OK in your config.log I see the following:
/home/adam/Downloads/sage-8.0.beta1/local/var/lib/sage/installed/python2-2.7.13.p0: Permission denied

In any case, I should have spotted it earlier, that's not where python is supposed to be. It looks like someone set PYTHON=/home/adam/Downloads/sage-8.0.beta1/local/var/lib/sage/installed/python2-2.7.13.p0 (from forensic on config.log)
before starting to build brial. Of course that file is not an executable
which is why we have permission denied.
The correct value should be
/home/adam/Downloads/sage-8.0.beta1/local/bin/python
but you shouldn't need to set it.

Francois

On 13/04/17 13:48, Adam Webb wrote:


On Wednesday, 12 April 2017 19:01:40 UTC-6, François wrote:

    Can you send the config.log file from
    local/var/tmp/sage/build/brial-0.8.5/src/?
    François

    > On 13/04/2017, at 12:20, Adam Webb <[email protected]
    <javascript:>> wrote:
    >
    >
    > Hi,
    >
    > I don't know if my set-up is somehow different but I have a
    problem while building installing brial. This occurs with 7.6 as
    well as 8.0 beta.1
    >
    > During the check stage I get the following.
    >
    > [brial-0.8.5] checking whether
    /sage-8.0.beta1/local/var/lib/sage/installed/python2-2.7.13.p0
    version is >= 2.7... no
    > [brial-0.8.5] configure: error: Python interpreter is too old
    > [brial-0.8.5] Error configuring BRiAl
    >
    > It claims that my python 2.7.13 is too old.
    >
    > I am using Ubuntu 16.04.2 LTS
    >
    > Adam
    >
    >
    > On Thursday, 6 April 2017 13:55:55 UTC-6, Volker Braun wrote:
    > As always, you can get the latest beta version from the "develop"
    git branch. Alternatively, the self-contained source tarball is at
    http://www.sagemath.org/download-latest.html
    <http://www.sagemath.org/download-latest.html>
    >
    >
    >
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