This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: [PATCH 06/21] ARC: Atomics and Locking primitives
On Tue, 18 Dec 2018, Vineet Gupta wrote:
> +#define USE_ATOMIC_COMPILER_BUILTINS 0
There is a strong preference for new ports to use 1 for this rather than 0
(and not to have any asms in their atomic-machine.h unless there's some
reason use of built-in functions is unsuitable) - see the recently posted
C-Sky version, for example. If you can't use 1, there should be a good
reason, documented in a comment, for using asms instead of compiler
built-in functions (e.g. if the compiler built-in functions would result
in libatomic dependencies, which are unsuitable for glibc, rather than
being expanded inline).
--
Joseph S. Myers
joseph@codesourcery.com