toolchain/53051: __atomic_is_lock_free missing on NetBSD/sparc

[martin%NetBSD.org@localhost]

>Number:         53051
>Category:       toolchain
>Synopsis:       __atomic_is_lock_free missing on NetBSD/sparc
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Feb 24 19:20:00 +0000 2018
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.12
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD nelly.aprisoft.de 8.99.12 NetBSD 8.99.12 (NELLY) #22: Mon Feb 19 13:10:27 CET 2018 martin%seven-days-to-the-wolves.aprisoft.de@localhost:/work/src/sys/arch/sparc64/compile/NELLY sparc
Architecture: sparc
Machine: sparc
>Description:

After switching to gcc 6.4 some pkgsrc software fails to build:

./libcrypto.so: undefined reference to `__atomic_is_lock_free'


>How-To-Repeat:

Build wip/openssl110

>Fix:
n/a