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junkdog/update-alternatives-clang.sh

Created November 18, 2017 20:29
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update-alternatives-clang.sh
#!/usr/bin/env bash
# --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\
function register_clang_version {
local version=$1
local priority=$2
update-alternatives \
--install /usr/bin/llvm-config llvm-config /usr/bin/llvm-config-${version} ${priority} \
--slave /usr/bin/llvm-ar llvm-ar /usr/bin/llvm-ar-${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-cov llvm-cov /usr/bin/llvm-cov-${version} \
--slave /usr/bin/llvm-diff llvm-diff /usr/bin/llvm-diff-${version} \
--slave /usr/bin/llvm-dis llvm-dis /usr/bin/llvm-dis-${version} \
--slave /usr/bin/llvm-dwarfdump llvm-dwarfdump /usr/bin/llvm-dwarfdump-${version} \
--slave /usr/bin/llvm-extract llvm-extract /usr/bin/llvm-extract-${version} \
--slave /usr/bin/llvm-link llvm-link /usr/bin/llvm-link-${version} \
--slave /usr/bin/llvm-mc llvm-mc /usr/bin/llvm-mc-${version} \
--slave /usr/bin/llvm-mcmarkup llvm-mcmarkup /usr/bin/llvm-mcmarkup-${version} \
--slave /usr/bin/llvm-nm llvm-nm /usr/bin/llvm-nm-${version} \
--slave /usr/bin/llvm-objdump llvm-objdump /usr/bin/llvm-objdump-${version} \
--slave /usr/bin/llvm-ranlib llvm-ranlib /usr/bin/llvm-ranlib-${version} \
--slave /usr/bin/llvm-readobj llvm-readobj /usr/bin/llvm-readobj-${version} \
--slave /usr/bin/llvm-rtdyld llvm-rtdyld /usr/bin/llvm-rtdyld-${version} \
--slave /usr/bin/llvm-size llvm-size /usr/bin/llvm-size-${version} \
--slave /usr/bin/llvm-stress llvm-stress /usr/bin/llvm-stress-${version} \
--slave /usr/bin/llvm-symbolizer llvm-symbolizer /usr/bin/llvm-symbolizer-${version} \
--slave /usr/bin/llvm-tblgen llvm-tblgen /usr/bin/llvm-tblgen-${version}
update-alternatives \
--install /usr/bin/clang clang /usr/bin/clang-${version} ${priority} \
--slave /usr/bin/clang++ clang++ /usr/bin/clang++-${version} \
--slave /usr/bin/asan_symbolize asan_symbolize /usr/bin/asan_symbolize-${version} \
--slave /usr/bin/c-index-test c-index-test /usr/bin/c-index-test-${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-${version} \
--slave /usr/bin/clang-format clang-format /usr/bin/clang-format-${version} \
--slave /usr/bin/clang-format-diff clang-format-diff /usr/bin/clang-format-diff-${version} \
--slave /usr/bin/clang-import-test clang-import-test /usr/bin/clang-import-test-${version} \
--slave /usr/bin/clang-include-fixer clang-include-fixer /usr/bin/clang-include-fixer-${version} \
--slave /usr/bin/clang-offload-bundler clang-offload-bundler /usr/bin/clang-offload-bundler-${version} \
--slave /usr/bin/clang-query clang-query /usr/bin/clang-query-${version} \
--slave /usr/bin/clang-rename clang-rename /usr/bin/clang-rename-${version} \
--slave /usr/bin/clang-reorder-fields clang-reorder-fields /usr/bin/clang-reorder-fields-${version} \
--slave /usr/bin/clang-tidy clang-tidy /usr/bin/clang-tidy-${version} \
--slave /usr/bin/lldb lldb /usr/bin/lldb-${version} \
--slave /usr/bin/lldb-server lldb-server /usr/bin/lldb-server-${version}
}
register_clang_version $1 $2
@computerjohney
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Yes, thanks, finally got llvm/clang toolchain versions on ubuntu

@bheu
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bheu commented Nov 28, 2020

Thanks

@ricab
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ricab commented May 18, 2021

Very useful, thanks. There's one entry that could perhaps be added:

[...]
--slave   /usr/bin/git-clang-format      git-clang-format      /usr/bin/git-clang-format-${version} \
[...]

@kevinkreiser
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ditto what others have said, thanks for posting!

@StatusCode404
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For building the linux kernel on a distro like Ubuntu 18.04+, substituting all GNU utils, compilers, and linker and allowing for thin LTO; the above will NOT work and fail.

This is how I got it to work...

#!/usr/bin/env bash'

