libc.so.6 dependencies

[Adhemerval Zanella Netto]

On 24/06/25 14:45, Alex Ernst wrote:
> Hello glibc developers,
> 
> Why do we have dependency on libgcc_s.so.1 for pthread_cance() and pthread_exit() (compared to older versions of glibc) ?
> 
> GLIBC 2.28: strings libc.so.6 | grep "must be installed for"
> libgcc_s.so.1 must be installed for unwinding to work
> 
> GLIBC 2.41: strings libc.so.6 | grep "must be installed for"
> libgcc_s.so.1 must be installed for unwinding to work
> libgcc_s.so.1 must be installed for pthread_cancel to work
> libgcc_s.so.1 must be installed for pthread_exit to work
> 

The dependency always existed, the 1d95b035c72 (glibc 2.33) moved __pthread_unwind_next
into libc and the refactor added more meaningful error messages depending of which
symbol triggered the dlopen failure.