Re: [avr-gcc-list] cannot compile arrrghh...

[Jens Bauer]

Hi Volker,

Yes, this was a bit confusing for me too, and yes the build-system appears to 
have changed a little:
gcc-4.2.4 did not need gmp/mpfr/mpc
gcc-4.3.x and 4.4.x need gmp/mpfr/mpc as binary libraries, won't accept the 
sources.
gcc-4.5.x and 4.6.x need the sources, won't accept the binaries.
-So I have 3 different cases in my build-script. ;)

You can probably leave the ABI=32 out entirely. I needed it only for 4.3.x and 
4.4.x... :)

Instead of making symbolic links, some people prefer copying the sources 
directly into gcc's source-directory, but making symbolic links works the same 
way, I have no problems anymore. =)

Try it out and see if it builds.


Love,
Jens

>On Sun 30 Oct 2011 19:58:12 NZDT +1300, Jens Bauer wrote:
>
>Hi Jens,
>
>thanks!
>
>> ln -s $source/gmp-5.0.2 $source/gcc-4.6.2/gmp
>> ln -s $source/mpfr-5.0.2 $source/gcc-4.6.2/mpfr
>> ln -s $source/mpc-5.0.2 $source/gcc-4.6.2/mpc
>
>Well if that's the case I have to laugh. Instructions said to compile
>gcc those libraries are needed, which is commonly understood as the .so,
>headers and maybe the .a being available (they are, configure would barf
>otherwise). It doesn't say "the lib sources need to be available in the gcc
>source directory" (what for? and why doesn't configure test for this if
>it's that critical?).
>
>> Furthermore, you no longer need to compile the gmp/mpfr/mpc libraries;
>that's only for gcc 4.3.x and 4.4.x!
>> You should not need --with-gmp/--with-mpfr/--with-mpc either; just the
>above mentioned symbolic links.
>
>I don't have those --with-gmp etc.
>
>Also, 4.3.3 compiles without those library sources being available, so
>unless the 4.6 build system is different I wouldn't expect this to make
>a difference, but I'll try.
>
>> It might be required for you to set ABI... I have the following on my
>PowerPC Mac:
>>
>> CC="gcc -m32"
>> $source/gcc-4.6.2/configure ABI=32
>
>The host system is 64bit, the cross compiler will still run on 64bit,
>though the target is 8bit or maybe 32bit. I'll try this too, but again
>for 4.3.3 it's not needed.
>
>Thanks for yourhelp,
>
>Volker
>
>--
>Volker Kuhlmann
>http://volker.dnsalias.net/    Please do not CC list postings to me.
>
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