#     --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

function register_clang_version {
    local version=$1
    local priority=$2

    update-alternatives \
        --verbose \
        --install /usr/bin/llvm-config       llvm-config      /usr/bin/llvm-config-${version} ${priority} \
        --slave   /usr/bin/llvm-ar           llvm-ar          /usr/bin/llvm-ar-${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-cov          llvm-cov         /usr/bin/llvm-cov-${version} \
        --slave   /usr/bin/llvm-diff         llvm-diff        /usr/bin/llvm-diff-${version} \
        --slave   /usr/bin/llvm-dis          llvm-dis         /usr/bin/llvm-dis-${version} \
        --slave   /usr/bin/llvm-dwarfdump    llvm-dwarfdump   /usr/bin/llvm-dwarfdump-${version} \
        --slave   /usr/bin/llvm-extract      llvm-extract     /usr/bin/llvm-extract-${version} \
        --slave   /usr/bin/llvm-link         llvm-link        /usr/bin/llvm-link-${version} \
        --slave   /usr/bin/llvm-mc           llvm-mc          /usr/bin/llvm-mc-${version} \
        --slave   /usr/bin/llvm-nm           llvm-nm          /usr/bin/llvm-nm-${version} \
        --slave   /usr/bin/llvm-objdump      llvm-objdump     /usr/bin/llvm-objdump-${version} \
        --slave   /usr/bin/llvm-ranlib       llvm-ranlib      /usr/bin/llvm-ranlib-${version} \
        --slave   /usr/bin/llvm-readobj      llvm-readobj     /usr/bin/llvm-readobj-${version} \
        --slave   /usr/bin/llvm-rtdyld       llvm-rtdyld      /usr/bin/llvm-rtdyld-${version} \
        --slave   /usr/bin/llvm-size         llvm-size        /usr/bin/llvm-size-${version} \
        --slave   /usr/bin/llvm-stress       llvm-stress      /usr/bin/llvm-stress-${version} \
        --slave   /usr/bin/llvm-symbolizer   llvm-symbolizer  /usr/bin/llvm-symbolizer-${version} \
        --slave   /usr/bin/llvm-tblgen       llvm-tblgen      /usr/bin/llvm-tblgen-${version} \
        --slave   /usr/bin/llvm-objcopy      llvm-objcopy     /usr/bin/llvm-objcopy-${version} \
        --slave   /usr/bin/llvm-strip	     llvm-strip       /usr/bin/llvm-strip-${version}

    update-alternatives \
        --verbose \
        --install /usr/bin/clang                 clang                 /usr/bin/clang-${version} ${priority} \
        --slave   /usr/bin/clang++               clang++               /usr/bin/clang++-${version}  \
        --slave   /usr/bin/asan_symbolize        asan_symbolize        /usr/bin/asan_symbolize-${version} \
        --slave   /usr/bin/clang-cpp             clang-cpp             /usr/bin/clang-cpp-${version} \
        --slave   /usr/bin/ld.lld		 ld.lld		       /usr/bin/ld.lld-${version}
}

register_clang_version $1 $2

The above works with clang-12, llvm-12, and ld.lld-12
And will successfully build the Linux kernel even with thin LTO.

There are additions to the OP's list which are:

1. llvm-objcopy
2. llvm-strip
3. ld.lld

The rest where superfluous and deleted.

@tyler274
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tyler274 commented Sep 29, 2021 •
edited
Loading

Those shims aren't superfluous at all, you probably want a debugger and formatter...

#!/usr/bin/env bash

#     --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

function register_clang_version {
    local version=$1
    local priority=$2

    update-alternatives \
        --verbose \
        --install /usr/bin/llvm-config       llvm-config      /usr/bin/llvm-config-${version} ${priority} \
        --slave   /usr/bin/llvm-ar           llvm-ar          /usr/bin/llvm-ar-${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-cov          llvm-cov         /usr/bin/llvm-cov-${version} \
        --slave   /usr/bin/llvm-diff         llvm-diff        /usr/bin/llvm-diff-${version} \
        --slave   /usr/bin/llvm-dis          llvm-dis         /usr/bin/llvm-dis-${version} \
        --slave   /usr/bin/llvm-dwarfdump    llvm-dwarfdump   /usr/bin/llvm-dwarfdump-${version} \
        --slave   /usr/bin/llvm-extract      llvm-extract     /usr/bin/llvm-extract-${version} \
        --slave   /usr/bin/llvm-link         llvm-link        /usr/bin/llvm-link-${version} \
        --slave   /usr/bin/llvm-mc           llvm-mc          /usr/bin/llvm-mc-${version} \
        --slave   /usr/bin/llvm-nm           llvm-nm          /usr/bin/llvm-nm-${version} \
        --slave   /usr/bin/llvm-objdump      llvm-objdump     /usr/bin/llvm-objdump-${version} \
        --slave   /usr/bin/llvm-ranlib       llvm-ranlib      /usr/bin/llvm-ranlib-${version} \
        --slave   /usr/bin/llvm-readobj      llvm-readobj     /usr/bin/llvm-readobj-${version} \
        --slave   /usr/bin/llvm-rtdyld       llvm-rtdyld      /usr/bin/llvm-rtdyld-${version} \
        --slave   /usr/bin/llvm-size         llvm-size        /usr/bin/llvm-size-${version} \
        --slave   /usr/bin/llvm-stress       llvm-stress      /usr/bin/llvm-stress-${version} \
        --slave   /usr/bin/llvm-symbolizer   llvm-symbolizer  /usr/bin/llvm-symbolizer-${version} \
        --slave   /usr/bin/llvm-tblgen       llvm-tblgen      /usr/bin/llvm-tblgen-${version} \
        --slave   /usr/bin/llvm-objcopy      llvm-objcopy     /usr/bin/llvm-objcopy-${version} \
        --slave   /usr/bin/llvm-strip	     llvm-strip       /usr/bin/llvm-strip-${version}

