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Re: bug#13342: Errors trying to build Guile 2.0.7

From: Andy Wingo
Subject: Re: bug#13342: Errors trying to build Guile 2.0.7
Date: Tue, 22 Jan 2013 14:01:43 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.2 (gnu/linux)

On Sat 19 Jan 2013 05:42, Peter Teeson <address@hidden> writes:

>     bad return from expression `(f-sum -1 2000 -30000 40000000000)':
>     expected 39999971999; got 39999972255
>     FAIL: test-ffi
> There are 2 compilers available from Apple for C/C++ 
> i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build
> 5658) (LLVM build 2336.1.00)
> Apple clang version 3.0 (tags/Apple/clang-211.12) (based on LLVM 3.0svn)

IIRC rebuilding libffi with a different compiler helps.  But I don't
recall.  Perhaps Hans Aberg recalls?

> I built guile-2.0.7 using the default configure/make and have 2
> questions:
>    (a) How can I find out which compiler/linker combo is used?

Look at your config.log.

>    (b) How can I change to use the other one? (If that's
> the right place to make the change)

./configure ... CC=/path/to/different/cc



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