<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 1, 2021 at 8:06 AM Gedare Bloom <<a href="mailto:gedare@rtems.org">gedare@rtems.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Thu, Apr 1, 2021 at 6:21 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
><br>
> Hi Dr. Joel and Dr. Gedare,<br>
><br>
> I posted my draft proposal on the GSOC 2021 page<br>
> (<a href="https://devel.rtems.org/wiki/GSoC/2021" rel="noreferrer" target="_blank">https://devel.rtems.org/wiki/GSoC/2021</a>). At your convenience, I would<br>
> be very grateful for any comments or additional guidance you might<br>
> have. Please note, I found implementations of some of the "clock"<br>
> methods on glibc...does the GNU "Lesser General Public License" meet<br>
> the intent for what RTEMS can use?<br>
><br>
No. LGPL has a 'relinking' requirement that is not compatible.<br></blockquote><div><br></div><div>Also if I am right, the new "clock" methods should be straightforward to </div><div>implement on RTEMS. Internally, there are "watchdog sets" which are</div><div>based on different clock sources. I think now it is implicitly using one </div><div>when it should allow the user to specify which "watchdog set" is used.</div><div><br></div><div>And then.. tests.</div><div><br></div><div>It was lost somewhere from an earlier message but the column </div><div>"<span style="color:rgb(0,0,0);font-size:13.3333px">RTEMS w/ Networking" is intended to reflect adding rtems-libbsd.</span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px"><br></span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px">I also have a v10 of the spreadsheet in the queue which adds</span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px">columns for FACE Technical Standard, Edition 3.1.</span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px"><br></span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px">If you spot methods that need adding, please post small patches </span></div><div><span style="color:rgb(0,0,0);font-size:13.3333px">so we can update rtems-docs and I can pick it up in v10.</span></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
> Also, regarding the spawn.h group of methods, do I understand<br>
> correctly that they've been deliberately left out? If so, I'm curious<br>
> if there is anything that would still need to be done there. I noticed<br>
> in the docs that some methods relating to new processes are supported<br>
> in an adapted fashion (such as getpid()). Just wondering if there has<br>
> been discussion on this for spawn so I can cover the bases.<br>
><br>
RTEMS provides conceptually a single-process, multi-threaded, single<br>
address space. So, any POSIX APIs that relate to multiple process<br>
management tend to be unsupportable or meaningless. Spawn falls in the<br>
same category as fork, it doesn't make sense to create a child process<br>
in a single-process environment.<br></blockquote><div><br></div><div>This from the POSIX Compliance Guide may help:<br><br><a href="https://docs.rtems.org/branches/master/posix-compliance/preface.html">https://docs.rtems.org/branches/master/posix-compliance/preface.html</a></div><div><br></div><div>If it isn't clear after that, then we need to update that section. :)</div><div><br></div><div>Don't forget to get your proposal in.</div><div><br></div><div>--joel </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
> Thank you very much for your time!<br>
><br>
> Sincerely,<br>
><br>
> Matt<br>
><br>
> On Thu, Mar 25, 2021 at 2:18 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> ><br>
> ><br>
> ><br>
> > On Thu, Mar 25, 2021 at 7:14 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >><br>
> >> Hi Dr. Joel,<br>
> >><br>
> >> Thanks very much, that's a big help! Correct, I've been updating the<br>
> >> spreadsheet as I go along. Ok, now I see that strlcat/strlcpy are used<br>
> >> in rtems/cpukit and implemented in Newlib.<br>
> >><br>
> >> One additional question, please: I haven't yet looked into the source<br>
> >> of NetBSD or FreeBSD, but I do see that Newlib already implements<br>