    update-alternatives \
        --verbose \
        --install /usr/bin/clang                 clang                 /usr/bin/clang-${version} ${priority} \
        --slave   /usr/bin/clang++               clang++               /usr/bin/clang++-${version}  \
        --slave   /usr/bin/asan_symbolize        asan_symbolize        /usr/bin/asan_symbolize-${version} \
        --slave   /usr/bin/clang-cpp             clang-cpp             /usr/bin/clang-cpp-${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/ld.lld		         ld.lld		           /usr/bin/ld.lld-${version} \
        --slave   /usr/bin/lld		             lld	               /usr/bin/lld-${version} \
        --slave   /usr/bin/lld-link		         lld-link	           /usr/bin/lld-link-${version} \
        --slave   /usr/bin/clang-format          clang-format          /usr/bin/clang-format-${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-offload-bundler clang-offload-bundler /usr/bin/clang-offload-bundler-${version} \
        --slave   /usr/bin/clang-query           clang-query           /usr/bin/clang-query-${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-tidy            clang-tidy            /usr/bin/clang-tidy-${version} \
        --slave   /usr/bin/lldb                  lldb                  /usr/bin/lldb-${version} \
        --slave   /usr/bin/lldb-server           lldb-server           /usr/bin/lldb-server-${version}
}

register_clang_version $1 $2

@mnesarco
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[2022-09-20] Added the clang language server: clangd

#!/usr/bin/env bash

#     --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

function register_clang_version {
    local version=$1
    local priority=$2

    update-alternatives \
        --verbose \
        --install /usr/bin/llvm-config       llvm-config      /usr/bin/llvm-config-${version} ${priority} \
        --slave   /usr/bin/llvm-ar           llvm-ar          /usr/bin/llvm-ar-${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-cov          llvm-cov         /usr/bin/llvm-cov-${version} \
        --slave   /usr/bin/llvm-diff         llvm-diff        /usr/bin/llvm-diff-${version} \
        --slave   /usr/bin/llvm-dis          llvm-dis         /usr/bin/llvm-dis-${version} \
        --slave   /usr/bin/llvm-dwarfdump    llvm-dwarfdump   /usr/bin/llvm-dwarfdump-${version} \
        --slave   /usr/bin/llvm-extract      llvm-extract     /usr/bin/llvm-extract-${version} \
        --slave   /usr/bin/llvm-link         llvm-link        /usr/bin/llvm-link-${version} \
        --slave   /usr/bin/llvm-mc           llvm-mc          /usr/bin/llvm-mc-${version} \
        --slave   /usr/bin/llvm-nm           llvm-nm          /usr/bin/llvm-nm-${version} \
        --slave   /usr/bin/llvm-objdump      llvm-objdump     /usr/bin/llvm-objdump-${version} \
        --slave   /usr/bin/llvm-ranlib       llvm-ranlib      /usr/bin/llvm-ranlib-${version} \
        --slave   /usr/bin/llvm-readobj      llvm-readobj     /usr/bin/llvm-readobj-${version} \
        --slave   /usr/bin/llvm-rtdyld       llvm-rtdyld      /usr/bin/llvm-rtdyld-${version} \
        --slave   /usr/bin/llvm-size         llvm-size        /usr/bin/llvm-size-${version} \
        --slave   /usr/bin/llvm-stress       llvm-stress      /usr/bin/llvm-stress-${version} \
        --slave   /usr/bin/llvm-symbolizer   llvm-symbolizer  /usr/bin/llvm-symbolizer-${version} \
        --slave   /usr/bin/llvm-tblgen       llvm-tblgen      /usr/bin/llvm-tblgen-${version} \
        --slave   /usr/bin/llvm-objcopy      llvm-objcopy     /usr/bin/llvm-objcopy-${version} \
        --slave   /usr/bin/llvm-strip        llvm-strip       /usr/bin/llvm-strip-${version}

    update-alternatives \
        --verbose \
        --install /usr/bin/clang                 clang                 /usr/bin/clang-${version} ${priority} \
        --slave   /usr/bin/clang++               clang++               /usr/bin/clang++-${version}  \
        --slave   /usr/bin/asan_symbolize        asan_symbolize        /usr/bin/asan_symbolize-${version} \
        --slave   /usr/bin/clang-cpp             clang-cpp             /usr/bin/clang-cpp-${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/ld.lld                ld.lld                /usr/bin/ld.lld-${version} \
        --slave   /usr/bin/lld                   lld                   /usr/bin/lld-${version} \
        --slave   /usr/bin/lld-link              lld-link              /usr/bin/lld-link-${version} \
        --slave   /usr/bin/clang-format          clang-format          /usr/bin/clang-format-${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-offload-bundler clang-offload-bundler /usr/bin/clang-offload-bundler-${version} \
        --slave   /usr/bin/clang-query           clang-query           /usr/bin/clang-query-${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-tidy            clang-tidy            /usr/bin/clang-tidy-${version} \
        --slave   /usr/bin/lldb                  lldb                  /usr/bin/lldb-${version} \
        --slave   /usr/bin/lldb-server           lldb-server           /usr/bin/lldb-server-${version} \
        --slave   /usr/bin/clangd                clangd                /usr/bin/clangd-${version}
}

register_clang_version $1 $2

@ppigazzini
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ppigazzini commented Oct 14, 2022 •
edited
Loading

Thank you. Compact and generic version, with all the files "/usr/bin/*-20" installed by clang 20 on Ubuntu/Debian (https://apt.llvm.org/)

