https://github.com/crosstool-ng/crosstool-ng/releases 下载最新版
该分支对编译中出现的一些编译error，进行了修正,并对mulitlib的编译进行了一定程度的修正
编译和安装
cd crosstool-ng
xattr -d com.apple.quarantine ./configure //bad interpreter: Operation not permitted
chmod 777 ./configure
指定安装路径(默认安装在/usr/local下).，和mac下的一些ports工具，如gobjcopy，这些可以通过mac-ports 安装
./bootstrap
./configure --prefix=${install_path} --with-objcopy=/opt/local/bin/gobjcopy --with-objdump=/opt/local/bin/gobjdump --with-libtool=/opt/local/bin/glibtool --with-readelf=/opt/local/bin/greadelf --with-gbtoolize=/opt/local/bin/glibtoolize
make
make install
使用crosstool-ng编译arm工具链
ct-ng menuconfig 由于mac有些限制，有些地方需要特别设定下
具体步骤如下：
make version 3.82在编译glibc时有问题，打开EXPERIMENTAL feature以便使用自带的make
Paths and misc options ---> [*] Try features marked as EXPERIMENTAL
打开debug功能，以便可以进行单个step的编译，而不是每次都重新编译所有的
Paths and misc options ---> [*] Debug crosstool-NG
---> Debug crosstool-NG
---> gzip saved states (NEW)
Paths and misc options ---> Maximum log level to see: (INFO)
根据自己的需要定制cpu
Target options ---> Target Architecture (arm)
Target options ---> (armv6k) Architecture level
Target options ---> (arm1176jzf-s) Tune for CPU
Target options ---> (vfp) Use specific FPU
Operating System ---> Target OS (linux)
Operating System ---> Linux kernel version (2.6.32.60 (longterm))
C compiler ---> C compiler (gcc)
C compiler ---> [*] Show Linaro versions
C compiler ---> gcc version (linaro-4.6-2013.04)
C compiler ---> [*] C++
apple gcc不支持静态链接，关闭静态链接
C compiler ---> [ ] Link libstdc++ statically into the gcc binary
这里使用glibc 2.13
C-library ---> C library (glib)
C-library ---> glibc version (2.13)
使用4.3.2的GMP，5.0+的存在编译问题
Companion libraries ---> GMP version (4.3.2)
编译自定义的make,
Companion tools ---> [*] Build some companion tools
Companion tools ---> [*] make
Esc Esc 保存并退出设定界面
编译工具链
ct-ng build
编译完成后，工具链默认存放在在~/x-tools/下
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