C23-compatible release

[shunghsiyu]

Similar to libbpf/libbpf#941, the latest version of bpftool have problem when compiled with GCC 15 and glibc 2.43. If CFLAGS were not set, bpftool will fail to build because -Werror is set by default in libbpf's Makefile.

[   20s] gcc -I. -I../include -I../include/uapi -g -O2 -Werror -Wall -std=gnu89 -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Wno-unknown-warning-option -Wno-format-overflow   -c libbpf.c -o /home/abuild/rpmbuild/BUILD/bpftool-7.6.0-build/bpftool-libbpf-v7.6.0-sources/src/bootstrap/libbpf/staticobjs/libbpf.o
[   20s] libbpf.c: In function ‘kallsyms_cb’:
[   20s] libbpf.c:8186:13: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
[   20s]  8186 |         res = strstr(sym_name, ".llvm.");
[   20s]       |             ^
[   20s] libbpf.c: In function ‘avail_kallsyms_cb’:
[   20s] libbpf.c:11491:31: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
[   20s] 11491 |                 if (!(sym_sfx = strstr(sym_name, ".llvm.")))
[   20s]       |                               ^
[   20s] libbpf.c: In function ‘resolve_full_path’:
[   20s] libbpf.c:12079:35: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
[   20s] 12079 |                         next_path = strchr(s, ':');
[   20s]       |                                   ^

As such, I'd like to request a release with libbpf/libbpf@fda2bfc included so we have a C23-compatible bpftool release.

[qmonnet]

Hi Shung-Hsi, thanks for the report!

Bpftool releases are aligned with libbpf's, so once the next libbpf release is out with the patch you mentioned, I'll tag a new one for bpftool using the new libbpf (can take me a few days). Does this work for you?

[shunghsiyu]

Works for me, thanks!