#!/bin/bash
# 241229
# add clang ${version} to Ubuntu

update_alternatives() {
    local version=${1}
    local priority=${2}
    local master=${3}
    local slaves=${4}
    local path=${5}
    local cmdln

    cmdln="--verbose --install ${path}${master} ${master} ${path}${master}-${version} ${priority}"
    for slave in ${slaves}; do
        cmdln="${cmdln} --slave ${path}${slave} ${slave} ${path}${slave}-${version}"
    done
    sudo update-alternatives ${cmdln}
}


if [[ ${#} -ne 2 ]]; then
    echo usage: "${0}" clang_version priority
    exit 1
fi

version=${1}
priority=${2}
path="/usr/bin/"

sudo apt update

# download and launch the setup script
curl -sSL https://apt.llvm.org/llvm.sh | sudo bash -s ${version}
# curl -sSL https://apt.llvm.org/llvm.sh | sudo bash -s ${version} all

# configure with update-alternatives
master="llvm-config"
# up to v17
slaves="llvm-addr2line llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-cat llvm-cfi-verify llvm-cov llvm-c-test llvm-cvtres llvm-cxxdump llvm-cxxfilt llvm-cxxmap llvm-debuginfo-analyzer llvm-debuginfod llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy llvm-objdump llvm-opt-report llvm-otool llvm-pdbutil llvm-PerfectShuffle llvm-profdata llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj llvm-reduce llvm-remark-size-diff llvm-remarkutil llvm-rtdyld llvm-sim llvm-size llvm-split llvm-stress llvm-strings llvm-strip llvm-symbolizer llvm-tapi-diff llvm-tblgen llvm-tli-checker llvm-undname llvm-windres llvm-xray"
# v18 and v19
slaves="llvm-addr2line llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-cat llvm-cfi-verify llvm-cov llvm-c-test llvm-cvtres llvm-cxxdump llvm-cxxfilt llvm-cxxmap llvm-debuginfo-analyzer llvm-debuginfod llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy llvm-objdump llvm-opt-report llvm-otool llvm-pdbutil llvm-PerfectShuffle llvm-profdata llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj llvm-readtapi llvm-reduce llvm-remarkutil llvm-rtdyld llvm-sim llvm-size llvm-split llvm-stress llvm-strings llvm-strip llvm-symbolizer llvm-tblgen llvm-tli-checker llvm-undname llvm-windres llvm-xray"
# v20
slaves="llvm-addr2line llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-cat llvm-cfi-verify llvm-cgdata llvm-cov llvm-c-test llvm-ctxprof-util llvm-cvtres llvm-cxxdump llvm-cxxfilt llvm-cxxmap llvm-debuginfo-analyzer llvm-debuginfod llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy llvm-objdump llvm-opt-report llvm-otool llvm-pdbutil llvm-PerfectShuffle llvm-profdata llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj llvm-readtapi llvm-reduce llvm-remarkutil llvm-rtdyld llvm-sim llvm-size llvm-split llvm-stress llvm-strings llvm-strip llvm-symbolizer llvm-tblgen llvm-tli-checker llvm-undname llvm-windres llvm-xray"

update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"

master="clang"
# up to v17
slaves="asan_symbolize bugpoint clang++ clang-cpp clangd count dsymutil FileCheck ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-instr lldb-server lldb-vscode lld-link lli lli-child-target not obj2yaml opt sanstats split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"
# v18
slaves="asan_symbolize bugpoint clang++ clang-cpp clangd count dsymutil FileCheck ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-dap lldb-instr lldb-server lld-link lli lli-child-target not obj2yaml opt sanstats split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"
# v19 and v20
slaves="asan_symbolize bugpoint clang++ clang-cpp clangd count dsymutil FileCheck ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-dap lldb-instr lldb-server lld-link lli lli-child-target not obj2yaml opt reduce-chunk-list sanstats split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"

update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"

exit


# to uninstall a Clang version
# LLVM_VERSION=18
# sudo apt purge -y clang-${LLVM_VERSION} lldb-${LLVM_VERSION} lld-${LLVM_VERSION} clangd-${LLVM_VERSION} && sudo apt autoremove -y
# sudo update-alternatives --config clang
# sudo update-alternatives --config llvm-config

# to generate the list of slaves on a clean Ubuntu vm
sudo apt update && sudo apt full-upgrade -y && sudo apt autoremove -y && sudo apt autoclean
ls /usr/bin > usr_bin_orig
version=20
curl -sSL https://apt.llvm.org/llvm.sh | sudo bash -s "$version"
# curl -sSL https://apt.llvm.org/llvm.sh | sudo bash -s "$version" all
ls /usr/bin > usr_bin_new
diff usr_bin_new usr_bin_orig | awk -v ver="$version" '/^< (llvm-).*-'"$version"'$/ && !/llvm-config-'"$version"'$/ {gsub("-" ver,""); printf "%s ", $2} END {print ""}' > slaves_llvm
diff usr_bin_new usr_bin_orig | awk -v ver="$version" '/^< / && !/llvm-/ && !/clang-'"$version"'$/ && /-'"$version"'$/ {gsub("^< ",""); gsub("-" ver "$",""); printf "%s ", $0} END {print ""}' > slaves_clang
# check if an application is already a master in:
# /var/lib/dpkg/alternatives/

@g-berthiaume
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Thanks, @mnesarco; it works great.

