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它通过提供glibc兼容使得应用程序移植到较小的c 库时相当得容易. 它能够应用到带虚拟存储的Linux和uClinux上.在大多数带MMU部件的平台上为使它更加紧凑,它也能够编译成共享库.uClib

This directory level abstracts out the Linux Operating System dependent
features of uClibc for suported Linux architectures/CPUs.  If you wanted to
port uClibc to some new Linux architecture (arm, mips, etc), this is the place
to add that support.

All the common stuff that is not at all dependent on a particular Linux architecture
goes in the 'common' directory.