6.13 Two pass assembler diagnostics
armasm can issue a warning about code that might not be identical in both assembler passes.
armasm is a two pass assembler and the input code that
the assembler 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
To do this, use the
--diag_warning 1907 command-line option
when invoking armasm.
The following example shows that the symbol
foo is defined after the
:DEF: foo test.
[ :DEF: foo
foo MOV r3, r4
Assembling this code with
1907 generates the message:
Warning A1907W: Test for this symbol has been seen and may cause failure in the second pass.