自己动手编cross-toolchain for ARM

最近在做一个ARM板子的linux 系统时，发生了一个诡异的问题：busybox失败，定位后发现如果open一个不存在的文件，则会直接产生SIGSEGV异常，而不是open返回-1，如果打开存在的文件，则不会有问题。怀疑失败原因是glibc库与kernel的版本不匹配，于是干脆自己动手做了个toolchain。
经过一个周末的折腾，在""上面script的帮助下，终于制作出了自己的tool chain :)
有了与kernel匹配的glibc库，之前open的问题就消失了。

下面是我的编译脚本：

#!/bin/bash

# author: fireaxe.hq
# description: The script for building crosstool automatically
# usage: chmod +x crosstool-4.8.2.sh && ./crosstool-4.8.2.sh
# linux-3.12.17
# binutils-2.24 glibc-2.18 glibc-ports-2.16.0 gcc-4.8.2

function set_sys
{
    apt-get update && apt-get install build-essential libncurses5-dev gawk libmpfr-dev -y
}

function set_env
{
    export USRROOT=/home/hao1404/Desktop
    export KRNROOT=${USRROOT}/kernel/linux-3.12.17
    export SRCROOT=${USRROOT}/toolchain

    export TARGET=arm-qhao-linux-gnueabi

    export PREFIX=/opt/mytoolchain
    export BUILD=${SRCROOT}/build-tools
    export TARGET_PREFIX=${PREFIX}/${TARGET}
    export PATH=${PREFIX}/bin:${PATH}
}

function create_dir
{
    mkdir -p ${BUILD}/build-binutils ${BUILD}/build-boot-gcc ${BUILD}/build-gcc ${BUILD}/build-glibc ${BUILD}/build-glibc-headers
    mkdir -p ${TARGET_PREFIX}
}

function install_gmp_mpc_mpfr
{
    cd ${SRCROOT}

    cd gmp-6.0.0
    ./configure --prefix=/usr/local/gmp-6.0.0
    make
    make install
    make distclean

    cd ../mpc-1.0.2
    ./configure --prefix=/usr/local/mpc-1.0.2
    make
    make install
    make distclean

    cd ../mpfr-3.1.2
    ./configure --prefix=/usr/local/mpfr-3.1.2
    make
    make install
    make distclean
}

function install_cross_binutils
{
    cd ${BUILD}
    cd build-binutils
    ../../binutils-2.24/configure --target=${TARGET} --prefix=${PREFIX} --with-sysroot=${TARGET_PREFIX}
    make
    make install
}

function install_cross_gcc
{
    cd ${BUILD}
    rm -rf ../gcc-4.8.2/gmp
    rm -rf ../gcc-4.8.2/mpc
    rm -rf ../gcc-4.8.2/mpfr
    cp -r ../gmp-6.0.0 ../gcc-4.8.2/gmp
    cp -r ../mpc-1.0.2 ../gcc-4.8.2/mpc
    cp -r ../mpfr-3.1.2 ../gcc-4.8.2/mpfr
    cd build-boot-gcc
    ../../gcc-4.8.2/configure --target=${TARGET} --prefix=${PREFIX} --with-sysroot=${TARGET_PREFIX} --with-arch=armv7-a --disable-shared --disable-threads --disable-multilib --without-headers --with-newlib --enable-languages=c,c++ -with-gmp=/usr/local/gmp-6.0.0 -with-mpfr=/usr/local/mpfr-3.1.2 -with-mpc=/usr/local/mpc-1.0.2
    make all-gcc
    make install-gcc
    make all-target-libgcc
    make install-target-libgcc
}

function install_linux_headers
{
    cd ${KRNROOT}
    make headers_install
    cp -r ../obj/linux/tmparm/usr/include ${TARGET_PREFIX}
}

