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Date: Thu, 27 Jun 2002 23:20:00 -0000
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From: Neil Booth <neil@daikokuya.co.uk>
Subject: Re: bootstrap/7143: real.c: In function `make_nan': `TFbignan' undeclared
Reply-To: Neil Booth <neil@daikokuya.co.uk>
X-SW-Source: 2002-06/txt/msg00681.txt.bz2
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The following reply was made to PR bootstrap/7143; it has been noted by GNATS.

From: Neil Booth <neil@daikokuya.co.uk>
To: John David Anglin <dave@hiauly1.hia.nrc.ca>
Cc: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org
Subject: Re: bootstrap/7143: real.c: In function `make_nan': `TFbignan' undeclared
Date: Fri, 28 Jun 2002 07:11:40 +0100

 John David Anglin wrote:-
 
 > The code below reproduces the problem.  The problem has something
 > to do with the processing of '!' and defined.  If I remove '!', then
 > defining/undefing DEC yields the correct result.
 
 OK, thanks.  I can't reproduce it, though, with the compiler that
 contains my most recent changes (2 days ago now).  See below.  The
  file bug.c is exactly as contained in your mail.
 
 > It's likely that something has been miscompiled in stage1 but the same
 > compiler bootstrapped 3.1.  It's amazing that the build of the C compiler
 > nearly completed in stage2 before a problem showed up.
 [..]
 > #define DEC 1
 > 
 > #if !defined(DEC)
 > static void enan (void);
 > #endif
 
 neil@cat:~/src/gcc/build/gcc$ ./cc1 -E /tmp/bug.c -quiet
 # 1 "/tmp/bug.c"
 # 1 "<built-in>"
 # 1 "<command line>"
 # 1 "/tmp/bug.c"
 neil@cat:~/src/gcc/build/gcc$ ./cc1 -E -traditional-cpp /tmp/bug.c
 -quiet
 # 1 "/tmp/bug.c"
 # 1 "<built-in>"
 # 1 "<command line>"
 # 1 "/tmp/bug.c"
 
 
 
 
 
 
 neil@cat:~/src/gcc/build/gcc$ ./cc1 --version
 GNU C version 3.2 20020626 (experimental) (i686-pc-linux-gnu)
 	compiled by GNU C version 3.2 20020626 (experimental).
 neil@cat:~/src/gcc/build/gcc$ 
 
 So I'm not really sure what to do.  Actually, this compiler contains
 a local change that I'm about to commit, but it only affects the
 handling of #include by the traditional preprocessor.
 
 Neil.