clang-tidy missing from SDK

[mous16]

Describe the bug
Building core-image-minimal SDK on scarthgap, results in missing clang-tidy executable from SDK, but with broken links to it.

To Reproduce
Steps to reproduce the behavior:

1. Setup minimal poky checkout with meta-clang
2. Add just CLANGSDK = "1" line to local.conf
3. Build image and SDK with bitbake core-image-minimal -c populate_sdk
4. Install generated SDK
5. Verify that no clang-tidy executable is present in SDK:

   $ ls -l $(find . -iname "*clang-tidy*")
   lrwxrwxrwx  ./sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux-gnux32/x86_64-poky-linux-gnux32-clang-tidy -> ../x86_64-poky-linux/x86_64-poky-linux-clang-tidy
   lrwxrwxrwx  ./sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux-musl/x86_64-poky-linux-musl-clang-tidy -> ../x86_64-poky-linux/x86_64-poky-linux-clang-tidy
   lrwxrwxrwx  ./sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux-muslx32/x86_64-poky-linux-muslx32-clang-tidy -> ../x86_64-poky-linux/x86_64-poky-linux-clang-tidy
   lrwxrwxrwx  ./sysroots/x86_64-pokysdk-linux/usr/bin/x86_64-poky-linux/x86_64-poky-linux-clang-tidy -> ../clang-tidy

   But ./sysroots/x86_64-pokysdk-linux/usr/bin/clang-tidy does not exist.

Expected behavior
clang-tidy binary should be included in SDK, as it happens for clang-include-cleaner and clangd.

Additional context
If I add to local.conf

TOOLCHAIN_TARGET_TASK:append = " \
    nativesdk-clang-tidy \
"

the build fails with packaging problem, using ipk:

ERROR: core-image-minimal-1.0-r0 do_populate_sdk: Unable to install packages. Command './poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/recipe-sysroot-native/usr/bin/opkg --volatile-cache -f ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/opkg-sdk-target.conf -t ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/temp/ipktemp/ -o ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/sdk/image/usr/local/oe-sdk-hardcoded-buildpath/sysroots/core2-64-poky-linux  --force_postinstall --prefer-arch-to-version   install nativesdk-clang-tidy packagegroup-core-boot packagegroup-core-standalone-sdk-target run-postinsts target-sdk-provides-dummy' returned 255:
 * opkg_prepare_url_for_install: Couldn't find anything to satisfy 'nativesdk-clang-tidy'.

and using rpm:

ERROR: core-image-minimal-1.0-r0 do_populate_sdk: Could not invoke dnf. Command './poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/recipe-sysroot-native/usr/bin/dnf -v --rpmverbosity=info -y -c ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/sdk/image/usr/local/oe-sdk-hardcoded-buildpath/sysroots/core2-64-poky-linux/etc/dnf/dnf.conf --setopt=reposdir=./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/sdk/image/usr/local/oe-sdk-hardcoded-buildpath/sysroots/core2-64-poky-linux/etc/yum.repos.d --installroot=./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/sdk/image/usr/local/oe-sdk-hardcoded-buildpath/sysroots/core2-64-poky-linux --setopt=logdir=./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/temp --repofrompath=oe-repo,./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/oe-sdk-repo --nogpgcheck install nativesdk-clang-tidy packagegroup-core-boot packagegroup-core-standalone-sdk-target run-postinsts target-sdk-provides-dummy' returned 1:
DNF version: 4.19.0
cachedir: ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/sdk/image/usr/local/oe-sdk-hardcoded-buildpath/sysroots/core2-64-poky-linux/var/cache/dnf
Added oe-repo repo from ./poky/build/tmp/work/qemux86_64-poky-linux/core-image-minimal/1.0/oe-sdk-repo
User-Agent: falling back to 'libdnf': could not detect OS or basearch
repo: using cache for: oe-repo
oe-repo: using metadata from Mon 09 Dec 2024 01:53:27 PM UTC.
Last metadata expiration check: 0:00:01 ago on Mon 09 Dec 2024 02:28:19 PM UTC.
--> Starting dependency resolution
--> Finished dependency resolution
Error:
 Problem: conflicting requests
  - package nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo does not have a compatible architecture
  - nothing provides libLLVM.so.18.1()(64bit) needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides libLLVM.so.18.1(LLVM_18.1)(64bit) needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides libclang-cpp.so.18.1()(64bit) needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides nativesdk-libc6 >= 2.39+git0+dcaf51b41e needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides nativesdk-libgcc1 >= 13.3.0 needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides nativesdk-libstdc++6 >= 13.3.0 needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides nativesdk-clang-libllvm >= 18.1.6 needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
  - nothing provides nativesdk-libclang-cpp18.1 >= 18.1.6 needed by nativesdk-clang-tidy-18.1.6-r0.x86_64_nativesdk from oe-repo
(try to add '--skip-broken' to skip uninstallable packages)

[Falital]

I can verify that the broken link is in the sdk since they are generated in nativesdk-clang packcage to get clang-tidy you have to manually add nativesdk-clang-tidy to your host toolchain.

TOOLCHAIN_HOST_TASK:append = " \ nativesdk-clang-tidy \ "

In your workaround you install it to your target toolchain. In this case you need set it like this for it to work but it is not usefull since you add a target app in a tool expected to be executed by your host.

TOOLCHAIN_TARGET_TASK:append = " \ clang-tidy \ "

The proper fix for this would be to split the packages and only create the symbolic link in each package.