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Two pass assembler diagnostics

armasm is a two pass assembler and the input code that it reads must be identical in both passes. If a symbol is defined after the :DEF: test for that symbol, then the code read in pass one might be different from the code read in pass two. armasm can warn in this situation.

To do this, use the following command-line option when invoking armasm:

armasm --diag_warning 1907

Example 22 shows that the symbol foo is defined after the :DEF: foo test. Assembling this code with --diag_warning 1907 generates the message:

Warning A1907W: Test for this symbol has been seen and may cause failure in the second pass.
    AREA x,CODE 
    [ :DEF: foo
foo MOV r3, r4

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