update-alternatives-clang.sh

#!/bin/sh
# shellcheck shell=sh 

# This code is free for any use by anyone under the terms of
# Creative Commons Attribution-NonCommercial 4.0 International Public License
# See the the file license.txt and https://creativecommons.org
# Jerker Bäck 2021, based on work by Jesse Cooke

# How to use:
# sudo ./update-alternatives-clang.sh 12 120

llvm_update_alternatives() {
    local version=$1
    local priority=$2

    update-alternatives \
        --verbose \
        --install /usr/bin/llvm-config              llvm-config                 /usr/bin/llvm-config-"${version}" "${priority}" \
        --slave /usr/bin/analyze-build              analyze-build               /usr/bin/analyze-build-"${version}" \
        --slave /usr/bin/asan_symbolize             asan_symbolize              /usr/bin/asan_symbolize-"${version}" \
        --slave /usr/bin/bugpoint                   bugpoint                    /usr/bin/bugpoint-"${version}" \
        --slave /usr/bin/c-index-test               c-index-test                /usr/bin/c-index-test-"${version}" \
        --slave /usr/bin/clang                      clang                       /usr/bin/clang-"${version}" \
        --slave /usr/bin/clang++                    clang++                     /usr/bin/clang++-"${version}" \
        --slave /usr/bin/clang-apply-replacements   clang-apply-replacements    /usr/bin/clang-apply-replacements-"${version}" \
        --slave /usr/bin/clang-change-namespace     clang-change-namespace      /usr/bin/clang-change-namespace-"${version}" \
        --slave /usr/bin/clang-check                clang-check                 /usr/bin/clang-check-"${version}" \
        --slave /usr/bin/clang-cl                   clang-cl                    /usr/bin/clang-cl-"${version}" \
        --slave /usr/bin/clang-cpp                  clang-cpp                   /usr/bin/clang-cpp-"${version}" \
        --slave /usr/bin/clangd                     clangd                      /usr/bin/clangd-"${version}" \
        --slave /usr/bin/clang-doc                  clang-doc                   /usr/bin/clang-doc-"${version}" \
        --slave /usr/bin/clang-extdef-mapping       clang-extdef-mapping        /usr/bin/clang-extdef-mapping-"${version}" \
        --slave /usr/bin/clang-format               clang-format                /usr/bin/clang-format-"${version}" \
        --slave /usr/bin/clang-format-diff          clang-format-diff           /usr/bin/clang-format-diff-"${version}" \
        --slave /usr/bin/clang-include-fixer        clang-include-fixer         /usr/bin/clang-include-fixer-"${version}" \
        --slave /usr/bin/clang-move                 clang-move                  /usr/bin/clang-move-"${version}" \
        --slave /usr/bin/clang-nvlink-wrapper       clang-nvlink-wrapper        /usr/bin/clang-nvlink-wrapper-"${version}" \
        --slave /usr/bin/clang-offload-bundler      clang-offload-bundler       /usr/bin/clang-offload-bundler-"${version}" \
        --slave /usr/bin/clang-offload-wrapper      clang-offload-wrapper       /usr/bin/clang-offload-wrapper-"${version}" \
        --slave /usr/bin/clang-query                clang-query                 /usr/bin/clang-query-"${version}" \
        --slave /usr/bin/clang-refactor             clang-refactor              /usr/bin/clang-refactor-"${version}" \
        --slave /usr/bin/clang-rename               clang-rename                /usr/bin/clang-rename-"${version}" \
        --slave /usr/bin/clang-reorder-fields       clang-reorder-fields        /usr/bin/clang-reorder-fields-"${version}" \
        --slave /usr/bin/clang-repl                 clang-repl                  /usr/bin/clang-repl-"${version}" \
        --slave /usr/bin/clang-scan-deps            clang-scan-deps             /usr/bin/clang-scan-deps-"${version}" \
        --slave /usr/bin/clang-tidy                 clang-tidy                  /usr/bin/clang-tidy-"${version}" \
