From owner-freebsd-stable@freebsd.org  Thu Sep 22 23:31:37 2016
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From: Chris Stankevitz <chris@stankevitz.com>
To: freebsd-stable@freebsd.org
Subject: Source upgrade to 10.3: Undefined symbol "__set_error_selector"
Message-ID: <736b94be-3e0b-5723-d89d-fc1dd0584b10@stankevitz.com>
Date: Thu, 22 Sep 2016 16:22:47 -0700
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FYI (issue is resolved so I'm just reporting for posterity)...

I have four offline ("air gapped") FreeBSD systems with nearly identical 
hardware.  Two started life as 10.1-RELEASE and the other two started 
life as 10.2-RELEASE.

All are kept up to date by bringing over /usr/src for their associated 
releases (using 'svn co https://svn.freebsd.org/base/releng/10.x') and 
make/buildworld.

All were upgraded to 10.3-p5 and failed 'make installworld' with:

/lib/libthr.so.3: Undefined symbol "__set_error_selector"

All resolved with 'cd /usr/src/lib/libc && make install && cd /usr/src 
&& make installworld'

Chris