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atomic_float/value_init.cc requires libatomic for some targets, i.e., when it tries to perform an atomic operation with a 64 bit floating point double type on a 32 bit target. This patch adds AIX and Darwin to the list of targets that require the libatomic option and adds the option to the atomic_float/value_init.cc testcase. libstdc++-v3/ChangeLog: 2020-07-28 David Edelsohn <dje.gcc@gmail.com> Jonathan Wakely <jwakely@redhat.com> Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> * testsuite/lib/dg-options.exp (add_options_for_libatomic): Add target powerpc-ibm-aix* and powerpc*-*-darwin*. * testsuite/29_atomics/atomic_float/value_init.cc: Add options for libatomic.
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