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Re: Binary compatibility loss regarding errno
On Mon, Dec 23, 2002 at 10:02:04AM -0800, Ulrich Drepper wrote:
> Daniel Jacobowitz wrote:
>
> > This is a pretty severe problem, since it silently makes applications ignore
> > errno.
>
> It's not silent. The dynamic linker will not find a definition of errno
> and terminate the application run. And that's what the program
> deserves. The errno macro has been there forever. Fix your binaries.
> I will not allow broken binaries to get into the way of progress.
No, it IS silent. Feel free to try it yourself, or I can send you a
test binary. Compile the code in my last message against glibc 2.2.5
and run it against 2.3 CVS; note that the program runs yet rename fails
to change the value of errno (ENOENT is 2, not 1).
I wouldn't like a dynamic link time failure, but at least then we'd
know what was going on; we can cope with that if we have to. This one
is nastier.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer