Possible fix for Perl failing with ../lib/auto/POSIX/POSIX.so: Undefined symbol "__flt_rounds" on ARM

[Ian Lepore]

On Tue, 2012-06-05 at 17:09 +0200, Jan Sieka wrote:
> Hello Ian!
> 
> I tried recently to compile and run Perl 5.12 on ARM (SheevaPlug) using
> HEAD from 22.05.2012 and got the following error while trying to run:
> /usr/ports/lang/perl5.12 # make test
> [...]
> ../lib/auto/POSIX/POSIX.so: Undefined symbol "__flt_rounds
> [...]
> 
> After investigating the issue it appeared that __flt_rounds symbol is
> not exported by libc. Applying the following patch, recompilling world
> and Perl fixed the problem and allowed to use Perl on SheevaPlug:
> 
> diff --git a/lib/libc/arm/Symbol.map b/lib/libc/arm/Symbol.map
> index e8c7f1d..8cdcdaf 100644
> --- a/lib/libc/arm/Symbol.map
> +++ b/lib/libc/arm/Symbol.map
> @@ -70,6 +70,7 @@ FBSDprivate_1.0 {
>         __divdf3;
>         __floatsisf;
>         __floatsidf;
> +       __flt_rounds;
>         __fixsfsi;
>         __fixdfsi;
>         __fixunssfsi;
> 
> Can you comment whether this is a correct solution?
> 
> Best regards,
> 
> Jan Sieka

It looks correct to me, except that I don't know the conventions for
adding symbols and which version/section a symbol goes into.  That is, I
don't know when you add a symbol to an existing _1.0 section versus when
you have to create a new version section.

-- Ian