Hi, On 2023-09-01 09:14, Mathieu Malaterre wrote: > Source: glibc > Version: 2.37-1 > > Previously defined hwcap search paths have been changed. Those > specified in `man 8 ld.so` are no longer accurate (bug #1050930).
[snip] Yes, the old AT_HWCAP mechanism has been deprecated in glibc 2.33 in favor of the glibc-hwcaps mechanism, and removed in glibc 2.37. Instead of relying on a huge number of CPU feature combinations, the new mechanism is based on architecture baseline level. For instance for amd64 we have x86-64-v1 to x86-64-v4 levels defined directly in the ELF x86-64-ABI psABI [1]. The supported directories can be queried by running ld.so --help That indeed means that the ld.so manpage need to be updated, thanks for filling the bug against manpages-dev. > Typical output on sid/i386: > [...] > Shared library search path: > (libraries located via /etc/ld.so.cache) > /lib/i386-linux-gnu (system search path) > /usr/lib/i386-linux-gnu (system search path) > /lib (system search path) > /usr/lib (system search path) > > No subdirectories of glibc-hwcaps directories are searched. > [...] Indeed no level has been yet defined for i386 and I am afraid nobody is really interested in doing so. > If I understand correctly, this render the following .so file obsolete > (unused): > > % file /usr/lib/i386-linux-gnu/i686/sse2/libx264.so.164 > /usr/lib/i386-linux-gnu/i686/sse2/libx264.so.164: ELF 32-bit LSB > shared object, Intel 80386, version 1 (SYSV), dynamically linked, > BuildID[sha1]=e66974d10aef77af7ed504266cde974d103484d6, stripped > > Possibly other packages might be impacted. > > I suspect the best upgrade path is simply to document the old hwcap > search path have been removed, and Debian package(s) should not rely > on them anymore (lintian warning?). This is already documented in the upstream NEWS.gz, but it might warrant an additional entry in NEWS.Debian.gz. The lintian warning might be a good idea depending how widely this is used in the archive. I'll investigate and report back. Regards Aurelien [1] https://gitlab.com/x86-psABIs/x86-64-ABI -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://aurel32.net