[patch] libstdc++/65393 move shared_ptrs in thread::_M_make_thread

Jonathan Wakely jwakely@redhat.com
Tue Jun 16 17:53:00 GMT 2015

This is a small optimisation to avoid atomic updates to the
ref-counts. I have a bigger change in the pipeline for the trunk, but
this is an incremental improvement and is safe for gcc-5-branch.

Tested powerpc64le-linux, committed to trunk.
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