RTEMS GNU Tools On-Line Library

Alternate

GASP

3.9: Alternate macro syntax

If you specify `-a' or `--alternate' on the GASP command line, the preprocessor uses somewhat different syntax. This syntax is reminiscent of the syntax of Phar Lap macro assembler, but it is not meant to be a full emulation of Phar Lap or similar assemblers. In particular, GASP does not support directives such as DB and IRP, even in alternate syntax mode.

In particular, `-a' (or `--alternate') elicits these differences:

Preprocessor directives

You can use GASP preprocessor directives without a leading `.' dot. For example, you can write `SDATA' with the same effect as `.SDATA'.

LOCAL

One additional directive, LOCAL, is available. See Macros, for an explanation of how to use LOCAL.

String delimiters

You can write strings delimited in these other ways besides "string":

'string': You can delimit strings with single-quote charaters.
<string>: You can delimit strings with matching angle brackets.

single-character string escape

To include any single character literally in a string (even if the character would otherwise have some special meaning), you can prefix the character with `!' (an exclamation mark). For example, you can write `<4.3 !> 5.4!!>' to get the literal text `4.3 > 5.4!'.

Expression results as strings

You can write `%expr' to evaluate the expression expr and use the result as a string.

GASP