> >> ppoll (poll.cc), dladdr (dlfcn.cc), pselect (select.cc), and<br>
> >> sockatmark (net.cc). None of them are defined in the rtems environment<br>
> >> yet. Is there any reason why the NetBSD/FreeBSD version would be<br>
> >> preferable to Newlib for these? Or is it just a matter of testing<br>
> >> what's out there to find what works well in the rtems environment?<br>
> ><br>
> ><br>
> > Without looking at the newlib git repo, I can tell you that the files<br>
> > you cite are the implementation of those methods for Cygwin. Just<br>
> > because they are in C++. :)<br>
> ><br>
> > The parts of the newlib repo RTEMS uses are under the newlib/<br>
> > subdirectory not the cygwin one. Within that, there is a libc/sys and<br>
> > only libc/sys/rtems is used for RTEMS. The others are for different<br>
> > operating systems. There are a few places with "machine" directory<br>
> > structures. Only the ones for the architecture you are building for<br>
> > is used.<br>
> ><br>
> > As to why NetBSD for libdl, that is because portions of the code<br>
> > originated there.<br>
> ><br>
> > And rtems-libbsd is based on FreeBSD. It is as close to the FreeBSD<br>
> > source as we can keep it.<br>
> ><br>
> >><br>
> >><br>
> >> In my proposal I'll take your advice and work on some of the easier<br>
> >> ones first in order to get the experience and process down.<br>
> ><br>
> ><br>
> > There are tickets for a lot of methods. The rtems-docs repo has the<br>
> > csv file (e.g. spreadsheet) which tracks RTEMS support against<br>
> > various standards. The RTEMS POSIX Compliance Guide is generated<br>
> > from that csv file. Between those, you can find other methods to ask<br>
> > about. In general, if it is required by the Software Communications<br>
> > Architecture (SCA) or FACE Technical Standard, then it is a method<br>
> > someone expected to possibly be used in an embedded system.<br>
> > SCA is a set of POSIX profiles focused on software defined radios and<br>
> > the FACE Technical Standard was developed with avionics in mind.<br>
> ><br>
> > But any are fair game if they are actually implementable. I don;t think<br>
> > the Compliance Guide says it yet, but we decided last year that<br>
> > wordexp() is likely not supportable on RTEMS. The newlib<br>
> > implementation assumes the presence of a shell with wildcard expansion<br>
> > and ability to fork a process.<br>
> ><br>
> > --joel<br>
> ><br>
> >><br>
> >><br>
> >> Thank you again for your time!<br>
> >><br>
> >> Matt<br>
> >><br>
> >> On Wed, Mar 24, 2021 at 5:03 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> ><br>
> >> > Wow! Good work. There is a lot to digest here. Comments interspersed.<br>
> >> ><br>
> >> > I assume the spreadsheet is updated.<br>
> >> ><br>
> >> > On Wed, Mar 24, 2021 at 7:38 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >> >><br>
> >> >> Hi Dr. Joel,<br>
> >> >><br>
> >> >> I've gone over the list a few times now and see a few categories shaping up:<br>
> >> >><br>
> >> >> 1) Already done (In Newlib source, defined in libc.a):<br>
> >> >> a) reallocarray<br>
> >> >> b) qsort_r<br>
> >> >> c) memmem<br>
> >> >> d) strlcat / strlcpy<br>
> >> >> d) wcslcat / wcslcpy<br>
> >> >> *Out of this group, strlcat and strlcpy also show up in<br>
> >> >> src/rtems/cpukit. Why is that?<br>
> >> ><br>
> >> ><br>
> >> > The good news is that we support these. :)<br>
> >> ><br>
> >> > It looks to me that strlcat and strlcpy are used in cpukit but not implemented<br>
> >> > there. Where do you think they are implemented.<br>
> >> ><br>
> >> > This is a good example where a source code browser is helpful. grep can<br>
> >> > often answer the question but a source code browser can be easier. Personally,<br>
> >> > I use cscope but that is exceedingly old school. Any modern IDE should be<br>
> >> > helpful.<br>
> >> ><br>
> >> >><br>
> >> >> 2) Not done yet (Do not show up in Newlib source or RTEMS):<br>
> >> >> a) getlocalename_l<br>
> >> >> b) posix_getdents<br>
> >> >> c) sem_clockwait<br>
> >> >> d) sig2str / str2sig<br>
> >> >><br>
