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关于MSP430的runtime libraries, 在 MSP430 Optimizing C/C++ Compiler v 4.1 User's Guide中的第七章7 Using Run-Time-Support Functions and Building Libraries有，下载链接为：
http://www.ti.com/lit/ug/slau132g/slau132g.pdf
主要包括：
The run-time-support library contains the following: • ANSI/ISO C/C++ standard library • C I/O library • Low-level support functions that provide I/O to the host operating system • Fundamental arithmetic routines • System startup routine, _c_int00 • Functions and macros that allow C/C++ to access specific instructions
