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Re: [gpsd-dev] Fw: [gpsd-commit-watch] [SCM] GPSD branch, master, update
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From: |
Eric S. Raymond |
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Subject: |
Re: [gpsd-dev] Fw: [gpsd-commit-watch] [SCM] GPSD branch, master, updated. release-3.12-61-g16645be |
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Date: |
Thu, 26 Feb 2015 15:44:25 -0500 |
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User-agent: |
Mutt/1.5.23 (2014-03-12) |
Gary E. Miller <address@hidden>:
> > memory_barrier() now uses a standardized C11 lockless-concurrency
> > primitive.
>
> Wow, C11 a bit pushy. At least it is optional...
Yes. There's less actual change here than meets the eye; the same
compilers that would have supported the old, grubby implementation
(GCC >= 4.7) support stdatomic.h. It probably even compiles to the
same object code.
The main difference is that the C11 implementation should work under
clang >= 3.1. That gives me a happy feeling; I think clang support
is going to become increasingly important and want GPSD to stay
ahead of its adoption curve. One of my pre-release tests nowadays
is "scons -c; CC=clang scons check".
--
<a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>