Hi Aaron, On Mon, Dec 08, 2025 at 08:48:54PM -0500, Aaron Merey wrote: > Currently we check for openat2 RESOLVE_IN_ROOT support using > AC_LINK_IFELSE. HAVE_OPENAT2_RESOLVE_IN_ROOT is defined when > AC_LINK_IFELSE succeeds. > > It is possible for openat2 and RESOLVE_IN_ROOT to be > present in headers but the kernel does not implement it. In this case > AC_LINK_IFELSE succeeds and HAVE_OPENAT2_RESOLVE_IN_ROOT is defined, > but openat2 calls using RESOLVE_IN_ROOT always fail with ENOSYS for > instance. > > Fix this by using AC_RUN_IFELSE instead of AC_LINK_IFELSE when > determining whether to define HAVE_OPENAT2_RESOLVE_IN_ROOT.
I agree with Arnout in the other thread that this is probably not needed here. There is already fallback code in both link_map and dwfl_segment_report_module there is a check for enosys to then use reguar open. Is that not working as intended? Cheers, Mark