@hasufell
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hasufell commented Dec 9, 2022 •
edited
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...

master="clang"
slaves="analyze-build asan_symbolize bugpoint c-index-test clang++ clang-apply-replacements clang-change-namespace clang-check clang-cl clang-cpp clangd clang-doc clang-extdef-mapping clang-format clang-format-diff clang-include-fixer clang-linker-wrapper clang-move clang-nvlink-wrapper clang-offload-bundler clang-offload-packager clang-offload-wrapper clang-pseudo clang-query clang-refactor clang-rename clang-reorder-fields clang-repl clang-scan-deps clang-tidy count diagtool dsymutil FileCheck find-all-symbols git-clang-format hmaptool hwasan_symbolize intercept-build ld64.lld ld.lld llc lld lldb lldb-argdumper lldb-instr lldb-server lldb-vscode lld-link lli lli-child-target modularize not obj2yaml opt pp-trace run-clang-tidy sancov sanstats scan-build scan-build-py scan-view split-file UnicodeNameMappingGenerator verify-uselistorder wasm-ld yaml2obj yaml-bench"

update_alternatives "${version}" "${priority}" "${master}" "${slaves}" "${path}"

This is the only correct one. The others are all missing opt, llc etc. Not sure how those users got their toolchain working without it.

@ppigazzini
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This is the only correct one. The others are all missing opt, llc etc. Not sure how those users got their toolchain working without it.

To be honest the original script is 5 years old, but still a great reference. I wrote my version two months ago checking the differences on a clean Ubuntu before and after installing clang-15 llvm-15.

@miguno
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miguno commented Nov 4, 2023

Thanks @ppigazzini. Your script at https://gist.github.com/junkdog/70231d6953592cd6f27def59fe19e50d?permalink_comment_id=4336074#gistcomment-4336074 seems to work out-of-the-box on Debian 12, too.

@StatusCode404
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StatusCode404 commented Nov 5, 2023 •
edited
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This is the only correct one. The others are all missing opt, llc etc. Not sure how those users got their toolchain working without it.

To be honest the original script is 5 years old, but still a great reference. I wrote my version two months ago checking the differences on a clean Ubuntu before and after installing clang-15 llvm-15.

Yeah I've had to update my script as well over the years, this is what I'm using now a days with LLVM 15.0.7.

This is on Ubuntu 22.04+ Builds Linux kernel with LTO.

#!/usr/bin/env bash

#     --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

function register_clang_version {
    local version=$1
    local priority=$2

    update-alternatives \
       	--verbose \
        --install /usr/bin/llvm-config          llvm-config          /usr/bin/llvm-config-${version} ${priority} \
        --slave   /usr/bin/llvm-ar              llvm-ar              /usr/bin/llvm-ar-${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-c-test          llvm-c-test          /usr/bin/llvm-c-test-${version} \
        --slave   /usr/bin/llvm-cat             llvm-cat             /usr/bin/llvm-cat-${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-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-${version} \
        --slave   /usr/bin/llvm-diff            llvm-diff            /usr/bin/llvm-diff-${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-lib             llvm-lib             /usr/bin/llvm-lib-${version} \
        --slave   /usr/bin/llvm-link            llvm-link            /usr/bin/llvm-link-${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-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-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-${version} \
        --slave   /usr/bin/llvm-ranlib          llvm-ranlib          /usr/bin/llvm-ranlib-${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-${version} \
        --slave   /usr/bin/llvm-rtdyld          llvm-rtdyld          /usr/bin/llvm-rtdyld-${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-tblgen          llvm-tblgen          /usr/bin/llvm-tblgen-${version} \
        --slave   /usr/bin/llvm-undname         llvm-undname         /usr/bin/llvm-undname-${version} \
        --slave   /usr/bin/llvm-xray            llvm-xray            /usr/bin/llvm-xray-${version}
        

    update-alternatives \
       	--verbose \
        --install /usr/bin/clang					clang					/usr/bin/clang-${version} ${priority} \
        --slave   /usr/bin/clang++					clang++					/usr/bin/clang++-${version}  \
        --slave   /usr/bin/clang-format				clang-format			/usr/bin/clang-format-${version}  \
        --slave   /usr/bin/clang-cpp				clang-cpp				/usr/bin/clang-cpp-${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/dsymutil					dsymutil				/usr/bin/dsymutil-${version} \
        --slave   /usr/bin/lld						lld						/usr/bin/lld-${version} \
        --slave   /usr/bin/ld.lld					ld.lld					/usr/bin/ld.lld-${version} \
        --slave   /usr/bin/lld-link					lld-link				/usr/bin/lld-link-${version} \
        --slave   /usr/bin/llc						llc						/usr/bin/llc-${version} \
        --slave   /usr/bin/lli						lli						/usr/bin/lli-${version} \
        --slave   /usr/bin/obj2yaml					obj2yaml				/usr/bin/obj2yaml-${version} \
        --slave   /usr/bin/opt						opt						/usr/bin/opt-${version} \
        --slave   /usr/bin/sanstats					sanstats				/usr/bin/sanstats-${version} \
        --slave   /usr/bin/verify-uselistorder		verify-uselistorder		/usr/bin/verify-uselistorder-${version} \
        --slave   /usr/bin/wasm-ld					wasm-ld					/usr/bin/wasm-ld-${version} \
        --slave   /usr/bin/yaml2obj					yaml2obj					/usr/bin/yaml2obj-${version}
        
}

register_clang_version $1 $2

@ShangjinTang
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ShangjinTang commented Jan 25, 2024 •
edited
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There are plenty llvm related tools (more than 100).

I‘ve wrote a script to glob all llvm tools instead of manually specify them , tested on Ubuntu 22.04 x86_64.

