On 14/12/16 22:43, Peter Dufault wrote:
Can someone help clarify the issue?
Is this a “required compiler to build RTEMS” question? That is, are
the compilers currently required to build the RTEMS Sebastian modified
guaranteed to support C11 mutexes, and is it desirable to be more
conservative about what compiler is needed?
If C11 mutexes guarantee what Sebastian needs and unknown compiler
support isn’t required then allow it.
Note that I haven’t researched this, I’m just guessing that the C11
mutexes may guarantee less than the classic semaphores, and are being
implemented at the compiler level, and that this minimum level of
compiler support is OK for building RTEMS.
The C11 support is not a compiler issue. The <threads.h> is a part of
the C standard library and for RTEMS this header file is provided by Newlib:
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;a=blob;f=newlib/libc/include/threads.h;h=9fb08b03d1eb20024c0d680a7924336ec7ea57bb;hb=HEAD
This header file is compatible to C89 (with the next Newlib release). I
imported several parts of the FreeBSD <sys/cdefs.h> for this purpose.
The C11 <threads.h> provided functions are implemented in RTEMS:
https://git.rtems.org/rtems/tree/cpukit/libstdthreads
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
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Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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