Re: [hatari-devel] mingw-w64

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

On 26/09/2013 11:06, Christer Solskogen wrote:
> On Thu, Sep 26, 2013 at 12:07 AM, Nicolas Pomarède
> <npomarede@xxxxxxxxxxxx> wrote:
>
> > I changed Toolchain-mingw32.cmake a little to allow changing the mingw's
> > values using cmake -D parameters, instead of editing the file.
> >
> > In your case, you would use for example :
> > -DMINGW_EXE_PREFIX=x86_64-w64-mingw32 -DMINGW_ROOT_PATH=i686-w64-mingw32
>
> Cool, but I think you only need to set one variable. The system should
> be able to figure out the rest it self.
> I mean, the setting over is meaningless since it will use a 64bit
> compiler with a sysroot that contains 32bit libraries.

I don't see how the system can find MINGW_ROOT_PATH ; in my case and in 
most distribs it's "mingws", in your case it's i686-w64-mingw32. We can 
maintain a list of all possible directory variations that go under 
"sysroot/". Patch welcome if you have one.

> Then the distributions are wrong. You only need that mingw symlink
> when building the cross compiler, not for using it.
> The i686-w64-mingw32 (and x86_64-w64-mingw32) are very standard when
> using i686-w64-mingw32 or x86_64-w64-mingw32 as a target for binutils
> and gcc.
> Note that they are only standard for mingw-w64, they are not standard
> for building other targets.

I don't say the distributions are needing a symlink, I say that I looked 
at Fedora, suse, mandriva, mageia and a few other and they all use 
something like :

/usr/i586-pc-mingw32/sys-root/mingw/
or /usr/i686-w64-mingw32/sys-root/mingw
or /usr/x86_64-w64-mingw32/sys-root/mingw

I wouldn't go as far as to say that all distribs are wrong :)

I don't see the point of having "mingw/" named as "i686-w64-mingw32/" 
for example, since this directory is already under 
"/usr/i686-w64-mingw32/", so it's redundant.

So I would say that if all library specific (bin/, lib/, include/) are 
always under "sys-root/mingw", then we can indeed have only one variable 
for the toolchain file to choose the mingw version. If like in your case 
the dir name under sys-root is not mingw, then we need another variable 
to select it.

Also, Hatari build system should try to accomodate to what most distribs 
provide to ease compilation and inclusion of Hatari in such distribs 
(especially when they all provide the same directory hierarchy in that 
case). More advanced users who use their own tools will have no problem 
adjusting their settings.

Nicolas