ld: Symbols

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1 3.10.3 Symbol Names
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1 Unless quoted, symbol names start with a letter, underscore, or period
1 and may include letters, digits, underscores, periods, and hyphens.
1 Unquoted symbol names must not conflict with any keywords.  You can
1 specify a symbol which contains odd characters or has the same name as a
1 keyword by surrounding the symbol name in double quotes:
1      "SECTION" = 9;
1      "with a space" = "also with a space" + 10;
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1    Since symbols can contain many non-alphabetic characters, it is
1 safest to delimit symbols with spaces.  For example, 'A-B' is one
1 symbol, whereas 'A - B' is an expression involving subtraction.
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