https://blog.csdn.net/iMatt/article/details/109599852

1、设置环境

#交叉编译器

```

export CC=arm-buildroot-linux-gnueabihf-gcc

export CXX=arm-buildroot-linux-gnueabihf-g++

export AR=arm-buildroot-linux-gnueabihf-ar

#根目录（便于使用）

export CROSS_ROOT=/home/admin/base_compile/system/PET_RK3288_P01_Linux/buildroot/output/rockchip_rk3288/host/arm-buildroot-linux-gnueabihf/sysroot

#pkg路径

export PKG_CONFIG_PATH=${SDKTARGETSYSROOT}/usr/lib/pkgconfig:${SDKTARGETSYSROOT}/usr/share/pkgconfig

```

2、进入源码目录，创建arm-build

```

cd ./icu4c/source

mkdir arm-build

```

3、预交叉编译处理

```

cd arm-build

../source/runConfigureICU Linux/gcc

make

cd ..

```

4、编译

```

./configure --host=arm-linux --prefix="${SDKTARGETSYSROOT}/usr" CXXFLAGS=-std=c++11 --with-sysroot="$SDKTARGETSYSROOT" --with-cross-build='/home/xilong/como/icu4c/icu4c/arm-build' --disable-samples --disable-tests

make

```

5、安装 sudo make install