[Buildroot] Issue with pthread_mutex_lock with external toolchain

[Daniel Nyström]

2011/6/22 Dwi Sasongko Supriyadi <ruckuus at gmail.com>:
> 3. External toolchain from Code Sourcery 2010.09

pthread_mutex_lock is part of libc which itself is part of the
external toolchain package. Maybe try getting in contact with
CodeSourcery?