Re: [gentoo-science] Question before setting up sage-on-gentoo

[JC D <mail2jcdx@yahoo.de>]

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Hi,here are the first results. It did not work so far because I found my gcc-4.7.3 on gentoo_prefix (Mac OS 10.10) is broken. emerge gcc works and installs but if I try to compile a simple hello.cpp I get a segmentation fault 11. I am using the new binutils-apple-6.1. So far it seems that I can not get a newer gcc and thus also no llvm or any other package that asks for a more recent gcc. Right now I get a working basic system but almost all "higher" application fail to build one or the other way.

Now I try to get llvm/clang working. For the compilation I am going to use the native llvm-gcc and llvm-g++ from Mac. 
I set up a package.env for llvm with:sys-devel/llvm llvm.conf
llvm.conf contains:CC=/usr/bin/llvm-gcc
CXX=/usr/bin/llvm-g++

The compilation works but there is an error when writing the llvm files to the right path. Here are emerge --infoshow at bpaste 
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| show at bpastePortage 2.2.14-prefix (python 3.3.3-final-0, prefix/darwin/macos/10.10/x64, gcc-4.2.1, unavailable, 14.1.0 x86_64)==================================... |
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| Auf bpaste.net anzeigen | Vorschau nach Yahoo |
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and the log file https://bpaste.net/show/62a0d5b0d4f4
I will experiment further ... 
 
 

     François Bissey <frp.bissey@gmail.com> schrieb am 18:45 Montag, 26.Januar 2015:
   

 Hi,

Well that would be an interesting experiment. You may have to limit yourself
to gcc 4.7.x, I haven’t been able to get 4.8 to compile and I think that the old
binutils is too blame. For env you could set CC CXX F77 and FC with the
appropriate x86_64-apple-darwin14-{gcc,g++,gfortran}-4.7.3 value.
I would be interested in your experience if you decide to go ahead.

François
> On 27/01/2015, at 02:42, JC D <mail2jcdx@yahoo.de> wrote:
> 
> Hi!
> I want to install sage-on-gentoo using gentoo_prefix on a Mac OS 10.10.
> My first try was not successful and it seems it was related to the "kind of outdated" gcc-apple compiler that is originally used in gentoo_prefix on Mac.
> I have a question: Would it be possible to install a more recent gcc such as gcc-4.8 (as soon as it is unmasked) and then build the whole sage-on-gentoo with this compiler, but keeping the rest untouched?
> And how could I do this? Would it be possible to set up layman using the gcc-4.8 for everything in the overlay or could I use /etc/portage/env for that? 
> Best regards from a newbie
> 



   

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