> >> >> 3) Not in Newlib; Referenced in RTEMS but hidden behind #ifdef:<br>
> >> >> a) pthread_cond_clockwait<br>
> >> >> (rtems/6/lib/gcc/sparc-rtems6/10.2.1/include/c++/condition_variable)<br>
> >> >> b) pthread_mutex_clocklock<br>
> >> >> (rtems/6/lib/gcc/sparc-rtems6/10.2.1/include/c++/mutex)<br>
> >> >> c) pthread_rwlock_clockrdlock<br>
> >> >> (rtems/6/lib/gcc/sparc-rtems6/10.2.1/include/c++/shared_mutex)<br>
> >> >> c) pthread_rwlock_clockwrlock<br>
> >> >> (rtems/6/lib/gcc/sparc-rtems6/10.2.1/include/c++/shared_mutex)<br>
> >> >> *It looks like some groundwork was done, but the methods are not yet supported.<br>
> >> ><br>
> >> ><br>
> >> > The paths you point to are C++ files that would implement C++ features<br>
> >> > using the available POSIX services. So they are users, not providers.<br>
> >> ><br>
> >> > All of the pthread services related to these are implemented in<br>
> >> > cpukit/posix/src. I think you can configure a clock for all these now<br>
> >> > to be used by detailed on wait and timedwait calls. My understanding<br>
> >> > is that these would let you use a specific clock on a per blocking call<br>
> >> > basis.<br>
> >> ><br>
> >> > First question is which clocks are intended to be supported.<br>
> >> ><br>
> >> > Second is the pattern of picking which timeout queue to go on when<br>
> >> > now it is coded to let you pick one which is used for the life of the object.<br>
> >> ><br>
> >> >><br>
> >> >> 4) Misc (In Newlib source, not defined in libc.a, appear in RTEMS in<br>
> >> >> various ways)<br>
> >> >> a) getentropy (an alternate version is defined in RTEMS librtemsbsd.a,<br>
> >> >> in src/rtems/bsps/shared/dev/getentropy/getentropy-cpucounter.c. The<br>
> >> >> comments note that it is not cryptographically secure, so it may not<br>
> >> >> fit the bill for the getentropy() mentioned in the Open Group<br>
> >> >> document)<br>
> >> ><br>
> >> ><br>
> >> > I am far from a cryptography expert but this looks like a case where<br>
> >> > this method would be considered supported with the disclaimer that<br>
> >> > the quality of the entropy value depends on the BSP. If the user has<br>
> >> > specific requirements, they will need to verify the implementation<br>
> >> > used by the BSP by default is appropriate.<br>
> >> ><br>
> >> >><br>
> >> >> b) ppoll (appears in rtems/6/share/gdb/syscalls)<br>
> >> ><br>
> >> ><br>
> >> > You need to be more careful with the grep. These again are in the<br>
> >> > installed tools and in this case, they appear in an XML file. Referenced<br>
> >> > but not implemented.<br>
> >> ><br>
> >> > ppoll() will need to come from rtems-libbsd. The required system call<br>
> >> > is included but disabled currently. AFAIK this means it is possible to<br>
> >> > provide this but that would require a more detailed discussion in case<br>
> >> > some underlying capability is missing. Chris Johns and Sebastian<br>
> >> > Huber would be the ones to guide here.<br>
> >> ><br>
> >> > Ruling: Likely possible.<br>
> >> ><br>
> >> >><br>
> >> >> c) dladdr (appears in rtems/cpukit but not defined)<br>
> >> ><br>
> >> ><br>
> >> > I think this can be implemented in libdl but I am not sure if the<br>
> >> > code from NetBSD from this would directly work or just be a guide.<br>
> >> ><br>
> >> >><br>
> >> >><br>
> >> >> 5) Others?<br>
> >> >> It looks like there was work done on methods like sockatmark and<br>
> >> >> pselect, but I don't see them supported as yet. Should those be added<br>
> >> >> to the list or are they still being worked on?<br>
> >> ><br>
> >> ><br>
> >> > These would come from rtems-libbsd.<br>
> >> ><br>
> >> > I think sockatmark.c is implemented in freebsd/lib/libc/net/sockatmark.c<br>
> >> > but I don't know if the ioctl() is implemented. I expect it is but this would<br>
> >> > at least require a test. It may just work.<br>
> >> ><br>
> >> > pselect() looks to be missing and would have to be ported from FreeBSD.<br>
> >> ><br>
> >> >><br>
> >> >> As you suggested, I'll look into NetBSD for dladdr and do some digging<br>
> >> >> on the implementation of the other outstanding methods. You mentioned<br>
