SPECS: linux-tools: fix build failure on RISC-V due to arch-specific hardware tracing.

[Leetfs]

The current perf build system hardcodes architecture-specific hardware tracing objects (e.g., intel-pt.o, arm-spe.o) into the generic perf-util-y list. This leads to linker failures on architectures like RISC-V where these objects are not generated.

This patch decouples these drivers from the generic build process:

1. Makefile.config: Only export CONFIG_PERF_XYZ (e.g., CONFIG_PERF_INTEL_PT) feature flags for their respective supported architectures.
2. util/Build: Link hardware tracing objects conditionally based on these exported feature flags.
3. util/auxtrace.c: Implement __weak stub functions returning -ENOSYS to ensure successful linking on all architectures.

Additionally, resolve GCC 14 build errors by adding explicit type casting for string functions to comply with stricter pointer safety and syntax requirements.

[Leetfs]

Build log:

[ 1742s] Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
[ 1742s] Supplements: (linux-tools = 7.0.5-17.1.or and langpacks-pt)
[ 1742s] Processing files: linux-tools-langpack-zh-7.0.5-17.1.or.noarch
[ 1742s] Provides: linux-tools-langpack-zh = 7.0.5-17.1.or
[ 1742s] Requires(rpmlib): rpmlib(CompressedFileNames) <= 3.0.4-1 rpmlib(FileDigests) <= 4.6.0-1 rpmlib(PayloadFilesHavePrefix) <= 4.0-1
[ 1742s] Supplements: (linux-tools = 7.0.5-17.1.or and langpacks-zh)
[ 1742s] Checking for unpackaged file(s): /usr/lib/rpm/check-files /home/abuild/rpmbuild/BUILD/linux-tools-7.0.5-build/BUILDROOT
[ 1754s] Wrote: /home/abuild/rpmbuild/SRPMS/linux-tools-7.0.5-17.1.or.src.rpm
[ 1754s] Wrote: /home/abuild/rpmbuild/RPMS/riscv64/linux-tools-devel-7.0.5-17.1.or.riscv64.rpm
[ 1754s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-ka-7.0.5-17.1.or.noarch.rpm
[ 1754s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-zh-7.0.5-17.1.or.noarch.rpm
[ 1754s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-de-7.0.5-17.1.or.noarch.rpm
[ 1755s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-it-7.0.5-17.1.or.noarch.rpm
[ 1755s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-pt-7.0.5-17.1.or.noarch.rpm
[ 1755s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-fr-7.0.5-17.1.or.noarch.rpm
[ 1755s] Wrote: /home/abuild/rpmbuild/RPMS/noarch/linux-tools-langpack-cs-7.0.5-17.1.or.noarch.rpm
[ 1755s] Wrote: /home/abuild/rpmbuild/RPMS/riscv64/linux-tools-7.0.5-17.1.or.riscv64.rpm
[ 1761s] Wrote: /home/abuild/rpmbuild/RPMS/riscv64/perf-7.0.5-17.1.or.riscv64.rpm
[ 1761s] Executing(rmbuild): /usr/bin/bash -e /var/tmp/rpm-tmp.nT4RTz
[ 1761s] + umask 022
[ 1761s] + cd /home/abuild/rpmbuild/BUILD/linux-tools-7.0.5-build
[ 1761s] + test -d /home/abuild/rpmbuild/BUILD/linux-tools-7.0.5-build
[ 1761s] + /usr/bin/chmod -Rf a+rX,u+w,g-w,o-w /home/abuild/rpmbuild/BUILD/linux-tools-7.0.5-build
[ 1762s] + rm -rf /home/abuild/rpmbuild/BUILD/linux-tools-7.0.5-build
[ 1769s] + RPM_EC=0
[ 1769s] ++ jobs -p
[ 1769s] + exit 0
[ 1770s] ... checking for files with abuild user/group
[ 1770s] Warning: mkbaselibs missing in build root, skipping baselibs
[ 1770s] 
[ 1770s] obsworker-sg2044-0316-1 finished "build linux-tools.spec" at Wed May 13 00:59:37 UTC 2026.
[ 1770s] 

[Z572]

You can try sending it upstream.