On Thu, Sep 13, 2018, 9:25 PM Chris Johns <chr...@rtems.org> wrote: > On 14/09/2018 10:13, Joel Sherrill wrote: > > On Thu, Sep 13, 2018, 5:40 PM Chris Johns <chr...@rtems.org > > <mailto:chr...@rtems.org>> wrote: > > On 14/09/2018 02:30, Joel Sherrill wrote: > > > On Thu, Sep 13, 2018, 10:34 AM Sebastian Huber > > > <sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de> > > <mailto:sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de>>> > > > wrote: > > > ----- Am 13. Sep 2018 um 14:07 schrieb joel j...@rtems.org > > <mailto:j...@rtems.org> > > > <mailto:j...@rtems.org <mailto:j...@rtems.org>>: > > > > > > > On Thu, Sep 13, 2018, 3:28 AM Sebastian Huber < > > > > sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de> > > > <mailto:sebastian.hu...@embedded-brains.de > > <mailto:sebastian.hu...@embedded-brains.de>>> wrote: > > > > > > > >> Hello, > > > >> > > > >> I test currently the tqm8xx BSP which worked fine until > RTEMS 5. The > > > >> problem is that this BSP uses strtoul() to get some system > > configuration > > > >> parameters from the boot loader. The Newlib used by RTEMS 5 > has now > > > >> support for C locales in strtoul(). The C locale support > needs an > > > >> executing thread with a valid Newlib reentrancy structure. > This is > > > >> definitely not the case during bsp_start(). > > > >> > > > > > > > > Why do we now longer have a global reentrancy structure to > fall back on? > > > > > > I think having a global reentrancy as a fall back just for the > lowest > > level > > > system start without an idle thread is a bit of overkill. > > > > > > The heavy weight C local support which was recently introduced > in > > Newlib is > > > not really the right thing for the embedded systems I know. > There were > > > several complaints about this on the Newlib mailing list as > well. The > > root > > > cause for this is the C standard. So, basically the C standard > > strtoul() is > > > unsuitable for embedded systems. The FreeBSD > (sys/kern/strtoul.c) and > > Linux > > > (lib/kstrtox.c) kernel have their own implementations. > > > > > > > > > FWIW the FACE Technical Standard does not include wide characters > in ANY > > profile > > > as of Edition 3.0. None of the RTOS vendors knew of any avionics > users. It > > > wasn't viewed as a necessary feature. We could consider disabling > it by > > default. > > > > > > > Is this something we could ot would want to control with newlib via > a config > > option? > > > > > > We don't turn on locale for h8, m32c and maybe not epiphany. I am pretty > sure.it > > <http://sure.it> is an option. And should be a documented RSB option to > turn it > > back on. Should be a size savings for most users. > > We turn on or off as an option? >
Based on Sebastian's observation, I think off. Does this impact wide characters and multibyte? We will need to document the impact. I suspect it removes some POSIX support in a base build. > > Chris >
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