-std's (was Re: v3 link failures analyzed)

[Phil Edwards <pedwards at disaster dot jaj dot com>]

On Sun, Dec 31, 2000 at 01:58:32PM +0100, Gabriel Dos Reis wrote:
> Phil Edwards <pedwards@disaster.jaj.com> writes:
> | On Sat, Dec 30, 2000 at 04:03:38PM -0600, Robert Lipe wrote:
> | > 
> | > It seems to me that the -ansi-ness of the testsuite invocation needs to
> | > match that of the autoconf invocation, but I could be talked out of that.
> | 
> | Well, they definitely need to match if the testsuite is going to run
> | on openserver, right?  I think we should be using -ansi/-std=c89 when
> | configuring and building the library when possible.
> 
> Agreed.
> 
> | Hmmm... I wonder if std=c89 has any effects on C++? 
> 
> Just for clarity: std=c90 -- even though c89 and c90 are identical.

Well, you know that, and I know that, but the compiler doesn't:

    % gcc -std=c90 ib.c
    cc1: unknown C standard `c90'
    cc1: unknown C standard `c90'
    %

We could teach the compiler that c89 and c90 are identical, as you say,
or we could just use one of the expanded forms documented in c-decl.c:

    -std=iso9899:1990      same as -ansi
    -std=iso9899:199409    ISO C as modified in amend. 1
    -std=iso9899:1999      ISO C 99
    -std=c89               same as -std=iso9899:1990
    -std=c99               same as -std=iso9899:1999
    -std=gnu89             default, iso9899:1990 + gnu extensions
    -std=gnu99             iso9899:1999 + gnu extensions

For v3 I think -std=iso9899:199409 is the closest we want.  Gaby?  Benjamin?


Phil

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