[Bug 242680] devel/subversion Fails to build on FreeBSD 12.1-RELEASE-p1 32 bit: libapr-1.so: undefined reference to `__sync_*

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=242680

lfmorrison at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |lfmorrison at gmail.com

--- Comment #3 from lfmorrison at gmail.com ---
These missing symbols appear to be associated with GCC's extensions for atomic
data handling.

See, for example:
https://gcc.gnu.org/onlinedocs/gcc-4.2.0/gcc/Atomic-Builtins.html (base GCC 4.2
specification)

https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/_005f_005fsync-Builtins.html#g_t_005f_005fsync-Builtins
(deprecated GCC9 feature)

https://gcc.gnu.org/onlinedocs/gcc-9.2.0/gcc/_005f_005fatomic-Builtins.html#g_t_005f_005fatomic-Builtins
(currently supported GCC9 equivalent)

It is possible that linkage to GCC's libatomic might be needed in order to
resolve these symbols? (I know that libatomic.so is installed as part of the
GCC9 port for powerpc, but I don't know if there's an equivalent library
supplied with the base compiler.)

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