        --slave /usr/bin/clang-tidy-diff.py         clang-tidy-diff.py          /usr/bin/clang-tidy-diff-"${version}".py \
        --slave /usr/bin/count                      count                       /usr/bin/count-"${version}" \
        --slave /usr/bin/diagtool                   diagtool                    /usr/bin/diagtool-"${version}" \
        --slave /usr/bin/dsymutil                   dsymutil                    /usr/bin/dsymutil-"${version}" \
        --slave /usr/bin/FileCheck                  FileCheck                   /usr/bin/FileCheck-"${version}" \
        --slave /usr/bin/find-all-symbols           find-all-symbols            /usr/bin/find-all-symbols-"${version}" \
        --slave /usr/bin/git-clang-format           git-clang-format            /usr/bin/git-clang-format-"${version}" \
        --slave /usr/bin/hmaptool                   hmaptool                    /usr/bin/hmaptool-"${version}" \
        --slave /usr/bin/hwasan_symbolize           hwasan_symbolize            /usr/bin/hwasan_symbolize-"${version}" \
        --slave /usr/bin/intercept-build            intercept-build             /usr/bin/intercept-build-"${version}" \
        --slave /usr/bin/ld.lld                     ld.lld                      /usr/bin/ld.lld-"${version}" \
        --slave /usr/bin/ld64.lld                   ld64.lld                    /usr/bin/ld64.lld-"${version}" \
        --slave /usr/bin/llc                        llc                         /usr/bin/llc-"${version}" \
        --slave /usr/bin/lld                        lld                         /usr/bin/lld-"${version}" \
        --slave /usr/bin/lld-link                   lld-link                    /usr/bin/lld-link-"${version}" \
        --slave /usr/bin/lli                        lli                         /usr/bin/lli-"${version}" \
        --slave /usr/bin/lli-child-target           lli-child-target            /usr/bin/lli-child-target-"${version}" \
        --slave /usr/bin/llvm-addr2line             llvm-addr2line              /usr/bin/llvm-addr2line-"${version}" \
        --slave /usr/bin/llvm-ar                    llvm-ar                     /usr/bin/llvm-ar-"${version}" \
        --slave /usr/bin/llvm-as                    llvm-as                     /usr/bin/llvm-as-"${version}" \
        --slave /usr/bin/llvm-bcanalyzer            llvm-bcanalyzer             /usr/bin/llvm-bcanalyzer-"${version}" \
        --slave /usr/bin/llvm-bitcode-strip         llvm-bitcode-strip          /usr/bin/llvm-bitcode-strip-"${version}" \
        --slave /usr/bin/llvm-cat                   llvm-cat                    /usr/bin/llvm-cat-"${version}" \
        --slave /usr/bin/llvm-cfi-verify            llvm-cfi-verify             /usr/bin/llvm-cfi-verify-"${version}" \
        --slave /usr/bin/llvm-cov                   llvm-cov                    /usr/bin/llvm-cov-"${version}" \
        --slave /usr/bin/llvm-c-test                llvm-c-test                 /usr/bin/llvm-c-test-"${version}" \
        --slave /usr/bin/llvm-cvtres                llvm-cvtres                 /usr/bin/llvm-cvtres-"${version}" \
        --slave /usr/bin/llvm-cxxdump               llvm-cxxdump                /usr/bin/llvm-cxxdump-"${version}" \
        --slave /usr/bin/llvm-cxxfilt               llvm-cxxfilt                /usr/bin/llvm-cxxfilt-"${version}" \
        --slave /usr/bin/llvm-cxxmap                llvm-cxxmap                 /usr/bin/llvm-cxxmap-"${version}" \
        --slave /usr/bin/llvm-debuginfod-find       llvm-debuginfod-find        /usr/bin/llvm-debuginfod-find-"${version}" \
        --slave /usr/bin/llvm-diff                  llvm-diff                   /usr/bin/llvm-diff-"${version}" \
        --slave /usr/bin/llvm-dis                   llvm-dis                    /usr/bin/llvm-dis-"${version}" \
        --slave /usr/bin/llvm-dlltool               llvm-dlltool                /usr/bin/llvm-dlltool-"${version}" \
