关于linaro参见其官网www.linaro.org gcc-linara源码可以从这个网址下载 http://launchpad.net/gcc-linaro/+milestone/4.8-2013.10 gcc的编译依赖于几个库,GMP,MPFR,MPC，首先需要编译他们，从ftp://gcc.gnu.org/pub/gcc/infrastructure/ 下载这几个库的源代码。1. 编译GMP ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-4.3.2.tar.bz2 解压后使用标准的GNU源码编译方法 ./configure --prefix=/home/jqzeng/tools/gmp make make install --host指定的是编译所用主机类型 2. 编译MPFR ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-2.4.2.tar.bz2 ./configure --prefix=/home/jqzeng/tools/mpfr --with-gmp=/home/jqzeng/tools/gmp make && make install 3.编译MPC ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-0.8.1.tar.gz ./configure --prefix=/home/jqzeng/tools/mpc --with-gmp=/home/jqzeng/tools/gmp --with-mpfr=/home/jqzeng/tools/mpfr make && make install 4.编译isl 下载地址 http://isl.gforge.inria.fr/isl-0.12.tar.gz ./configure --prefix=/home/jqzeng/tools/isl --with-gmp-prefix=/home/jqzeng/tools/gmpmake && make install 5.编译cloog 下载地址 http://www.bastoul.net/cloog/pages/download/count.php3?url=./cloog-0.18.1.tar.gz ./configure --prefix=/home/jqzeng/tools/cloog --with-gmp-prefix=/home/jqzeng/tools/gmpmake && make install ./configure --prefix=/home/jqzeng/tools/libelfmake && make install
7.编译binutils http://releases.linaro.org/13.10/components/toolchain/binutils-linaro
./configure --prefix=/usr/local/linaro-gcc --with-sysroot=/usr/local/arm-linux/arm-linux-gnueabi/libc --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabi --with-gmp=/home/jqzeng/tools/gmp --with-isl=/home/jqzeng/tools/isl --with-mpfr=/home/jqzeng/tools/mpfr --with-mpc=/home/jqzeng/tools/mpc
make
sudo make install
加上--with-sysroot是很重要的，否则编译gcc的时候会出现“ld:this linker was not configured to use sysroots”的错误。
8. 安装内核头文件
解压内核并cd到源码目录，执行下面的命令构建sanitized 版本内核头文件。
make ARCH=arm headers_check sudo make ARCH=arm INSTALL_HDR_PATH=/usr/local/arm-linux/arm-linux-gnueabi/libc/usr headers_install
9. 编译c库头文件 eglibc http://releases.linaro.org/13.10/components/toolchain/eglibc-linaro/eglibc-linaro-2.18-2013.10.tar.bz2
mkdir build
CC=gcc ../configure --prefix=/usr/local/arm-linux/arm-linux-gnueabi/libc/usr --build=x86_64-linux-gnu --host=arm-linux-gnueabi --with-header=/usr/local/arm-linux/arm-linux-gnueabi/libc/usr/include
sudo make install-headers
注意这里设置的--host是目标板，与其他地方的不一样。
内核头文件和C库头文件放在sysroot下，消除缺少头文件的问题“The directory that should contain system headers does not exist” 。
10.编译用于编译glibc的gcc解压gcc-linara，cd到源码目录mkdir buildcd build../gcc-linaro-4.8-2013.10/configure --prefix=/usr/local/arm-linux --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabi --with-gmp=/home/jqzeng/tools/gmp --with-mpfr=/home/jqzeng/tools/mpfr --with-mpc=/home/jqzeng/tools/mpc --with-isl=/home/jqzeng/tools/isl --with-cloog=/home/jqzeng/tools/cloog --with-libelf=/home/jqzeng/tools/libelf --enable-languages=c,c++,fortran --enable-multilib --with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3-d16 --with-float=hard --enable-__cxa_atexit --enable-libmudflap --enable-libgomp --enable-libssp --enable-threads=posix --disable-libstdcxx-pch --enable-linker-build-id --enable-gold --enable-c99 --enable-long-long --with-mode=thumb --with-sysroot=/usr/local/linaro-gcc/arm-linux-gnueabi/libc --with-local-prefix=/usr/local/linaro-gcc/arm-linux-gnueabi/libc make -j4
到这里配置出错了 checking for version 0.10 of ISL... no checking for version 0.11 of ISL... no checking for version 0.12 of ISL... no configure: error: Unable to find a usable ISL. See config.log for details. 打开config.log configure:5857: checking for version 0.10 of ISL configure:5876: x86_64-linux-gnu-gcc -o conftest -g -O2 -I/home/jqzeng/tools/isl/include -I/home/jqzeng/tools/gmp/include -I/home/jqzeng/tools/mpfr/include -I/home/jqzeng/tools/mpc/include -L/home/jqzeng/tools/isl/lib conftest.c -lisl >&5 configure:5876: $? = 0 configure:5876: ./conftest ./conftest: error while loading shared libraries: libisl.so.10: cannot open shared object file: No such file or directory configure:5876: $? = 127 configure: program exited with status 127 configure: failed program was: | /* confdefs.h */ | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | #define PACKAGE_URL "" | #define LT_OBJDIR ".libs/" | /* end confdefs.h. */ | #include | #include | int | main () | { | if (strncmp (isl_version (), "isl-0.10", strlen ("isl-0.10")) != 0) | return 1; | | ; | return 0; | } configure:5885: result: no configure:5905: checking for version 0.11 of ISL configure:5924: x86_64-linux-gnu-gcc -o conftest -g -O2 -I/home/jqzeng/tools/isl/include -I/home/jqzeng/tools/gmp/include -I/home/jqzeng/tools/mpfr/include -I/home/jqzeng/tools/mpc/include -L/home/jqzeng/tools/isl/lib conftest.c -lisl >&5 configure:5924: $? = 0 configure:5924: ./conftest 好吧，是加载动态库的时候出问题了。
sudo vim /etc/ld.so.conf.d/ld.isl.so.conf 将isl的lib库的绝对路径写入ld.isl.so.conf文件中 /home/jqzeng/tools/isl/lib 顺便将tools目录下的其他动态库的路径都加上 执行下面的命令重建/etc/ld.so.cache sudo ldconfig 重新来一遍配置gcc-linara。执行make，喝杯咖啡歇会，这是个漫长的过程。sudo make install11 编译eglibc CC=arm-linux-gnueabi-gcc ../configure --prefix=/usr/local/arm-linux/arm-linux-gnueabi/libc/ --build=x86_64-linux-gnu --host=arm-linux-gnueabi --with-header=/usr/local/arm-linux/arm-linux-gnueabi/libc/usr/include --enable-add-ons --with-binutils=/usr/local/arm-linux/bin --enable-shared libc_cv_forced_unwind=yes libc_cv_c_cleanup=yes make
sudo make install
好吧，现在工具链已经编译完成，下一步是使用该工具链编译uboot和kernel。
