A non-feature in the GNU C Preprocessor

[Ronald F. Guilmette]

It would be really nice/helpful if normal preprocessing token replacement
were applied, by the C preproceessor, to #pragma directives.

For example, given the input file:

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#define foobar stdio

#pragma depends_on foobar.h
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If this file is processed with "gcc -E', it would be nice if the
output generated said:

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# 1 "testprag.c"


#pragma depends_on stdio.h
-------------------------------------------------

Rather than:

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# 1 "testprag.c"


#pragma depends_on foobar.h
-------------------------------------------------