WIP: add zephyr posix aep choice rev 2 #94876
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August 31, 2025 08:50
pwd.c and grp.c both had incorrect preprocessor guards around the stubs that they were implementing. Functions were surrounded by ```cpp .. ``` Which is not at all accurate, since that subprofiling option group is `(CONFIG_)POSIX_SYSTEM_DATABASE_R`.D Remove the guards, since they are invalid anyway, and at most an application will link properly. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Rather than duplicating limit logic in several places, de-duplicate it and centralize preprocessor checks in posix_limits.h . Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Newlib does not seem to define a number of mandatory POSIX limits (e.g. minimum values). Include Zephyr's POSIX definitions in an override of Newlib's limits.h (when the appropriate application conformance macro is provided). Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Use the realtime clock, since that is always guaranteed to be available with _POSIX_TIMERS. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Define _POSIX_TIMERS=200809L when so configured. This change is required to ensure that Newlib provides the necessary POSIX timer API definitions in toolchain headers. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
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August 31, 2025 09:29
To avoid conflicts between the C library's time.h and posix time.h, use an "override" header when necessary for C libraries that do not themselves provide POSIX definitions in time.h . This will allow non-POSIX C libraries to take advantage of Zephyr's implementation.
The eventfd configuration does not need to be so deeply nested within POSIX since it does not depend on POSIX completely. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Separate the POSIX implementation into two categories: - Extensions to ISO C - System Interfaces The first category include standalone functions that generally do not require OS support or depend on any other features within the POSIX specification. The Option Groups that comprise this category include - POSIX_C_LIB_EXT: e.g. strnlen(), fnmatch() - POSIX_C_LANG_SUPPORT_R: e.g. gmtime_r(), strtok_r() The second category includes the majority of other POSIX Option Groups that do require OS support. The latter group may also be categorized generally as being NATIVE_LIBC_INCOMPATIBLE, although that might eventually become more granular. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Add a custom Zephyr POSIX subprofile specifically for enabling the default features that Zephyr requires as per the coding guidelines. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Default POSIX_AEP_CHOICE to POSIX_AEP_CHOICE_ZEPHYR Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
Add zephyr-keep-sorted-start and zephyr-keep-sorted-stop comments. Signed-off-by: Chris Friedt <cfriedt@tenstorrent.com>
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moved back to #88547 |
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This is just a work in progress to see if the POSIX AEP PR will pass with additional changes to time.h