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From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: avr-gcc
Date: Fri, 15 Apr 2016 23:10:45 +0200
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In-Reply-To: <878u0fs38f.fsf@drakenvlieg.flower> (Jan Nieuwenhuizen's message
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To: Jan Nieuwenhuizen <janneke@gnu.org>
Cc: Andy Wingo <wingo@pobox.com>, "guix-devel@gnu.org" <guix-devel@gnu.org>

Jan Nieuwenhuizen <janneke@gnu.org> skribis:

> Except for packages that need a native gcc to build tools during build
> time (CC_FOR_BUILD).  For such packages (like Bash or Guile),
> standard-packages must include gcc again.  Then, the build recipe's
> phases must be changed so that when cross compiling, the
> C_INCLUDE_PATH is moved into CPATH and C_INCLUDE_PATH is unset.
> That makes this solution even more unattractive, many changes
> to package recipe's could be needed.

Right!  That is really a bug, and I wonder why we didn=E2=80=99t catch it b=
efore
(maybe because the libc=E2=80=99s are pretty much the same in the systems we
were targeting?).

I had actually worked around it in
e8e2e18b84eb8842a59be9bf7d49bb672260ae3a in one particular case.

So the fix, as you suggest, is (1) to change
gcc-cross-environment-variables.patch to CROSS_ify the other environment
variables as well, and (2) to remove the unsetenv that was added in
e8e2e18b84eb8842a59be9bf7d49bb672260ae3a.

Could you give it a try?  :-)

Thanks for taking the time to explain!

Ludo=E2=80=99.