
>
> It's just only in cross compiler in usuall compiler gcc-3.3.1 it's OK and
> compiler generate the error.
There is no actual error here. you are defining an external variable
that is errno that may or may not exist at link time. I have a bit of
legacy code and the link step fails not the compile step.
If the cross compiler defines errno as a true external int (which is
permissible under the standard) but of course it is not portable.
--
Thanks
KenF
OpenOffice.org developer
