Re: to Simon Wright, re Mac OS X builds

[Luke A. Guest <laguest@archeia.com>]

Simon Wright <simon@pushface.org> wrote:
> Lucretia <laguest9000@googlemail.com> writes:
> 
>> I'm trying to replicate your build of 6.1.0 for mac so I get an
>> understanding of the build process on Mac. Problem is, it's
>> failing. There must be more than what you are telling going on on your
>> platform.
> 
>> checking how to run the C++ preprocessor... /lib/cpp
>> configure: error: in `/Users/laguest/gcc/build/gcc-6.1.0/gmp':
>> configure: error: C++ preprocessor "/lib/cpp" fails sanity check
>> See `config.log' for more details
> 
> I replied to this by mail, perhaps you didn't see it.

Ive been checking here, I need to change the email address used by google I
think. Plus if it's here, it's archived.

> I couldn't reproduce the problem; maybe I made some change which is
> still there. I don't have any notes about it, but if I did have this
> problem I would have started looking in config.log.

Yeah I did.

> This message comes from gmp/configure:10323. Why it's looking for
> /lib/cpp I don't know (/lib doesn't exist); it should be using "g++ -E".

Yea, but if you look , it tries two variations of the above then /lib/cpp.
Not sure if that's a mac specific thing, I think it is, need to check the
actual configure script.  If so this needs a patch i think to call xcrun
instead, but then I don't know if this is supposed to used apple's cop or
the GCC one from the cross compiler you provided.

Did you build gmp, mpc, mpfr and isl with apple's tools or with GCC? Did
you just link in the firs into the GCC root dir?