Re: [Boost-users] [build] cannot specify different version of gcc

Subject: Re: [Boost-users] [build] cannot specify different version of gcc
From: Brodie Thiesfield (brofield2_at_[hidden])
Date: 2010-11-07 21:21:10

I'll simplify the question in order to try again for help.

I have found that the only way I can force boost 1.44.0 to build on
linux using a version of gcc installed as /usr/bin/gcc44 is to create
a symlink of gcc -> /usr/bin/gcc44 on the path. This can't be right.

Can anyone tell me how to specify an alternate compiler? See below for
the methods (from the documentation) that I have tried and found to
not work.

Regards,
Brodie

On Mon, Nov 1, 2010 at 8:21 AM, Brodie Thiesfield
<brofield2_at_[hidden]> wrote:
> Hi,
>
> I'm trying to build boost on CentOS 5.5 using the /usr/bin/gcc44
> compiler and I'm running into difficulties with documentation not
> fitting reality. How do I make this work?
>
> What I've tried...
>
> Note: I've removed /usr/bin/gcc and /usr/bin/g++ to force errors when
> gcc44 and g++44 are not used.
>
> Using ./bootstrap.sh
> Building Boost.Jam with toolset ... tools/jam/src/###
> ### No toolset specified. Please use --toolset option.
>
> Setting CC=/usr/bin/gcc44 and CXX=/usr/bin/g++44 (note that this won't
> work if gcc and g++ exist because then it will default to the gcc
> toolkit and not the gcc-4.4 toolkit that I want). This builds a number
> of things (looking at the bootstrap.log) but still gives the following
> error. Ignoring the error and calling ./bjam then fails.
> Building Boost.Jam with toolset ... tools/jam/src/###
> ### No toolset specified. Please use --toolset option.
>
> Using ./bootstrap.sh --toolset=gcc gives an error:
>   unrecognized option: --toolset=gcc
>
> Using ./bootstrap.sh --with-toolset=gcc gives an error:
> Building Boost.Jam with toolset gcc...
> Failed to build Boost.Jam
> -> bootstrap.log shows that it is trying to build with gcc, which
> doesn't exist, therefore error.
>
> Using ./bootstrap.sh --with-toolset=gcc-4.4 gives an error:
> Building Boost.Jam with toolset gcc...
> Failed to build Boost.Jam
> -> bootstrap.log shows ### Unknown toolset: gcc-4.4
>
> Creating ~/user-config.jam as:
>  import toolset.using ;
>  using gcc : 4.4 : g++44 ;
>
> export BOOST_USER_CONFIG=~/user-config.jam
>
> Then calling the same ./bootstrap.sh command lines above show no difference.
>
> How in the world do I get this thing to use /usr/bin/gcc44 and
> /usr/bin/g++44 to compile?
>
> I think that I'm going to have to create local links ./gcc ->
> /usr/bin/gcc44 and add the current directory to the path just to get
> this to build the way that I want it to. This seems crazy.
>
> Regards,
> Brodie
>