Missing pthread support for custom libc

[Eric van Gyzen]

On 1/23/17 7:20 PM, Derrick McKee wrote:
> I've compiled libc using a custom version of clang, and it seems to be
> missing pthread support.  When I try to compile Firefox and use my version
> of libc, I get the following error:
>
> checking for pthread_create in -lpthreads... no
> checking for pthread_create in -lpthread... no
> checking for pthread_create in -lc_r... no
> checking for pthread_create in -lc... no
> configure: error: --with-pthreads specified for a system without pthread
> support

FreeBSD's pthread support is provided by libpthread, a.k.a. libthr, the 
source for which is in base/lib/libthr.

Cheers,

Eric