It would automatically glob all the tools in /lib/llvm-${VERSION} as slave commands of /usr/bin/clang-{VERSION}

See: https://github.com/ShangjinTang/dotfiles/blob/05ef87daae29475244c276db5d406b58c52be445/linux/ubuntu/22.04/bin/update-alternatives-clang

To use it (requires sudo permission):

wget https://raw.githubusercontent.com/ShangjinTang/dotfiles/05ef87daae29475244c276db5d406b58c52be445/linux/ubuntu/22.04/bin/update-alternatives-clang
sudo bash ./update-alternatives-clang

Result:

[Adding alternative /usr/bin/clang-17 ...]
Master command: clang-17
Slave commands: amdgpu-arch-17 analyze-build-17 bugpoint-17 c-index-test-17 clang++-17 clang-apply-replacements-17 clang-change-namespace-17 clang-check-17 clang-cl-17 clang-cpp-17 clangd-17 clang-doc-17 clang-extdef-mapping-17 clang-format-17 clang-include-cleaner-17 clang-include-fixer-17 clang-linker-wrapper-17 clang-move-17 clang-offload-bundler-17 clang-offload-packager-17 clang-pseudo-17 clang-query-17 clang-refactor-17 clang-rename-17 clang-reorder-fields-17 clang-repl-17 clang-scan-deps-17 clang-tblgen-17 clang-tidy-17 count-17 diagtool-17 dsymutil-17 FileCheck-17 find-all-symbols-17 git-clang-format-17 hmaptool-17 intercept-build-17 ld64.lld-17 ld.lld-17 llc-17 lld-17 lldb-17 lldb-argdumper-17 lldb-instr-17 lldb-server-17 lldb-vscode-17 lld-link-17 lli-17 lli-child-target-17 llvm-addr2line-17 llvm-ar-17 llvm-as-17 llvm-bcanalyzer-17 llvm-bitcode-strip-17 llvm-cat-17 llvm-cfi-verify-17 llvm-config-17 llvm-cov-17 llvm-c-test-17 llvm-cvtres-17 llvm-cxxdump-17 llvm-cxxfilt-17 llvm-cxxmap-17 llvm-debuginfo-analyzer-17 llvm-debuginfod-17 llvm-debuginfod-find-17 llvm-diff-17 llvm-dis-17 llvm-dlltool-17 llvm-dwarfdump-17 llvm-dwarfutil-17 llvm-dwp-17 llvm-exegesis-17 llvm-extract-17 llvm-gsymutil-17 llvm-ifs-17 llvm-install-name-tool-17 llvm-jitlink-17 llvm-jitlink-executor-17 llvm-lib-17 llvm-libtool-darwin-17 llvm-link-17 llvm-lipo-17 llvm-lto-17 llvm-lto2-17 llvm-mc-17 llvm-mca-17 llvm-ml-17 llvm-modextract-17 llvm-mt-17 llvm-nm-17 llvm-objcopy-17 llvm-objdump-17 llvm-omp-device-info-17 llvm-omp-kernel-replay-17 llvm-opt-report-17 llvm-otool-17 llvm-pdbutil-17 llvm-PerfectShuffle-17 llvm-profdata-17 llvm-profgen-17 llvm-ranlib-17 llvm-rc-17 llvm-readelf-17 llvm-readobj-17 llvm-reduce-17 llvm-remark-size-diff-17 llvm-remarkutil-17 llvm-rtdyld-17 llvm-sim-17 llvm-size-17 llvm-split-17 llvm-stress-17 llvm-strings-17 llvm-strip-17 llvm-symbolizer-17 llvm-tapi-diff-17 llvm-tblgen-17 llvm-tli-checker-17 llvm-undname-17 llvm-windres-17 llvm-xray-17 modularize-17 not-17 nvptx-arch-17 obj2yaml-17 opt-17 pp-trace-17 run-clang-tidy-17 sancov-17 sanstats-17 scan-build-17 scan-build-py-17 scan-view-17 split-file-17 UnicodeNameMappingGenerator-17 verify-uselistorder-17 wasm-ld-17 yaml2obj-17 yaml-bench-17
[Adding alternative /usr/bin/clang-17: succeeded]

