Re: Crosscompiling C++ for powerpc64le fails

[Danny Milosavljevic <dannym@scratchpost.org>]

[-- Attachment #1: Type: text/plain, Size: 1125 bytes --]

Hi Tobias,

On Tue, 28 May 2019 18:07:02 +0200
Tobias Platen <trisquel@platen-software.de> wrote:

> Im trying to cross compile basic GNU software such as bash and coreutils
> for powerpc.
> 
> When building mpfr the build fails using the message above. I guess I
> have to specify the include paths for glibc to the configure script,
> since headers won't be found in /usr/include

We have a special Guix-specific patch for gcc which makes it heed these
environment variables:

* CROSS_C_INCLUDE_PATH
* CROSS_CPLUS_INCLUDE_PATH
* CROSS_LIBRARY_PATH

Try printing and/or setting those.

gnu/packages/cross-base.scm already contains a SEARCH-PATHS form in CROSS-GCC
which sets up the environment variables CROSS_LIBRARY_PATH,
CROSS_C_INCLUDE_PATH, CROSS_CPLUS_INCLUDE_PATH, CROSS_OBJC_INCLUDE_PATH,
CROSS_OBJCPLUS_INCLUDE_PATH, so it should have worked--but didn't.

That still leaves the libc.  Not sure how it gets included in the environment
variables above.

See gnu/packages/admin.scm's sunxi-tools for a horrible workaround that
makes it work fine.

We should probably fix this problem.

[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 488 bytes --]