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Message-ID: <53C468CE760F4891A29B8D8C32A238D5@Paullaptop>
From: "Paul Edwards" <mutazilah@gmail.com>
To: "Ulrich Weigand" <uweigand@de.ibm.com>
Cc: "Ian Lance Taylor" <iant@google.com>, 	<gcc@gcc.gnu.org>
References: <200910051315.n95DF2Gd023159@d12av02.megacenter.de.ibm.com>
In-Reply-To: <200910051315.n95DF2Gd023159@d12av02.megacenter.de.ibm.com>
Subject: Re: i370 port - constructing compile script
Date: Mon, 19 Oct 2009 14:19:00 -0000
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> .../configure --target=i370-mvs --prefix=... --with-sysroot=...  \
>               --enable-languages=c
>
> where prefix points to the directory where the cross-compiler
> should be installed, and sysroot points to the directory where
> the MVS libraries and header are installed.

Ok, I used

../configure --target=i370-mvspdp --prefix=/devel/mvscross --with-sysroot=/devel/mvshead 
 --enable-languages=c

plus make and make install

then I went to

mvscross/bin and renamed i370-mvspdp-gcc to i370-mvspdp-xxx

and replaced it with a script that does:

i370-mvspdp-xxx -S $*

> For step 3 (cross-building a native compiler), you'd need
> something along the lines of
>
>  .../configure --build=i686-linux --host=i370-mvs --target=i370-mvs \
>                --prefix=... --with-build-sysroot=... --enable-languages=c

./configure --build-i686-linux --host=i370-mvspdp --target=i370-mvspdp --prefix=/devel/mvshost 
 --with-build-sysroot=/devel/mvshead --enable-languages=c

I wasn't sure if that --with-build-sysroot was right - pointing to
the same headers, but couldn't think of anything else to do with it!

> This configure run will then use the i370-mvs-gcc cross-compiler
> you built in step 2 in order to detect MVS host properties.

Ok, it (3.4.6 I am using) got as far as:

checking size of void *... configure: error: cannot determine a size of void 
*
make: *** [configure-gcc] Error 1

I haven't had a chance to investigate what it's trying to do there, to
see if I can devise a workaround.

I know that it seems to try to compile with "-g" all the time which
gives a warning about it not being supported, but I don't think
warnings produce bad return codes like that.

BFN.  Paul.