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Symbol
attributes
Every
symbol has, as well as its name, the attributes, value
and type. Depending on output format,
symbols can also have auxiliary attributes (such as a.out,
COFF and SOM
formats).
If
you use a symbol without defining it, as
assumes zero for all these attributes, and probably won’t warn you. This
makes the symbol an externally defined symbol, which is generally what
you would want.
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