This looks like https://bugs.kde.org/show_bug.cgi?id=434764
iconv_open causes ld.so v2.28+ to use optimised strncmp
Which was recently (but after 3.19.0) fixed by merging this commit:
commit 947388eb043ea1c44b37df94046e1eee790ad776
Author: Mike Crowe <m...@mcrowe.com>
AuthorDate: Mon Sep 9 14:16:16 2019 +0100
Commit: Mark Wielaard <m...@klomp.org>
CommitDate: Sat May 14 00:41:18 2022 +0200
Intercept strncmp for glibc ld.so v2.28+
The C standard claims that all function names that begin with
'str' or 'mem' are reserved, and that language processors (compilers,
valgrind, ...) may assume that such names designate the Standard functions.
If so, then valgrind's interception code is too picky about the context
for re-directing these functions; just use
STRNCMP("*", strncmp)
etc. to re-direct them all.
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