Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!ATHENA.MIT.EDU!wesommer
From: wesommer@ATHENA.MIT.EDU (Bill Sommerfeld)
Newsgroups: comp.sys.apollo
Subject: Re: Internal cpp in /usr/lib/cc != /usr/lib/cpp
Message-ID: <8808240139.AA02024@OLIVER.MIT.EDU>
Date: 24 Aug 88 01:39:40 GMT
References: <15428@shemp.CS.UCLA.EDU>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 22

MH6.5 is in error.

The `Reiser' cpp (/usr/lib/cpp or /lib/cpp) happens to expand macros
and macro arguments inside quoted strings, but this is not something
which can be depended upon.

The draft proposed ANSI C standard, which is (partially) implemented
by /com/cc, specifies that the preprocessor should NOT expand macros
or macro arguments inside quoted strings.  If you look at other ANSI
compilers (GNU CC is a good example), you will find the same behavior,
although there may be some way to revert to the old, broken
"reiserisms".

To have source which will work with all C compilers, change the macro
to:

	#define grot(x) case x: *dp++ = x; break;

and all invocations of it to:
	grot('n')

			Bill Sommerfeld
			Apollo Computer/MIT Project Athena