要请求gcc所有的检测函数，每个文件都必须使用- finstrument - functions和- g选项进行编译，这样可以保留调试符号。

To request that GCC instrument all functions, every file must be compiled with the options -finstrument-functions and -g to retain debugging symbols.

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您可以 通过定义保留的 d_whitespace() 函数来控制空格的识别（它分离解析符号）； 这样就使得您可以随意使用标记。

You can control white space recognition (that separates parse symbols) by defining the reserved d_whitespace() function; this enables you to tokenize however you like.

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lcomm conversion _ buffer, 16384保留16 K空间，符号conversion _ buffer定义开始地址。

Lcomm conversion_buffer, 16384 reserves 16k of space, with the starting address defined in the symbol conversion_buffer.

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