        --slave /usr/bin/llvm-dwarfdump             llvm-dwarfdump              /usr/bin/llvm-dwarfdump-"${version}" \
        --slave /usr/bin/llvm-dwp                   llvm-dwp                    /usr/bin/llvm-dwp-"${version}" \
        --slave /usr/bin/llvm-exegesis              llvm-exegesis               /usr/bin/llvm-exegesis-"${version}" \
        --slave /usr/bin/llvm-extract               llvm-extract                /usr/bin/llvm-extract-"${version}" \
        --slave /usr/bin/llvm-gsymutil              llvm-gsymutil               /usr/bin/llvm-gsymutil-"${version}" \
        --slave /usr/bin/llvm-ifs                   llvm-ifs                    /usr/bin/llvm-ifs-"${version}" \
        --slave /usr/bin/llvm-install-name-tool     llvm-install-name-tool      /usr/bin/llvm-install-name-tool-"${version}" \
        --slave /usr/bin/llvm-jitlink               llvm-jitlink                /usr/bin/llvm-jitlink-"${version}" \
        --slave /usr/bin/llvm-jitlink-executor      llvm-jitlink-executor       /usr/bin/llvm-jitlink-executor-"${version}" \
        --slave /usr/bin/llvm-lib                   llvm-lib                    /usr/bin/llvm-lib-"${version}" \
        --slave /usr/bin/llvm-libtool-darwin        llvm-libtool-darwin         /usr/bin/llvm-libtool-darwin-"${version}" \
        --slave /usr/bin/llvm-link                  llvm-link                   /usr/bin/llvm-link-"${version}" \
        --slave /usr/bin/llvm-lipo                  llvm-lipo                   /usr/bin/llvm-lipo-"${version}" \
        --slave /usr/bin/llvm-lto                   llvm-lto                    /usr/bin/llvm-lto-"${version}" \
        --slave /usr/bin/llvm-lto2                  llvm-lto2                   /usr/bin/llvm-lto2-"${version}" \
        --slave /usr/bin/llvm-mc                    llvm-mc                     /usr/bin/llvm-mc-"${version}" \
        --slave /usr/bin/llvm-mca                   llvm-mca                    /usr/bin/llvm-mca-"${version}" \
        --slave /usr/bin/llvm-ml                    llvm-ml                     /usr/bin/llvm-ml-"${version}" \
        --slave /usr/bin/llvm-modextract            llvm-modextract             /usr/bin/llvm-modextract-"${version}" \
        --slave /usr/bin/llvm-mt                    llvm-mt                     /usr/bin/llvm-mt-"${version}" \
        --slave /usr/bin/llvm-nm                    llvm-nm                     /usr/bin/llvm-nm-"${version}" \
        --slave /usr/bin/llvm-objcopy               llvm-objcopy                /usr/bin/llvm-objcopy-"${version}" \
        --slave /usr/bin/llvm-objdump               llvm-objdump                /usr/bin/llvm-objdump-"${version}" \
        --slave /usr/bin/llvm-opt-report            llvm-opt-report             /usr/bin/llvm-opt-report-"${version}" \
        --slave /usr/bin/llvm-otool                 llvm-otool                  /usr/bin/llvm-otool-"${version}" \
        --slave /usr/bin/llvm-pdbutil               llvm-pdbutil                /usr/bin/llvm-pdbutil-"${version}" \
        --slave /usr/bin/llvm-PerfectShuffle        llvm-PerfectShuffle         /usr/bin/llvm-PerfectShuffle-"${version}" \
        --slave /usr/bin/llvm-profdata              llvm-profdata               /usr/bin/llvm-profdata-"${version}" \
        --slave /usr/bin/llvm-profgen               llvm-profgen                /usr/bin/llvm-profgen-"${version}" \
        --slave /usr/bin/llvm-ranlib                llvm-ranlib                 /usr/bin/llvm-ranlib-"${version}" \
        --slave /usr/bin/llvm-rc                    llvm-rc                     /usr/bin/llvm-rc-"${version}" \
        --slave /usr/bin/llvm-readelf               llvm-readelf                /usr/bin/llvm-readelf-"${version}" \
        --slave /usr/bin/llvm-readobj               llvm-readobj                /usr/bin/llvm-readobj-"${version}" \
