I submitted a fix: https://github.com/apache/nuttx/pull/20419
On Wed, Sep 30, 2026 at 9:28 AM Alan C. Assis <[email protected]> wrote: > Hi KR, > > Another different topic here: > > Could you please verify this issue that should affect AVR: > > Several open() flags are defined as shifts past bit 15, for example > O_DIRECTORY (1U << 16), O_CLOEXEC (1U << 19) and O_NOFOLLOW (1U << 17). > - Where int is 16 bits, these shifts are undefined. GCC turns every one > of them > into 0. > - open() takes int oflags, so it can't carry those bits anyway. > - The compiler warning never appears, because NuttX includes its headers > with > -isystem, which hides warnings from them. > > The effect. > - opendir() never passed O_DIRECTORY, so opening /proc failed with > ENOENT and ps > broke. > - O_CLOEXEC and O_NOFOLLOW silently did nothing. > - AVR also has a 16-bit int, so it has the same latent bug. > > If this issue exists on AVR, your system probably cannot mount /proc, and > the ps command will not work. > > BR, > > Alan > > On Mon, Sep 28, 2026 at 9:45 AM <[email protected]> wrote: > >> -1 (non-binding) for AVR DA/DB >> >> Fails to compile with: >> >> avr-ld: staging/libsched.a(sem_destroy.o): in function `.L3': >> sem_destroy.c:(.text.nxsem_destroy+0x46): undefined reference to >> `__atomic_load_4' >> >> I tracked this down to a patch series that includes commit 4ca2256a9beef >> (nuttx/atomic: select LIBC_ATOMIC_IRQ for archs without atomic support) >> - this commit did not cover AVR DA/DB. >> >> I prepared a patch and uploaded it to my git repository nuttx.git at >> git.kerogit.eu accessible through HTTP/S. (Trying to prevent bot traffic >> by not posting the URL in machine-readable form.) The relevant branch is >> called avrdx_fix_13.1. The patch is also attached to this message - I >> don't have a GitHub account so, if possible, I would like to ask someone >> to open a PR and merge it to development branch. It's a simple one-liner >> doing the same thing as what the 4ca2256a9beef does, simply adds "select >> LIBC_ATOMIC_IRQ" to Kconfig. (If the vote for RC0 fails, please merge it >> to RC1 as well.) >> >> With the patch, build process completes - for breadxavr:nsh >> configuration: >> >> Register: nsh >> Register: sh >> LD: nuttx >> Memory region Used Size Region Size %age Used >> flash: 56125 B 128 KB 42.82% >> sram: 780 B 16 KB 4.76% >> eeprom: 0 B 512 B 0.00% >> rodata: 602 B 4 KB 14.70% >> >> (Compared to previous version 13.0, the binary size increased by 850 >> bytes. Most of that is caused by changes in fs/inode starting with patch >> e73947e9e so not much can be done to alleviate that - at least not >> easily.) >> >> Other than that, there also seems to be a performance regression >> observed when running a stress test app which is apparently dropping >> bytes from UART (interrupt not serviced in time.) Takes few hours to >> manifest though so I'll try to track that one down for 13.2. >> >> On 2026-09-27 07:20, Alin Jerpelea wrote: >> > Hello all, >> > Apache NuttX 13.1.0 RC0 has been staged under [1] and it's >> > time to vote on accepting it for release. Voting will be open for 72hr. >> > >> > A minimum of 3 binding +1 votes and more binding +1 than binding -1 are >> > required to pass. >> > >> > The Apache requirements for approving a release can be found here [3] >> > "Before voting +1 PMC members are required to download the signed >> > source code package, compile it as provided, and test the resulting >> > executable on their own platform, along with also verifying that the >> > package meets the requirements of the ASF policy on releases." >> > >> > A document to walk through some of this process has been published on >> > our project wiki and can be found here [4]. >> > >> > [ ] +1 accept (indicate what you validated - e.g. performed the non-RM >> > items in [4]) >> > [ ] -1 reject (explanation required) >> > >> > Thank you all, >> > Alin Jerpelea >> > >> > SCM Information: >> > Release tag: nuttx-13.1.0-RC0 >> > Hash for the release nuttx tag: >> > 2b5c0de5e933281c209f954a63b99cf10c132346 >> > Hash for the release nuttx-apps tag: >> > 3c772ea35b9245972e18999828f7b533e6fc57cc >> > >> > [1] https://dist.apache.org/repos/dist/dev/nuttx/13.1.0-RC0/ >> > [2] >> > >> https://raw.githubusercontent.com/apache/nuttx/nuttx-13.1.0-RC0/ReleaseNotes >> > [3] https://www.apache.org/dev/release.html#approving-a-release >> > [4] >> > >> https://cwiki.apache.org/confluence/display/NUTTX/Validating+a+staged+Release >> >
