🚀 go-pugleaf

Hi there !

This one hit me rather badly over the weekend, now is this a bug or
a feature of GCC 2.3.3 ??

The expansion of SINGLE qouted macro arguments differs between sun-cc
(or gcc with -traditional set) and gcc !

For example most ioctl calls in SunOS 4.x are implemented with the following
macro:

#define _IOR(x,y,t)     (_IOC_OUT|((sizeof(t)&_IOCPARM_MASK)<<16)|('x'<<8)|y)
	     ^							   ^^^

The marked parameter is expanded differently when compiling with and without
'-traditional'. This behaviour might be correct, however Sun includes
(especially the macro shown) depend on the expansion of single-qouted
parameters. According to K&R 2nd ed. (page 230):
'... each argument is substituted for each unquoted occurence of the
corresponding parameters identifier ...'. Now what does 'unqouted' mean,
single quotes (') or double quotes (") or both (this is what GCC implements)
???

Puzzled,

Klaus

-- 
Klaus Kaempf                 E-Mail: kkaempf@didymus.rmi.de
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