Hello Alan,
On 12/09/2018 20:45, Cudmore, Alan P. (GSFC-5820) wrote:
Hello,
We are building our RTEMS applications with -std=c99 and other
compiler warning switches.
On the latest RTEMS master and RTEMS 5 toolchain ( from yesterday ),
when I include the -std=c99 compiler switch, the compilation fails in
an RTEMS header.
I would not use C99 for multi-threaded programs. C11 is the first C
standard which knows what a thread is.
Is it not recommended to use the “-std= “ switches when building RTEMS
applications, or is this something that we should fix? We are able to
use the “-std=c99” switches in 4.11. I noticed that the timestamp.h
file did change between 4.11 and 5.x.
Yes, this is a known issue. RTEMS uses now the FreeBSD-specific struct
bintime and sbintime for its internal timestamps. Unfortunately, this
implementation detail is leaked via <rtems.h>. There are several ways to
fix this. We could expose the FreeBSD-specific API unconditionally in
<sys/types.h>. We could also try to hide this implementation detail from
<rtems.h>.
Firstly, if it is supposed to compile <rtems.h> with a particular -std=*
switch, then we should test this.
--
Sebastian Huber, embedded brains GmbH
Address : Dornierstr. 4, D-82178 Puchheim, Germany
Phone : +49 89 189 47 41-16
Fax : +49 89 189 47 41-09
E-Mail : sebastian.hu...@embedded-brains.de
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Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.
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