Re: [MiNT] -lgcc16 kludge

[Alan Hourihane <alanh@fairlite.co.uk>]

On Wed, 2010-04-07 at 15:32 +0200, Vincent Rivière wrote:
> Alan Hourihane wrote:
> > I've done this but it'd be nice to be able to test (within the build)
> > that we are using the correct libgcc.a so that people don't end up
> > linking the wrong one.
> 
> Sure, you're right.
> 
> > Is there a test that could be written and incorporated into the build to
> > catch this type of problem ?
> 
> Yes.
> 
> Here is the correct behaviour, from Cygwin:
> $ m68k-atari-mint-gcc -m68020-60 -mshort --print-multi-dir
> m68020-60/mshort
> --> PASS
> 
> Unfortunately, you have built your Gentoo GCC with an older patch when I 
> had removed the m68020-60/mshort multilib because I didn't know the 
> consequences for FreeMiNT:
> $ gcc -m68020-60 -mshort --print-multi-dir
> .
> --> FAIL
> 
> We can easily exploit the result of this command to check the compiler 
> has support for the m68020-60/mshort multilib (or any required multilib, 
> such as ColdFire).
> 
> 
> A further check can be done on the path of libgcc.a itself using the 
> --print-file-name option:
> 
> $ m68k-atari-mint-gcc -m68020-60 -mshort --print-file-name=libgcc.a
> /opt/cross-mint/lib/gcc/m68k-atari-mint/4.4.3/m68020-60/mshort/libgcc.a
> --> PASS
> 
> $ gcc -m68020-60 -mshort --print-file-name=libgcc.a
> /d/usr/m68k-atari-mint/gcc-bin/4.4.2/../../../lib/gcc/m68k-atari-mint/4.4.2/libgcc.a
> --> FAIL (should end with m68020-60/mshort/libgcc.a)

It's actually gentoo that's disabling multilib. I need to enable it
explicitly.

I'll start on that now to fix this up and release a new preview2 release
soon.

Alan.