"warning: preprocessor directive not recognised within macro arg"(fwd)

[Mo McKinlay <mmckinlay at labs dot interopen dot org>]

Hi folks,

I've been compiling the Open Look libraries for Linux (xview-3.2p1), and
ran up against the above warning followed by "unmatched #ifdef" errors.

I can fix the sources, no problem, but I was wondering if there was any
plans to support preprocessor directives within macro expansions? For
example:

#define xstrncpy(a, b, n)   strcpy(a, b)

void myfunc(char *a) {
	xstrcpy(a,
#ifdef SOME_OPTION
		some_function(),
#else
		"Some text",
#endif
		n);

With gcc 2.95.2, compilation would fail with:

bug.c:8: warning: preprocessor directive not recognised within macro arg
bug.c:8: warning: preprocessor directive not recognised within macro arg
bug.c:8: unbalanced #endif

Just to clarify, I know the sources can be fixed easily, I was merely
wondering if there are any plans to make this work without requiring
source changes. I've not tried development snapshots, so I have no idea
about the state of this "feature" in newer releases :-)

Many thanks.

-- 
Mo McKinlay                                T: +44 (0) 709 22 55 05  x1
Chief Software Architect                   F: +44 (0) 709 22 55 05  x3
inter/open                                 E: mmckinlay@labs.interopen.org
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