tree dab67cfcdef725f8ed0e169d313cdd2c94575a16
parent e6ca125f14d0f677205d3247f26da60ab8069b9c
author Joel Sing <jsing@google.com> 1356014599 +1100
committer Joel Sing <jsing@google.com> 1356014599 +1100
golang-hg 220ddfb2006683498f865f0cbb36dde735db4b49

cgo: enable cgo on openbsd

Enable cgo on OpenBSD.

The OpenBSD ld.so(1) does not currently support PT_TLS sections. Work
around this by fixing up the TCB that has been provided by librthread
and reallocating a TCB with additional space for TLS. Also provide a
wrapper for pthread_create, allowing zeroed TLS to be allocated for
threads created externally to Go.

Joint work with Shenghou Ma (minux).

Requires change 6846064.

Fixes #3205.

R=golang-dev, minux.ma, iant, rsc, iant
CC=golang-dev
https://golang.org/cl/6853059