function install_glibc_headers
{
    cd ${BUILD}
    cp -r ../glibc-ports-2.16.0 ../glibc-2.18/ports
    cd build-glibc-headers
    echo "libc_cv_forced_unwind=yes" > config.cache
    echo "libc_cv_c_cleanup=yes" >> config.cache
    echo "libc_cv_arm_tls=yes" >> config.cache
    ../../glibc-2.18/configure --host=${TARGET} --prefix="/usr" --with-sysroot=${TARGET_PREFIX} --enable-add-ons --with-headers=${TARGET_PREFIX}/include --cache-file=config.cache
    make cross-compiling=yes install_root=${TARGET_PREFIX} prefix="" install-headers
}

function install_glibc
{
    cd ${BUILD}/build-glibc
    echo "libc_cv_forced_unwind=yes" > config.cache
    echo "libc_cv_c_cleanup=yes" >> config.cache
    CC=${TARGET}-gcc ../../glibc-2.18/configure --host=${TARGET} --prefix="/usr" --with-sysroot=${TARGET_PREFIX} --enable-add-ons --with-headers=${TARGET_PREFIX}/include --cache-file=config.cache
    ln -s ${PREFIX}/lib/gcc/arm-qhao-linux-gnueabi/4.8.2/libgcc.a ${PREFIX}/lib/gcc/arm-qhao-linux-gnueabi/4.8.2/libgcc_s.a
    ln -s ${PREFIX}/lib/gcc/arm-qhao-linux-gnueabi/4.8.2/libgcc.a ${PREFIX}/lib/gcc/arm-qhao-linux-gnueabi/4.8.2/libgcc_eh.a
    make
    make install_root=${TARGET_PREFIX} prefix="" install
}

function install_gcc
{
    cd ${BUILD}/build-gcc
     mkdir ${TARGET_PREFIX}/usr
    ln -s ${TARGET_PREFIX}/include ${TARGET_PREFIX}/usr/include
    ../../gcc-4.8.2/configure --target=${TARGET} --prefix=${PREFIX} --with-sysroot=${TARGET_PREFIX} --with-arch=armv7-a --enable-shared --enable-__cxa_atexit --disable-nls --enable-c99 --enable-long-long --enable-threads=posix --enable-languages=c,c++ -with-gmp=/usr/local/gmp-6.0.0 -with-mpfr=/usr/local/mpfr-3.1.2 -with-mpc=/usr/local/mpc-1.0.2
    sed -i 's/\/lib\///g' ${TARGET_PREFIX}/lib/libc.so
    sed -i 's/\/lib\///g' ${TARGET_PREFIX}/lib/libpthread.so
    make all
    make install
}

function clean_tempfiles
{
    cd ${SRCROOT}
    rm -rf build-tools
    rm -rf gcc-4.8.2/gmp
    rm -rf gcc-4.8.2/mpc
    rm -rf gcc-4.8.2/mpfr
}

echo =============== set_sys
# set_sys
echo =============== set_env
set_env
echo =============== start create_dir
# create_dir
echo =============== start install_gmp_mpc_mpfr
# install_gmp_mpc_mpfr
echo =============== start install_cross_binutils
# install_cross_binutils
echo =============== install_cross_gcc
# install_cross_gcc
echo =============== start install_glibc
# install_linux_headers
echo =============== start install_glibc_headers
# install_glibc_headers
echo =============== start install_gcc
# install_glibc
echo =============== start install_linux_headers
 install_gcc
echo =============== start test
# clean temp files
echo =============== start cleaning
clean_tempfiles

特别感谢：
其他参考链接：

https://www.linux.com/community/blogs/127-personal/468920-cross-compiling-for-arm

http://blog.csdn.net/linuxarmsummary/article/details/8545968

http://blog.csdn.net/wyjkk/article/details/5792048

http://www.ibm.com/developerworks/cn/linux/l-embcmpl/

http://blog.chinaunix.net/uid-11344913-id-298949.html

http://blog.csdn.net/cnsword/article/details/6118624