1、获取源代码
The versions chosen are not necessarily the most recent, but they do seem to work together with a minimum of patching. The last two files are only necessary if you are targeting the Atmel AT91RM9200 CPU.
http://ftp.gnu.org/gnu/binutils/binutils-2.16.tar.gz
http://ftp.gnu.org/gnu/gcc/gcc-3.4.4/gcc-3.4.4.tar.bz2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=csl-arm-branch&r1=1.563.4.2&r2=1.563.4.3
http://frank.harvard.edu/~coldwell/toolchain/t-linux.diff
http://ftp.gnu.org/gnu/glibc/glibc-2.3.5.tar.gz
http://ftp.gnu.org/gnu/glibc/glibc-linuxthreads-2.3.5.tar.gz
http://frank.harvard.edu/~coldwell/toolchain/ioperm.c.diff
http://ftp.kernel.org/pub/linux/kernel/v2.6/linux-2.6.10.tar.gz
http://maxim.org.za/AT91RM9200/2.6/2.6.10-at91.patch.gz
http://maxim.org.za/AT91RM9200/2.6/26_at91_serial.c.gz
2、设置环境变量
＃vi ~/.bashrc
添加如下内容
export PREFIX=/usr/local/arm/3.4.4
export TARGET=arm-linux
export SYSROOT=${PREFIX}/sysroot
export ARCH=arm
export CROSS_COMPILE=${TARGET}-
export PATH=$PATH:${PREFIX}/bin
注销系统，重新登录，使得环境变量生效
3、建立二进制工具
＃mkdir -p ${PREFIX}/src
＃cd ${PREFIX}/src
＃tar zxvf binutils-2.16.tar.gz
＃mkdir -p BUILD/binutils-2.16
＃cd BUILD/binutils-2.16
＃../../binutils-2.16/configure --prefix=${PREFIX} --target=${TARGET} --with-sysroot=${SYSROOT} && make && make install&& echo ok(如果最后一行显示ok则表示安装成功)
4、建立内核头文件
＃cd ${PREFIX}/src
＃tar zxvf linux-2.6.10.tar.gz
＃ln -s linux-2.6.10 linux
＃zcat 2.6.10-at91.patch.gz | patch -d linux -p1
＃cd linux
＃make at91rm9200dk_defconfig
＃make include/linux/version.h
＃mkdir -p ${SYSROOT}/usr/include
＃cp -a ${PREFIX}/src/linux/include/linux ${SYSROOT}/usr/include/linux
＃cp -a ${PREFIX}/src/linux/include/asm-arm ${SYSROOT}/usr/include/asm
＃cp -a ${PREFIX}/src/linux/include/asm-generic ${SYSROOT}/usr/include/asm-generic
5、安装glibc头文件
＃cd ${PREFIX}/src
＃tar zxvf glibc-2.3.5.tar.gz
＃patch -d glibc-2.3.5 -p1 <ioperm.c.diff
＃cd glibc-2.3.5
＃tar xvfz ../glibc-linuxthreads-2.3.5.tar.gz
＃cd ..
＃mkdir -p BUILD/glibc-2.3.5-headers
＃cd BUILD/glibc-2.3.5-headers
＃../../glibc-2.3.5/configure --prefix=/usr --host=i386-redhat-linux --enable-add-ons=linuxthreads --with-headers=${SYSROOT}/usr/include&& make cross-compiling=yes install_root=${SYSROOT}install-headers && echo ok
注意： --host={TARGET}是不行的，要根据宿主机来修改
＃touch ${SYSROOT}/usr/include/gnu/stubs.h
＃touch ${SYSROOT}/usr/include/bits/stdio_lim.h
6、建立初始编译器
＃cd ${PREFIX}/src
＃tar jxvf gcc-3.4.4.tar.bz2
＃patch -d gcc-3.4.4 -p1 < flow.c.diff
＃patch -d gcc-3.4.4 -p1 < t-linux.diff
＃mkdir -p BUILD/gcc-3.4.4-stage1
＃cd BUILD/gcc-3.4.4-stage1
＃../../gcc-3.4.4/configure --prefix=${PREFIX} --target=${TARGET} --enable-languages=c --with-sysroot=${SYSROOT} && make&& make install && echo ok
7、建立c库
＃cd ${PREFIX}/src
＃mkdir -p BUILD/glibc-2.3.5
＃BUILD_CC=gcc CC=${CROSS_COMPILE}gcc AR=${CROSS_COMPILE}ar RANLIB=${CROSS_COMPILE}ranlib AS=${CROSS_COMPILE}as LD=${CROSS_COMPILE}ld ../../glibc-2.3.5/configure --prefix=/usr --build=i386-redhat-linux --host=arm-unknown-linux-gnu --target=arm-unknown-linux-gnu --without-__thread --enable-add-ons=linuxthreads --with-headers=${SYSROOT}/usr/include && make && make install_root=${SYSROOT} install && echo ok
8、建立全套编译器
＃cd ${PREFIX}/src
＃mkdir -p BUILD/gcc-3.4.4
＃cd BUILD/gcc-3.4.4
9、测试
1)编写一个HelloWorld程序，然后arm-unknown-linux-gnu-gcc helloworld.c -o helloworld
2)file helloworld
aa: ELF 32-bit LSB executable, ARM, version 1, for GNU/Linux 2.0.0, dynamically linked (uses shared libs), not stripped
如果显示出上面的输出，说明你编译了一个能在arm体系结构下运行的 helloworld，证明你的编译工具做成功了。
10、内核镜像（选做）
下载一个26_at91_serial.c.gz文件
1）
cd ${PREFIX}/src/
zcat 26_at91_serial.c.gz > linux/drivers/serial/at91_serial.c
2)
cd ${PREFIX}/src/linux
make zImage
make modules
make INSTALL_MOD_PATH=${SYSROOT} modules_install
参考地址：http://blog.chinaunix.net/u/27396/showart_256126.html
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