I just discovered I can do such as:
//SOURCE PROC
//C EXEC PGM=ASMA90
//SYSIN DD * For caller to override.
// DD * Main body of code
MACRO
TESTIT CSECT
...
END
// PEND
... and the caller can (optionally) provide an overriding
prelude SYSIN containing various ACONTROL and SETC
instructions to govern the rest of the processing. Could
be very useful for storing tailorable SYSIN in a PROCLIB.
Will be even better with symbol substitution in 2.1.
-- gil
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