Buildroot fails on MIPS32 in uclibc

[Rob Landley]

On Saturday 29 November 2008 15:44:20 Denys Vlasenko wrote:
> On Saturday 29 November 2008 18:18, Alexander Voropay wrote:
> > Hi!
> >
> >  I have the same error under Linux (OpenSUSE) with current
> > uClibc snapshot and have no such probles with uClibc 0.9.29 release.
>
> libc/sysdeps/linux/mips/bits/socket.h needs libc_hidden_proto here:
>
>
>  extern struct cmsghdr * __NTH (__cmsg_nxthdr (struct msghdr *__mhdr,
>                                       struct cmsghdr *__cmsg)) __THROW;
> +libc_hidden_proto(__cmsg_nxthdr)

Is there any documentation on libc_hidden_proto()?  I read the big comment 
block in include/libc-symbols.h and I'm pretty sure PLT is Procedure Linkage 
Table from the ELF spec and I vaguely recall weak symbols are ones that the 
linker remembers but doesn't stop at, so it'll only use that linkage if it 
doesn't find a non-weak definition of the same symbol later on.  (Although if 
weak symbols really worked then you could --as-needed libpthread, and you 
can't.  Although busybox should still be able to use --as-needed for libm 
instead of the horrible "do we need to link in libm" dance the makefile 
currently does, but that's a separate issue.)

Anyway, is there something I should be reading here to get properly up to 
speed on this instead of being vaguely confused in passing, as I've been for a 
while now?  (I checked the uClibc docs directory, and it really might as well 
not exist.)

Rob