> >> >> that the "clock" ones have to be strictly added to rtems/cpukit, but<br>
> >> >> the references I found above are all in lib/gcc/sparc-rtems6/<a href="http://10.2.1." rel="noreferrer" target="_blank">10.2.1.</a><br>
> >> >> Why is that the case and what is 10.2.1? Also, I'm not sure what to<br>
> >> >> make of getentropy and ppoll based on what I found above...at your<br>
> >> >> convenience could you please advise?<br>
> >> ><br>
> >> ><br>
> >> > Hopefully the above helped.<br>
> >> ><br>
> >> > You don't have to restrict your possible set to these new additions.<br>
> >> > There are others. I think Eshan has done the research for where to<br>
> >> > get implementations of the missing long double methods for newlib.<br>
> >> > And there are tickets for other missing methods or specific capabilities<br>
> >> > in methods that are supported. Those are quite possible to have<br>
> >> > some alternatives that are easier to approach.<br>
> >> ><br>
> >> > --joel<br>
> >> ><br>
> >> ><br>
> >> >><br>
> >> >><br>
> >> >> Thank you very much!<br>
> >> >><br>
> >> >> Matt<br>
> >> >><br>
> >> >><br>
> >> >><br>
> >> >><br>
> >> >> On Sun, Mar 21, 2021 at 6:38 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> >> ><br>
> >> >> ><br>
> >> >> ><br>
> >> >> > On Sun, Mar 21, 2021 at 2:28 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >> >> >><br>
> >> >> >> Gentlemen,<br>
> >> >> >><br>
> >> >> >> Awesome, thanks! I see how that works now...I'll give it a thorough<br>
> >> >> >> look tomorrow and will update the spreadsheet accordingly. I'll pipe<br>
> >> >> >> back up when I have a more accurate look of what's currently there.<br>
> >> >> ><br>
> >> >> ><br>
> >> >> > Knowing what doesn't have to be done is the first step. (rtems, newlib, and libbsd)<br>
> >> >> ><br>
> >> >> > I'd be prone to look for things that are easy to add first.<br>
> >> >> ><br>
> >> >> > Some may not be implementable on RTEMS due to only supporting a<br>
> >> >> > single process and no virtual memory. If you have doubts on whether it<br>
> >> >> > is possible to support a specific method, speak up and let's try to decide.<br>
> >> >> ><br>
> >> >> > Then find upstream places for an implementation where possible. I suspect<br>
> >> >> > all the new "clock" methods will require discussion on an implementation<br>
> >> >> > pattern but those must strictly be added to rtems/cpukit with tests and<br>
> >> >> > documentation. At least I can throw you that much. :)<br>
> >> >> ><br>
> >> >> >><br>
> >> >> >> Thanks again and have a great Sunday!<br>
> >> >> >><br>
> >> >> >> Matt<br>
> >> >> >><br>
> >> >> >> On Fri, Mar 19, 2021 at 8:27 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> >> >> ><br>
> >> >> >> ><br>
> >> >> >> ><br>
> >> >> >> > On Fri, Mar 19, 2021 at 1:08 PM Gedare Bloom <<a href="mailto:gedare@rtems.org" target="_blank">gedare@rtems.org</a>> wrote:<br>
> >> >> >> >><br>
> >> >> >> >> On Fri, Mar 19, 2021 at 11:16 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >> >> >> >> ><br>
> >> >> >> >> > Dr. Joel,<br>
> >> >> >> >> ><br>
> >> >> >> >> > Thanks very much...I'll keep working to get a sense of what goes<br>
> >> >> >> >> > where! In the meantime, where can I look to get the ground truth of<br>
> >> >> >> >> > which methods are "in RTEMS" as opposed to those in newlib?<br>
> >> >> >> >> ><br>
> >> >> >> >> There is only one ground truth:<br>
> >> >> >> >> git://<a href="http://git.rtems.org/rtems.git" rel="noreferrer" target="_blank">git.rtems.org/rtems.git</a><br>
> >> >> >> >><br>
> >> >> >> >> And for newlib<br>
> >> >> >> >><br>
> >> >> >> >> git://<a href="http://sourceware.org/git/newlib-cygwin.git" rel="noreferrer" target="_blank">sourceware.org/git/newlib-cygwin.git</a><br>
> >> >> >> >><br>
> >> >> >> >> That said, searching for the function name symbols in compiled<br>
> >> >> >> >> libraries is a good first step to rule out newlib. Then, you can<br>
> >> >> >> >> 'grep' the RTEMS source code for the function names to see if they<br>
> >> >> >> >> exist there.<br>
> >> >> >> ><br>
