On Sun, Apr 20, 2025 at 09:24:43PM +0200, Stanislav Brabec wrote:
> Static build of btrfs-progs fails with util-linux-2.41 with a simple
> problem:
> Symbol parse_range becomes visible in libblkid.a, breaking parse-utils.c in
> btrfs-progs, using the same symbol.
>
> The question is:
> Should be this fixed by util-linux by prefixing of ul_ to all symbols that
> are not declared as static?
I think the ul_ prefix should be used for all generic names like
parse_range(). I'm not sure if I want to use it strictly for all
functions, as the set of functions is large and such conflicts are
very rare.
ChatGPT has an interesting suggestion: add the prefix to the .a
library using "objcopy --redefine-syms" for all non-API and non-static
functions.
#!/bin/bash
PREFIX=foo_
# Extract all global (non-static) function symbols from the .a file
nm -g --defined-only libmylib.a | awk '{print $3}' | grep -v "^$PREFIX" | sort -u > tmp.syms
# Generate rename list: <old> <new>
awk -v pfx="$PREFIX" '{print $1 " " pfx $1}' tmp.syms > rename.syms
# Apply symbol renaming
objcopy --redefine-syms=rename.syms libmylib.a libmylib_prefixed.a
Maybe it's elegant way to go. Not sure, not tested :-)
Karel
--
Karel Zak <kzak@xxxxxxxxxx>
http://karelzak.blogspot.com
