Re: Glibc building procedure error report.

[Samuel Thibault]

Manolis Ragkousis, le Wed 02 Apr 2014 00:29:13 +0000, a écrit :
> >  /../build/libc_pic.os: In function `__fork':
> >  /../source/posix/../sysdeps/mach/hurd/fork.c:71: undefined reference to 
> > `__start__hurd_atfork_prepare_hook'
> >  /../gcc-cross-sans-libc-i686-pc-gnu-4.8.2/libexec/gcc/i686-pc-gnu/ld: 
> > /../build/libc_pic.os: relocation R_386_GOTOFF against undefined hidden >  
> > symbol `__start__hurd_atfork_prepare_hook' can not be used when making a 
> > shared object
> >  /../gcc-cross-sans-libc-i686-pc-gnu-4.8.2/libexec/gcc/i686-pc-gnu/ld: 
> > final link failed: Bad value
> >  collect2: error: ld returned 1 exit status
> >  ../Makerules:614: recipe for target '/../build/libc.so' failed
> >  make[2]: *** 
> > [/tmp/nix-build-glibc-hurd-cross-i686-pc-gnu-2.18.drv-38/build/libc.so] 
> > Error 1
> >  make[2]: Leaving directory 
> > '/tmp/nix-build-glibc-hurd-cross-i686-pc-gnu-2.18.drv-38/source/elf'
> >  Makefile:233: recipe for target 'elf/subdir_lib' failed
> 
> I searched the source files in posix and sysdeps/mach/hurd/ and I
> can't seem to find any reference to
> `__start__hurd_atfork_prepare_hook'.
> 
> Any ideas?

In such cases, look for subparts of the name, here atfork_prepare, and
you'll see 

sysdeps/mach/hurd/fork.c:DEFINE_HOOK (_hurd_atfork_prepare_hook, (void));

The symbol is supposed to be defined automagically by the linker.  I
don't know how exactly.  A workaround is to add lines in Makerules just
like there are for *__libc_thread_subfreeres, but it'd be very good to
investigate what is not working in your environment.

Samuel