Segfault when linking with -pthread on recent stable/10 ARM

[Renato Botelho]

I’m building some packages for arm.armv6 on stable/10 for a while using poudriere + native-tools. Last week I updated jails to recent stable/10 and started to see the same issue on 2 ports (net/openldap24-client and net/ntp). I noted there were a lot of ARM MFCs recently so probably we got a regression at some point.

I also created a regular jail, without native-xtools, and result is the same:

checking for GNU Pth pthread.h... no
checking for sched.h... (cached) yes
checking for pthread_create in default libraries... no
checking for pthread link with -kthread... no
checking for pthread link with -pthread... Segmentation fault (core dumped)
no
checking for pthread link with -pthreads... no
checking for pthread link with -mthreads... no
checking for pthread link with -thread... no
checking for pthread link with -lpthread -lmach -lexc -lc_r... no
checking for pthread link with -lpthread -lmach -lexc... no
checking for pthread link with -lpthread -Wl,-woff,85... no
checking for pthread link with -lpthread... Segmentation fault (core dumped)
no
checking for pthread link with -lc_r... no
checking for pthread link with -threads... no
checking for pthread link with -lpthreads -lmach -lexc -lc_r... no
checking for pthread link with -lpthreads -lmach -lexc... no
checking for pthread link with -lpthreads -lexc... no
checking for pthread link with -lpthreads... no
configure: error: could not locate usable POSIX Threads
===>  Script "configure" failed unexpectedly.
Please report the problem to delphij at FreeBSD.org [maintainer] and attach the
"/wrkdirs/usr/ports/net/openldap24-client/work/openldap-2.4.40/config.log"
including the output of the failure of your make command. Also, it might be
a good idea to provide an overview of all packages installed on your system
(e.g. a /usr/local/sbin/pkg-static info -g -Ea).
*** Error code 1

I've collected conftest.c used by configure and also compiler arguments used during test:

http://pastebin.com/7hwn9LSW

--
Renato Botelho