hwcaps search libs removed in recent glibc

[Mathieu Malaterre <malat@debian.org>]

[CC me please]

Hi folks,

It seems glibc 2.37 has removed hwcaps search patches.

% LD_DEBUG=libs LD_LIBRARY_PATH=. /bin/true
   3611433:     find library=libc.so.6 [0]; searching
   3611433:      search path=.          (LD_LIBRARY_PATH)
   3611433:       trying file=./libc.so.6
   3611433:      search cache=/etc/ld.so.cache
   3611433:       trying file=/lib/i386-linux-gnu/libc.so.6
   3611433:
   3611433:
   3611433:     calling init: /lib/ld-linux.so.2
   3611433:
   3611433:
   3611433:     calling init: /lib/i386-linux-gnu/libc.so.6
   3611433:
   3611433:
   3611433:     initialize program: /bin/true
   3611433:
   3611433:
   3611433:     transferring control: /bin/true
   3611433:
   3611433:
   3611433:     calling fini:  [0]
   3611433:
   3611433:
   3611433:     calling fini: /lib/i386-linux-gnu/libc.so.6 [0]
   3611433:
   3611433:
   3611433:     calling fini: /lib/ld-linux.so.2 [0]
   3611433:

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.

Thanks for confirmation !

ref:
* https://sourceware.org/pipermail/libc-help/2023-August/006476.html