        --slave /usr/bin/llvm-reduce                llvm-reduce                 /usr/bin/llvm-reduce-"${version}" \
        --slave /usr/bin/llvm-rtdyld                llvm-rtdyld                 /usr/bin/llvm-rtdyld-"${version}" \
        --slave /usr/bin/llvm-sim                   llvm-sim                    /usr/bin/llvm-sim-"${version}" \
        --slave /usr/bin/llvm-size                  llvm-size                   /usr/bin/llvm-size-"${version}" \
        --slave /usr/bin/llvm-split                 llvm-split                  /usr/bin/llvm-split-"${version}" \
        --slave /usr/bin/llvm-stress                llvm-stress                 /usr/bin/llvm-stress-"${version}" \
        --slave /usr/bin/llvm-strings               llvm-strings                /usr/bin/llvm-strings-"${version}" \
        --slave /usr/bin/llvm-strip                 llvm-strip                  /usr/bin/llvm-strip-"${version}" \
        --slave /usr/bin/llvm-symbolizer            llvm-symbolizer             /usr/bin/llvm-symbolizer-"${version}" \
        --slave /usr/bin/llvm-tapi-diff             llvm-tapi-diff              /usr/bin/llvm-tapi-diff-"${version}" \
        --slave /usr/bin/llvm-tblgen                llvm-tblgen                 /usr/bin/llvm-tblgen-"${version}" \
        --slave /usr/bin/llvm-tli-checker           llvm-tli-checker            /usr/bin/llvm-tli-checker-"${version}" \
        --slave /usr/bin/llvm-undname               llvm-undname                /usr/bin/llvm-undname-"${version}" \
        --slave /usr/bin/llvm-windres               llvm-windres                /usr/bin/llvm-windres-"${version}" \
        --slave /usr/bin/llvm-xray                  llvm-xray                   /usr/bin/llvm-xray-"${version}" \
        --slave /usr/bin/modularize                 modularize                  /usr/bin/modularize-"${version}" \
        --slave /usr/bin/not                        not                         /usr/bin/not-"${version}" \
        --slave /usr/bin/obj2yaml                   obj2yaml                    /usr/bin/obj2yaml-"${version}" \
        --slave /usr/bin/opt                        opt                         /usr/bin/opt-"${version}" \
        --slave /usr/bin/pp-trace                   pp-trace                    /usr/bin/pp-trace-"${version}" \
        --slave /usr/bin/run-clang-tidy             run-clang-tidy              /usr/bin/run-clang-tidy-"${version}" \
        --slave /usr/bin/run-clang-tidy.py          run-clang-tidy.py           /usr/bin/run-clang-tidy-"${version}".py  \
        --slave /usr/bin/sancov                     sancov                      /usr/bin/sancov-"${version}" \
        --slave /usr/bin/sanstats                   sanstats                    /usr/bin/sanstats-"${version}" \
        --slave /usr/bin/scan-build                 scan-build                  /usr/bin/scan-build-"${version}" \
        --slave /usr/bin/scan-build-py              scan-build-py               /usr/bin/scan-build-py-"${version}" \
        --slave /usr/bin/scan-view                  scan-view                   /usr/bin/scan-view-"${version}" \
        --slave /usr/bin/split-file                 split-file                  /usr/bin/split-file-"${version}" \
        --slave /usr/bin/verify-uselistorder        verify-uselistorder         /usr/bin/verify-uselistorder-"${version}" \
        --slave /usr/bin/wasm-ld                    wasm-ld                     /usr/bin/wasm-ld-"${version}" \
        --slave /usr/bin/yaml2obj                   yaml2obj                    /usr/bin/yaml2obj-"${version}" \
        --slave /usr/bin/yaml-bench                 yaml-bench                  /usr/bin/yaml-bench-"${version}"

    update-alternatives --config llvm-config
    unset version priority
}

# run the llvm_update_alternatives function with two parameters supplied frpm the console
llvm_update_alternatives "$1" "$2"

This will work with a full installation of LLVM 14 on WSL ubuntu 20.04