> >> >> >> ><br>
> >> >> >> > rtems/cpukit to be specitic. It won't be implemented anywhere else.<br>
> >> >> >> ><br>
> >> >> >> > And clearly we both have forgotten that networking APIs are in the<br>
> >> >> >> > rtems-libbsd repository.<br>
> >> >> >> ><br>
> >> >> >> > <a href="https://git.rtems.org/rtems-libbsd/" rel="noreferrer" target="_blank">https://git.rtems.org/rtems-libbsd/</a><br>
> >> >> >> ><br>
> >> >> >> > I suspect ppoll() might already be in there. Or at least supported by<br>
> >> >> >> > FreeBSD.<br>
> >> >> >> ><br>
> >> >> >> > You should clone everything and grep the sources. newlib already has<br>
> >> >> >> > qsort_r. This is the nm I used:<br>
> >> >> >> ><br>
> >> >> >> > $ ~/rtems-work/tools/6/bin/sparc-rtems6-nm ~/rtems-work/tools/6/sparc-rtems6/lib/libc.a | grep qsort_r<br>
> >> >> >> > lib_a-bsd_qsort_r.o:<br>
> >> >> >> > 00000000 T __bsd_qsort_r<br>
> >> >> >> > lib_a-qsort_r.o:<br>
> >> >> >> > 00000000 T qsort_r<br>
> >> >> >> ><br>
> >> >> >> > Notice the last line has "T qsort_r" which says it is defined.<br>
> >> >> >> ><br>
> >> >> >> > grep -r in the newlib source shows it is in ./libc/search/qsort_r.c<br>
> >> >> >> ><br>
> >> >> >> > dladdr() looks to be prototyped in RTEMS but hidden behind an ifdef like it<br>
> >> >> >> > wasn't ported from NetBSD so that looks possible. It is in rtems.<br>
> >> >> >> ><br>
> >> >> >> > Those two examples should help you figure out why you missed<br>
> >> >> >> > finding some things that were implemented.<br>
> >> >> >> ><br>
> >> >> >> > I need to figure out what this next POSIX version is to be called<br>
> >> >> >> > so I can update the tracking spreadsheet that generates the RTEMS<br>
> >> >> >> > POSIX Compliance Guide, :)<br>
> >> >> >> ><br>
> >> >> >> > --joel<br>
> >> >> >> >><br>
> >> >> >> >><br>
> >> >> >> >> > Thanks again!<br>
> >> >> >> >> ><br>
> >> >> >> >> > Matt<br>
> >> >> >> >> ><br>
> >> >> >> >> > On Fri, Mar 19, 2021 at 1:58 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > Keep devel@ on the list. :)<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > On Fri, Mar 19, 2021 at 7:51 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> Sir,<br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> Thank you for the link! I see that you're right, those last four are<br>
> >> >> >> >> > >> in newlib, plus memmem(). I updated those in the Google Sheet.<br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> Now I see the newlib part, but where are you referring to specifically<br>
> >> >> >> >> > >> when you say RTEMS, as in "POSIX support comes from a mix of RTEMS and<br>
> >> >> >> >> > >> newlib"?<br>
> >> >> >> >> > ><br>
> >> >> >> >> > ><br>
> >> >> >> >> > > POSIX is a HUGE HUGE standard and references other standards. One<br>
> >> >> >> >> > > it references and pulls in is the C99 Standard C Library which is libc and<br>
> >> >> >> >> > > libm. RTEMS mostly does not implement this functionality and relies on<br>
> >> >> >> >> > > another open source project for those APIs. Newlib is an open source<br>
> >> >> >> >> > > C Library used by RTEMS, Cygwin, and most embedded systems GNU tools<br>
> >> >> >> >> > > chains.<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > Most of the POSIX header files with RTEMS are actually in Newlib even<br>
> >> >> >> >> > > if they originated with RTEMS. Many are shared with Cygwin.<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > So methods like the string, memory, and *printf come from Newlib since they<br>
> >> >> >> >> > > are in C99. We provide POSIX like threading, signals, core file access, and<br>
> >> >> >> >> > > much more.<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > It's a complementary relationship but it takes a bit to figure out when<br>
> >> >> >> >> > > something should be in one or the other. The line gets blurred at times.<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > Say you added a new CPU architecture implementation of a math<br>
> >> >> >> >> > > method (like Eshan did last year), then it goes in newlib. But he also<br>
