Path: utzoo!telly!attcan!dptcdc!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!CS.UTAH.EDU!caeco!jj
From: caeco!jj@CS.UTAH.EDU (Jeff Jennings)
Newsgroups: gnu.gcc.bug
Subject: Bug in C preprocessor
Message-ID: <8903271852.AA16332@sol.systems.com>
Date: 27 Mar 89 18:52:07 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 30

I have found what I believe to be a bug in cpp version 1.34.
The problem is that macros are not expanded if they appear
as operands to the concatenation operator.  The configuration
is "config.gcc sun3".

$ cat bug.c
#define PREFIX abc_
#define XYZ(name) PREFIX ## name()

main ()
{
	XYZ(func);
}
$ gcc -v -E bug.c
gcc version 1.34
 /usr/local/lib/gcc-cpp -v -undef -D__GNUC__ -Dmc68000 -Dsun -Dunix -D__mc68000__ -D__sun__ -D__unix__ -D__HAVE_68881__ -Dmc68020 bug.c
GNU CPP version 1.34
# 1 "bug.c"



main ()
{
	PREFIXfunc() ;
}
--------
Jeff Jennings		Silicon Compiler Systems
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