[Adding alternative /usr/bin/clang-18 ...]
Master command: clang-18
Slave commands: amdgpu-arch-18 analyze-build-18 bugpoint-18 c-index-test-18 clang++-18 clang-apply-replacements-18 clang-change-namespace-18 clang-check-18 clang-cl-18 clang-cpp-18 clangd-18 clang-doc-18 clang-extdef-mapping-18 clang-format-18 clang-include-cleaner-18 clang-include-fixer-18 clang-linker-wrapper-18 clang-move-18 clang-offload-bundler-18 clang-offload-packager-18 clang-pseudo-18 clang-query-18 clang-refactor-18 clang-rename-18 clang-reorder-fields-18 clang-repl-18 clang-scan-deps-18 clang-tblgen-18 clang-tidy-18 count-18 diagtool-18 dsymutil-18 FileCheck-18 find-all-symbols-18 git-clang-format-18 hmaptool-18 intercept-build-18 ld64.lld-18 ld.lld-18 llc-18 lld-18 lld-link-18 lli-18 lli-child-target-18 llvm-addr2line-18 llvm-ar-18 llvm-as-18 llvm-bcanalyzer-18 llvm-bitcode-strip-18 llvm-cat-18 llvm-cfi-verify-18 llvm-config-18 llvm-cov-18 llvm-c-test-18 llvm-cvtres-18 llvm-cxxdump-18 llvm-cxxfilt-18 llvm-cxxmap-18 llvm-debuginfo-analyzer-18 llvm-debuginfod-18 llvm-debuginfod-find-18 llvm-diff-18 llvm-dis-18 llvm-dlltool-18 llvm-dwarfdump-18 llvm-dwarfutil-18 llvm-dwp-18 llvm-exegesis-18 llvm-extract-18 llvm-gsymutil-18 llvm-ifs-18 llvm-install-name-tool-18 llvm-jitlink-18 llvm-jitlink-executor-18 llvm-lib-18 llvm-libtool-darwin-18 llvm-link-18 llvm-lipo-18 llvm-lto-18 llvm-lto2-18 llvm-mc-18 llvm-mca-18 llvm-ml-18 llvm-modextract-18 llvm-mt-18 llvm-nm-18 llvm-objcopy-18 llvm-objdump-18 llvm-opt-report-18 llvm-otool-18 llvm-pdbutil-18 llvm-PerfectShuffle-18 llvm-profdata-18 llvm-profgen-18 llvm-ranlib-18 llvm-rc-18 llvm-readelf-18 llvm-readobj-18 llvm-readtapi-18 llvm-reduce-18 llvm-remarkutil-18 llvm-rtdyld-18 llvm-sim-18 llvm-size-18 llvm-split-18 llvm-stress-18 llvm-strings-18 llvm-strip-18 llvm-symbolizer-18 llvm-tblgen-18 llvm-tli-checker-18 llvm-undname-18 llvm-windres-18 llvm-xray-18 modularize-18 not-18 nvptx-arch-18 obj2yaml-18 opt-18 pp-trace-18 run-clang-tidy-18 sancov-18 sanstats-18 scan-build-18 scan-build-py-18 scan-view-18 split-file-18 UnicodeNameMappingGenerator-18 verify-uselistorder-18 wasm-ld-18 yaml2obj-18 yaml-bench-18
[Adding alternative /usr/bin/clang-18: succeeded]

======================================================================
clang alternative is set to: /usr/bin/clang-18
======================================================================

Info:
  use 'sudo update-alternatives --config clang' to change default clang alternative
  use 'sudo update-alternatives --remove clang /usr/bin/clang-*' to delete a clang alternative
  use 'sudo update-alternatives --remove-all clang' to delete all clang alternatives

@amirsojoodi
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I had to add a bunch of other slaves to clang config, including clangd, clang-tidy, etc.

#!/usr/bin/env bash

#     --slave /usr/bin/$1 $1 /usr/bin/$1-\${version} \\

function register_clang_version {
    local version=$1
    local priority=$2

    update-alternatives \
         --verbose \
        --install /usr/bin/llvm-config          llvm-config          /usr/bin/llvm-config-${version} ${priority} \
        --slave   /usr/bin/llvm-ar              llvm-ar              /usr/bin/llvm-ar-${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-c-test          llvm-c-test          /usr/bin/llvm-c-test-${version} \
        --slave   /usr/bin/llvm-cat             llvm-cat             /usr/bin/llvm-cat-${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-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-${version} \
        --slave   /usr/bin/llvm-diff            llvm-diff            /usr/bin/llvm-diff-${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-lib             llvm-lib             /usr/bin/llvm-lib-${version} \
        --slave   /usr/bin/llvm-link            llvm-link            /usr/bin/llvm-link-${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-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-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-${version} \
        --slave   /usr/bin/llvm-ranlib          llvm-ranlib          /usr/bin/llvm-ranlib-${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-${version} \
        --slave   /usr/bin/llvm-rtdyld          llvm-rtdyld          /usr/bin/llvm-rtdyld-${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-tblgen          llvm-tblgen          /usr/bin/llvm-tblgen-${version} \
        --slave   /usr/bin/llvm-undname         llvm-undname         /usr/bin/llvm-undname-${version} \
        --slave   /usr/bin/llvm-xray            llvm-xray            /usr/bin/llvm-xray-${version}
        

    update-alternatives \
         --verbose \
        --install /usr/bin/clang                clang                /usr/bin/clang-${version} ${priority} \
        --slave   /usr/bin/clang++              clang++              /usr/bin/clang++-${version}  \
        --slave   /usr/bin/clang-format         clang-format         /usr/bin/clang-format-${version}  \
        --slave   /usr/bin/clang-cpp            clang-cpp            /usr/bin/clang-cpp-${version} \
        --slave   /usr/bin/clang-cl             clang-cl             /usr/bin/clang-cl-${version} \
        --slave   /usr/bin/clangd               clangd               /usr/bin/clangd-${version} \
        --slave   /usr/bin/clang-tidy           clang-tidy           /usr/bin/clang-tidy-${version} \
        --slave   /usr/bin/clang-check          clang-check          /usr/bin/clang-check-${version} \
        --slave   /usr/bin/clang-query          clang-query          /usr/bin/clang-query-${version} \
        --slave   /usr/bin/asan_symbolize       asan_symbolize       /usr/bin/asan_symbolize-${version} \
        --slave   /usr/bin/bugpoint             bugpoint             /usr/bin/bugpoint-${version} \
        --slave   /usr/bin/dsymutil             dsymutil             /usr/bin/dsymutil-${version} \
        --slave   /usr/bin/lld                  lld                  /usr/bin/lld-${version} \
        --slave   /usr/bin/ld.lld               ld.lld               /usr/bin/ld.lld-${version} \
        --slave   /usr/bin/lld-link             lld-link             /usr/bin/lld-link-${version} \
        --slave   /usr/bin/llc                  llc                  /usr/bin/llc-${version} \
        --slave   /usr/bin/lli                  lli                  /usr/bin/lli-${version} \
        --slave   /usr/bin/obj2yaml             obj2yaml             /usr/bin/obj2yaml-${version} \
        --slave   /usr/bin/opt                  opt                  /usr/bin/opt-${version} \
        --slave   /usr/bin/sanstats             sanstats             /usr/bin/sanstats-${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}
        