> >> >> >> >> > > added some POSIX methods which go in RTEMS. In either case,<br>
> >> >> >> >> > > we like tests for them in RTEMS to show they work in our environment.<br>
> >> >> >> >> > ><br>
> >> >> >> >> > > --joel<br>
> >> >> >> >> > ><br>
> >> >> >> >> > ><br>
> >> >> >> >> > ><br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> Thanks again!<br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> Matt<br>
> >> >> >> >> > >><br>
> >> >> >> >> > >> On Fri, Mar 19, 2021 at 1:13 PM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> > On Fri, Mar 19, 2021, 6:40 AM Joel Sherrill <<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>> wrote:<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >> On Fri, Mar 19, 2021, 5:48 AM Matthew Joyce <<a href="mailto:mfjoyce2004@gmail.com" target="_blank">mfjoyce2004@gmail.com</a>> wrote:<br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> <a href="https://docs.google.com/spreadsheets/d/1reCNOIZC5JTwQENgl-hvG8THfQqNtlUDVy_07PYodic/edit?usp=sharing" rel="noreferrer" target="_blank">https://docs.google.com/spreadsheets/d/1reCNOIZC5JTwQENgl-hvG8THfQqNtlUDVy_07PYodic/edit?usp=sharing</a><br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> Hello,<br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> As suggested by Dr. Sherril, I've taken an initial look through this<br>
> >> >> >> >> > >> >>> document <a href="https://www.opengroup.org/austin/docs/austin_1110.pdf" rel="noreferrer" target="_blank">https://www.opengroup.org/austin/docs/austin_1110.pdf</a> and<br>
> >> >> >> >> > >> >>> added the new methods to a Googe Sheet, linked above.<br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> None of them appear to be in the RTEMS POSIX API Users Guide, but<br>
> >> >> >> >> > >> >>> maybe that's not the right place to look. I'll stand by for your<br>
> >> >> >> >> > >> >>> feedback regarding what's possible / desirable to add to RTEMS.<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >> It is possible they are in our C Library or Math Library. Or just not in the manual. The POSIX manual tends to be sparse since you can always use man pages or the POSIX standard.<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >> Since you have RTEMS and tools built. Find one of the libc.a and libm.a files in the tools install and librtemscpu.a in the RTEMS build or install. Then try a command something like this:<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >> CPU-rtems6-nm LIBRARY | grep SYMBOL<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >> If you see it list with T then it is in the text section and there.<br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> > Following up, I initially answered from my phone and didn't look at source. I am still on my phone but looked through the list and think the last four methods are probably the only ones currently supported.<br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> > <a href="https://sourceware.org/git/?p=newlib-cygwin.git;a=tree;f=newlib/libc/string;h=ceeec602cdd0e6b5c6b002b741bda9b41da4e441;hb=HEAD" rel="noreferrer" target="_blank">https://sourceware.org/git/?p=newlib-cygwin.git;a=tree;f=newlib/libc/string;h=ceeec602cdd0e6b5c6b002b741bda9b41da4e441;hb=HEAD</a><br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> > POSIX support comes from a mix of RTEMS and newlib. That's key to this type of project.<br>
> >> >> >> >> > >> ><br>
> >> >> >> >> > >> > --joel<br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >><br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> Thanks very much for your time!<br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> Sincerely,<br>
> >> >> >> >> > >> >>><br>
> >> >> >> >> > >> >>> Matt<br>
> >> >> >> >> > _______________________________________________<br>
> >> >> >> >> > devel mailing list<br>
> >> >> >> >> > <a href="mailto:devel@rtems.org" target="_blank">devel@rtems.org</a><br>
> >> >> >> >> > <a href="http://lists.rtems.org/mailman/listinfo/devel" rel="noreferrer" target="_blank">http://lists.rtems.org/mailman/listinfo/devel</a><br>
</blockquote></div></div>