Re: bison 1.32

[H.Merijn Brand]

On Thu 31 Jan 2002 00:17, Paul Eggert <address@hidden> wrote:
> > From: Akim Demaille <address@hidden>
> > Date: 29 Jan 2002 18:43:37 +0100
> 
> > Paul, what would you suggest?  Testing the cross-compilation code only
> > for GCC seems to make sense to me.
> 
> That seems a bit strong, as other compilers can cross-compile.
> Before doing that, I'd like to try to fix the underlying problem with
> HP-UX's C compiler, as I expect it may break other things too.
> 
> Currently the autoconf source code says this:
> 
>   # The cast to unsigned long works around a bug in the HP C Compiler
>   # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
>   # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
>   # This bug is HP SR number 8606223364.
> 
> My guess is that this known HP bug is related to the problem that
> Mr. Brand is observing.  Mr. Brand's log indicates that Autoconf is
> trying to compile a program like this:
> 
>    int main () {
>      static int test_array [1 - 2 * !(((unsigned long) (sizeof (unsigned 
> char))) >= 0)];
>      test_array [0] = 0;
>      return 0;
>    }
> 
> This is portable standard C code, but if my guess is correct, it fails
> for some reason on the HP-UX compiler.
> 
> I have three requests for Mr. Brand:
> 
> 1.  The part of the log that I saw in Akim's email actually said "<"
>     instead of ">=", but I'm guessing that a previous entry in the log
>     said ">=", as Autoconf tries that first.  Can you please verify
>     this guess?  You should be able to find something like the above
>     program in your config.log already, and config.log should already
>     report a failure for the above compilation.
> 
> 2.  Can you please verify the above program indeed fails when you
>     compile it by hand?  Please compile it as follows:
> 
>       cc -c -Ae +O2 +Onolimit +DAportable -I/pro/local/include 
> -I/usr/include/X11R6 conftest.c
> 
> 3.  Assuming the above program does not compile for you,
>     can you please try compiling the following instead?
>     Please use the same command line:
> 
>       int main () {
>       static unsigned char uc;
>       static int test_array[1 - 2 * !((sizeof uc) >= 0)];
>       test_array [0] = 0;
>       return 0;
>       }
> 
> If (3) compiles, then we can work around the HP-UX cc bugs by changing
> Autoconf to use (3)'s form.




-- 
H.Merijn Brand        Amsterdam Perl Mongers (http://amsterdam.pm.org/)
using perl-5.6.1, 5.7.1 & 630 on HP-UX 10.20 & 11.00, AIX 4.2, AIX 4.3,
     WinNT 4, Win2K pro & WinCE 2.11 often with Tk800.022 &/| DBD-Unify
ftp://ftp.funet.fi/pub/languages/perl/CPAN/authors/id/H/HM/HMBRAND/