}

register_clang_version $1 $2

@skull-squadron
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Did an audit of the llvm 19 family of packages on Debian from apt.llvm.org and found the below to be exhaustive, and separated by package, whereas the above conflate multiple packages together:

Here's the script snippet 
update-alternatives-many() {
  local exe="$1" version="$2" priority="$3"
  shift 3
  local args=(--install "/usr/bin/${exe}" "${exe}" "/usr/bin/${exe}-${version}" "${priority}")
  local slave slave_tgt
  for slave in "$@"; do
    if [[ "$slave" = *.py ]]; then
      slave_tgt="${slave%.py}-${version}.py"
    else
      slave_tgt="${slave}-${version}"
    fi
    args+=(--slave "/usr/bin/${slave}" "${slave}" "/usr/bin/${slave_tgt}")
  done
  update-alternatives "${args[@]}"
}

update-alternatives-llvm() {
  local version="$1" priority="${2:-100}"

  update-alternatives-many llvm-bolt "${version}" "${priority}" \
    llvm-bolt-heatmap llvm-boltdiff merge-fdata perf2bolt

  update-alternatives-many clang "${version}" "${priority}" \
    clang++ clang-cpp asan_symbolize

  update-alternatives-many clang-format "${version}" "${priority}" \
    clang-format-diff git-clang-format

  update-alternatives-many clang-tidy "${version}" "${priority}" \
    clang-tidy-diff.py run-clang-tidy run-clang-tidy.py

  # clang-tools
  update-alternatives-many clang-check "${version}" "${priority}" \
    amdgpu-arch analyze-build c-index-test clang-apply-replacements \
    clang-change-namespace clang-cl clang-doc clang-extdef-mapping \
    clang-include-cleaner clang-include-fixer clang-installapi \
    clang-linker-wrapper clang-move clang-nvlink-wrapper \
    clang-offload-bundler clang-offload-packager clang-pseudo \
    clang-query clang-refactor clang-rename clang-reorder-fields \
    clang-repl clang-scan-deps clang-tblgen diagtool find-all-symbols \
    hmaptool hwasan_symbolize intercept-build modularize nvptx-arch \
    pp-trace sancov scan-build scan-build-py scan-view

  update-alternatives-many clangd "${version}" "${priority}"

  # flang
  update-alternatives-many flang-new "${version}" "${priority}" \
    bbc f18-parse-demo fir-opt tco

  # libomp-dev
  update-alternatives-many llvm-omp-device-info "${version}" "${priority}" \
    llvm-omp-kernel-replay

  update-alternatives-many lld "${version}" "${priority}" \
    ld.lld ld64.lld lld-link wasm-ld

  update-alternatives-many lldb "${version}" "${priority}" \
    lldb-argdumper lldb-dap lldb-instr lldb-server

  # llvm-runtime
  update-alternatives-many lli "${version}" "${priority}" \
    lli-child-target

  # llvm-tools
  update-alternatives-many not "${version}" "${priority}" \
    FileCheck UnicodeNameMappingGenerator count \
    split-file yaml-bench

  # llvm
  update-alternatives-many llvm-config "${version}" "${priority}" \
    bugpoint dsymutil llc llvm-PerfectShuffle llvm-addr2line \
    llvm-ar llvm-as llvm-bcanalyzer llvm-bitcode-strip llvm-c-test \
    llvm-cat llvm-cfi-verify llvm-cov llvm-cvtres llvm-cxxdump \
    llvm-cxxfilt llvm-cxxmap llvm-debuginfo-analyzer llvm-debuginfod \
    llvm-debuginfod-find llvm-diff llvm-dis llvm-dlltool llvm-dwarfdump \
    llvm-dwarfutil llvm-dwp llvm-exegesis llvm-extract llvm-gsymutil \
    llvm-ifs llvm-install-name-tool llvm-jitlink llvm-jitlink-executor \
    llvm-lib llvm-libtool-darwin llvm-link llvm-lipo llvm-lto llvm-lto2 \
    llvm-mc llvm-mca llvm-ml llvm-modextract llvm-mt llvm-nm llvm-objcopy \
    llvm-objdump llvm-opt-report llvm-otool llvm-pdbutil llvm-profdata \
    llvm-profgen llvm-ranlib llvm-rc llvm-readelf llvm-readobj \
    llvm-readtapi llvm-reduce llvm-remarkutil llvm-rtdyld llvm-sim \
    llvm-size llvm-split llvm-stress llvm-strings llvm-strip \
    llvm-symbolizer llvm-tblgen llvm-tli-checker llvm-undname \
    llvm-windres llvm-xray obj2yaml opt reduce-chunk-list sanstats \
    verify-uselistorder yaml2obj

  # mlir-tools
  update-alternatives-many mlir-tblgen "${version}" "${priority}" \
    mlir-cat mlir-cpu-runner mlir-linalg-ods-yaml-gen mlir-lsp-server \
    mlir-minimal-opt mlir-minimal-opt-canonicalize mlir-opt mlir-pdll \
    mlir-pdll-lsp-server mlir-query mlir-reduce mlir-transform-opt \
    mlir-translate tblgen-lsp-server tblgen-to-irdl
}

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