Linux快速切换交叉编译器版本

确保/usr/local/arm下有以下命令格式的交叉编译器文件夹：

gcc-版本号-arm-linux-gnueabihf

比如

gcc-7.5.0-arm-linux-gnueabihf

Shell文件：

#!/bin/bash

# 所有工具链的根目录
TOOLCHAIN_ROOT="/usr/local/arm"

# 显示所有可用版本
function list_versions() {
    echo "Available toolchain versions:"
    for dir in "$TOOLCHAIN_ROOT"/gcc-*; do
        ver=$(basename "$dir" | sed 's/^gcc-\(.*\)-arm.*/\1/')
        echo "  - $ver"
    done
}

# 显示当前交叉编译器版本
function current_version() {
    which arm-linux-gnueabihf-gcc >/dev/null 2>&1 || {
        echo "arm-linux-gnueabihf-gcc not found in PATH"
        return
    }

    echo -n "Current compiler version: "
    arm-linux-gnueabihf-gcc -v 2>&1 | grep "gcc 版本" | awk '{print $3}'
}

# 切换工具链
function switch_version() {
    local version=$1
    local match_dir="$TOOLCHAIN_ROOT/gcc-${version}-arm-linux-gnueabihf"

    if [ ! -d "$match_dir" ]; then
        echo "Error: Toolchain version $version not found in $TOOLCHAIN_ROOT"
        list_versions
        return 1
    fi

    # 清除当前 PATH 中旧的 toolchain 目录
    export PATH=$(echo "$PATH" | tr ':' '\n' | grep -v "$TOOLCHAIN_ROOT" | paste -sd ':' -)
    # 加入新版本路径
    export PATH="$match_dir/bin:$PATH"

    echo "Switched to toolchain version $version"
    current_version
}

# 参数处理
case "$1" in
    list)
        list_versions
        ;;
    current)
        current_version
        ;;
    switch)
        if [ -z "$2" ]; then
            echo "Usage: source toolchain-switcher.sh switch <version>"
        else
            switch_version "$2"
        fi
        ;;
    *)
        echo "Usage:"
        echo "  source toolchain-switcher.sh list           # List available versions"
        echo "  source toolchain-switcher.sh current        # Show current version"
        echo "  source toolchain-switcher.sh switch 4.9.4   # Switch to version"
        ;;
esac

仅在当前终端中一次性有效