[Buildroot] gcc-error with latest buildroot

[Michael S. Zick <minimod@morethan.org>]

On Sat December 26 2009, Marco Glatz wrote:
> Am Samstag, 26. Dezember 2009 15:08:53 schrieb Michael S. Zick:
> > On Sat December 26 2009, Marco Glatz wrote:
> > > hello,
> > >
> > > i'm trying to make a toolchain using latest buildroot, but when compiling
> > > gcc i get this error:
> > >
> > > checking for correct version of gmp.h... yes
> > > checking for correct version of mpfr.h... no
> > 
> > This problem shipped in 2009.11 also -
> > Fails even if mpfr is put into the GCC tree -
> > 
> > Looks like it might be tied in with the logic of building Fortran -
> > (GCC once only used mpfr on the Fortran builds).
> > Haven't had time for further testing myself.
> > 
> > There is what might be a related bug report already posted.
> 
> 
> hi,
> 
> this helped me out:
> 
> http://www.linuxquestions.org/questions/linux-from-scratch-13/i-have-an-error-
> building-gcc-requires-gmp-4.1-and-mpfr-2.3.0.-690426/
> 
> so i put  gmp and mpfr directories in the gcc-folder in the output/toolchain-
> directory. then it compiled. later when linking there were a lot of errors not 
> finding gmp-related functions, so i put again mpfr and gmp in output/build/gcc-
> x-x-target directory. but that didn't help, still getting lot of undefined 
> reference to __gmpz_* functions.
> 
> all the pages i found on google said you should configure --with-mpfr=... and 
> --with-gmp=....., and there are options fpr this in the makefiles, but they do 
> net get filled.
>

When I looked at it a month or so ago (prior to 2009.11 release) -
It looked to me as if filling those options where conditionalized
based on building Fortran.  But I have about zero Makefile knowledge.

Try enabling Fortran compiler in the build, it might "just work".

The Buildroot project uses a "tag-it, forget-it and move-on" release cycle;
they aren't staffed to support anything like a mission-critical,
stable release, version of Buildroot.
 
Mike
> 
> marco
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