Re: FW: Help with crossgcc and an embedded system!

[Vincent Rubiolo <vincent dot rubiolo at st dot com>]

Linker script and ctr0 pb.
Read on Bill's instructions to reach the FAQ. It is explained inside.
I also think that since you are using embedded systems, you may provide your own linker script to 
fully control what happens.

Good luck in your experiments,

Vincent

murphyn@microsense.co.uk wrote:

> Hi Vincent,
>
> 	Thanks that done it lovely! I'll have to write myself a script just incase 
> I need to do it again. Just one small problem though
>
>  Built a simple file, pretty boring really, countGPIO.c
>
>
>  But got some problems......
>
>
>  I know _start is the first op code(low level) to be executed, this is part 
> of crt0.o I think. __main must be the start of the main executable C 
> program. Any ideas, probably just forgot to include something?
>
>  Thanks
>
>  Nigel.
>
> PS Vincent - I must give you a double thankyou, thanks for your time.
>
>
>
>
> -----Original Message-----
> From:	Vincent Rubiolo [SMTP:vincent.rubiolo@st.com]
> Sent:	12 June 2003 13:24
> To:	murphyn@microsense.co.uk
> Subject:	Re: FW: Help with crossgcc and an embedded system!
>
> Yo,
>
>
> > Vincent,
> >
> > This is how i done it.
> >
> > cd
> > mkdir build-crossgcc && cd build-crossgcc
> >
> > (I then copied in the tarballs using Xwindows to build-crossgcc 
>
> directory)
>
> > mkdir build-binutils
> > mkdir build-gcc
> > mkdir build-newlib
> > export TARGET=i486-none-elf
>
> A short point. Where did you get that target? If i look at the 
> configuration page in gcc dir, I
> can't find it (gcc-3.3/gcc/doc/configure.html)
>
>
> > export PREFIX=/usr/local
> > export PATH=${PERFIX}/bin:${PATH}
> >
> > (I Then decompressed the tarballs in xwindows instead of using 'tar xzvf 
> > ....' )
>
> I suppose you mean with a graphical tool such as fileroller (gnome) or arc 
> (kde)
>
>
> > cd build-binutils../binutils-2.13/configure --target=$TARGET
> > --prefix=$PREFIX
> > make all install 2>&1 | tee make.log
> > cd ..
> > cd build-gcc
>
> BEGIN OF CHANGE 1 (see below)
>
> > ../gcc-3.3/configure --target=$TARGET --prefix=$PREFIX --with-newlib
> > --without-headers --with-gnu-as --with-gnu-ld --disable-shared
> > --enable-languages=c
> > make all-gcc install-gcc 2>&1 | tee make.log
>
> END OF CHANGE 1
>
> > cd..
> > cd build-newlib
> > ../newlib-1.11.0/configure --target=$TARGET --prefix=$PREFIX
> > make all install 2>&1 | tee make.log
> > cd..
>
> BEGIN OF CHANGE 2
>
> > cd build-gcc && rm -rf *
> > ../gcc-3.3/configure --target=$TARGET --prefix=$PREFIX --with-gnu-as
> > --with-bnu-ld --enable-languages=c,c++
>
> Typo     ^          . I supppose you typed right on the command line
>           |
>         here
>
> END OF CHANGE 2
>
>
> > make all install 2>&1 | tee make.log
> >
> > I'll try and find what happen to sed.
> >
> > Nigel.
>
>
> Here is my suggestion. Instead of doing a two-pass configure, replace the 
> two change blocks by the
> following (modify PATH_OF_NEWLIB to suit your needs)
> CHANGE 1
>   ../gcc-3.3/configure --target=$TARGET --prefix=$PREFIX --with-newlib
>   --with-headers=PATH_OF_NEWLIB/newlib/libc/include --with-gnu-as 
> --with-gnu-ld --disable-shared
>   --enable-languages=c,c++
>   make all-gcc install-gcc 2>&1 | tee make.log
> END OF CHANGE 1
>
> CHANGE 2
> cd build-gcc
> make all install 2>&1 | tee make.log
> END OF CHANGE 2
>
>
> This copies the headers of newlib in gcc dir and do the build straight 
> ahead. The second pass (with
> no configure) just builds what remains to be built (mainly libraries) after 
> newlib has been set up.
> BE WARNED: this may lead to not-working tools. They do work for me, but I 
> have not tested things
> such as c++ nor run the dejagnu testsuite on it
>
> This my own recipe, hopes that helps. Tell me if it works for you
>
> Regards,
> Vincent
>
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