Build qBittorrent in msys2/clang64

qbt.sh

#!/bin/bash
while getopts 'cbd' flag ; do
    case "${flag}" in
        c) CLNFL=1 ;;   # remove folder
        b) BLD=1 ;;     # build
        d) DPL=1 ;;     # deploy
    esac
done

set -e
export CC=clang CXX=clang++
CFL='-flto=thin -ffunction-sections -fdata-sections -march=native -mtune=native -O3 -pipe'
LFL='-flto=thin -Wl,--gc-sections'

if [[ ! -d qBittorrent || $CLNFL == 1 ]]; then
    rm -rf qBittorrent
    git clone --depth 1 https://github.com/qbittorrent/qBittorrent.git
fi
if [[ $BLD == 1 ]]; then
    cd qBittorrent
    rm -rf build
    cmake -B build -G Ninja -S ./ \
        -DCMAKE_BUILD_TYPE=Release -DSTACKTRACE=OFF -DWEBUI=OFF \
        -DCMAKE_CXX_FLAGS="$CFL -pthread" -DCMAKE_EXE_LINKER_FLAGS="$LFL"
    ninja -C build
    cd ..
fi
if [[ $DPL == 1 ]]; then
    rm -rf qBt
    mkdir -p qBt/profile
    cp qBittorrent/build/qBittorrent.exe qBt
    cd qBt
    windeployqt-qt6 qBittorrent.exe\
        --compiler-runtime \
        --no-system-d3d-compiler \
        --no-translations \
        --skip-plugin-types generic,networkinformation \
        --exclude-plugins  qgif,qicns,qjp2,qjpeg,qmng,qtga,qtiff,qwbmp,qwebp,qsqlmysql,qsqlodbc,qsqlpsql,qcertonlybackend,qopensslbackend \
        --qtpaths "/clang64/bin/qtpaths-qt6.exe"

     while
        files2=$files1
        files1=$(ldd *.{exe,dll} | grep "/clang64/bin/" | grep -v 'Qt6' | sed 's/.* => //;s/ (.*//' | sort -u)
        printf '.'
        for f in $files1; do
            cp -u $f ./
        done
        [[ $files1 != $files2 ]]
    do :; done

    strip -s qBittorrent.exe {./,*/}*.dll
fi