Re: Updating powerpc-crosscompile environment from gcc-2.95.3

[Frank Beesley <frank.beesley@aeroflex.com>]

Lets take one step back - take a look at Kimmo Mustonen's original message:

-------
./configure --target=powerpc-linux --prefix=/tmp/cross --nfp
make TARGET_CONFIGDIRS=
make install
PATH=/tmp/cross/bin:$PATH
export PATH
cd /tmp/cross/src
bzip2 -dc /m/nfs/data/readwrite/sipo-external/gcc-4.0.2.tar.bz2 \
    | tar -xf -
mkdir -p gcc-4.0.2-obj
cd gcc-4.0.2-obj
../gcc-4.0.2/configure --target=powerpc-linux --with-cpu=603e --nfp \
    --prefix=/tmp/cross --enable-shared --enable-languages="c" \
    --with-newlib --disable-threads
make TARGET_CONFIGDIRS=
-------

So we both have just built and installed a new binutils (2.16 for Kimmo, 
2.15 for me) using a native gcc (2.95 for Kimmo, 3.2.2 for me) and we 
are now trying to build the first-stage gcc cross-compiler (4.0.2 for 
Kimmo, 4.0.1 for me). My suggestion to Kimmo was to change his gcc 
configure to remove enable-shared and replace it with disable-shared. 
Because of this change I am able to get further through the first-step 
gcc cross-compiler build - though is does not successfully complete.

After I run the gcc configure I run make to build the gcc cross 
compiler. This is what is failing with the message that it cannot create 
executables - this is from within the make script, and yes I understand 
that the "compiler" is not who actually makes the "executable". I have 
also tried setting my path to $PREFIX/$TARGET/bin:$PATH to point at the 
newly built tools but the configure for gcc fails when I do this. So 
still have not figured out the right combination to build the gcc cross 
compiler. I cannot successfully run "make install-gcc" because I cannot 
build gcc for the powerpc-motorola-linux target.

Thanks
Frank




Kai Ruottu wrote:

> Frank Beesley wrote:
>
>> "../gcc-4.0.1/configure --prefix=$PREFIX --target=$TARGET 
>> --disable-nls --disable-shared --enable-languages=c --without-headers 
>> --with-newlib"
>>
>> "make"
>>
>> I get farther then the message you have but it still fails with:
>> checking for powerpc-motorola-linux-gcc...  
>> /rpm/ppc/build/gcc/gcc/xgcc -B/rpm/ppc/build/gcc/gcc/ 
>> -B/opt/ppc/powerpc-motorola-linux/bin/ 
>> -B/opt/ppc/powerpc-motorola-linux/lib/ -isystem 
>> /opt/ppc/powerpc-motorola-linux/include -isystem 
>> /opt/ppc/powerpc-motorola-linux/sys-include
>> checking for C compiler default output file name... configure: error: 
>> C compiler cannot create executables
>
>
>  What do you think being required for "creating executables" ?  If you
> know this quite basic thing about "C compilers", then you also know why
> it cannot create them !
>
>  In the GCC world, "creating executables" is very far from "compiling",
> but in the Windoze MSVC, BCC etc. cases "compiling" is considered being
> just the same thing as "creating executables" !
>
>  So, believe me or not, this error message is really misleading or just
> a fact in the GCC world: A "C compiler" never creates executables there,
> it doesn't even "create objects", one needs an assembler from the GNU
> binutils or some "native 'as'" for this task... What kind of tool
> creates executables and what kind of components will be required
> additionally with the "compiled & assembled" object created from the
> "hello world" C source, will be leaved to you as a homework to find
> out...
>
>  In your case I would try writing :
>
>    make install-gcc
>
> and then try "compiling" a Hello World in order to see what happens:
>
>    powerpc-motorola-linux-gcc -v -O2 -o hello-test hello.c
>
> Can it create this 'hello-test' executable at all?  What very obvious is
> still missing
>