Re: [gentoo-user] llvm install and python_fix_shebang: EPYTHON unset

[Andrew Lowe <agl@wht.com.au>]

On 18/07/16 21:18, Andrew Lowe wrote:
> On 18/07/16 20:03, Fernando Rodriguez wrote:
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA256
>>
>> On 07/18/2016 07:19 AM, Andrew Lowe wrote:
>>> Hi all,
>>>     I'm attempting to update llvm & clang and am getting a failure.
>>> Portage is reporting:
>>>
>>>  * ERROR: sys-devel/llvm-3.8.1::gentoo failed (install phase):
>>>  *   python_fix_shebang: EPYTHON unset (pkg_setup not called?)
>>>
>>> I've looked in the ebuild and can't even find a mention of EPYTHON.
>>> I've tried:
>>>
>>> export EPYTHON=python3.5
>>>
>>> and
>>>
>>> export EPYTHON=python2.7
>>>
>>> and still the fail persists. Anyone got any thoughts on what could be
>>> going wrong?
>>>
>>>     Regards,
>>>         Andrew
>>>
>>>
>>
>> It is set on python-single-r1.eclass. What is the output of these
>> commands?
>>
>> # eselect python list
>> # emerge -vp sys-devel/llvm
>
> Fernando,
>     Thanks for the reply. Output is as follows:
>
> ****************
>
> bluey agl # eselect python list
> Available Python interpreters, in order of preference:
>   [1]   python3.5
>   [2]   python3.4
>   [3]   python2.7 (fallback)
> bluey agl #
>
> ****************
> Notice there is no asterisk indicating an "active" version as I would
> expect, like if I list opengl, opencl, ruby, binutils and others.
>
> When I noticed this, I ran python-updater and got:
>
> ****************
>
> bluey agl # python-updater
>  * Starting Python Updater...
>  * Main active version of Python:    3.5
>  * Active version of Python 2:       2.7
>  * Active version of Python 3:       3.5
>  * Globally supported Python ABIs in installed repositories:
>  *   agl:                            2.4 2.5 2.6 2.7 3.1 3.2 3.3
> 2.5-jython 2.7-jython 2.7-pypy-1.7 2.7-pypy-1.8 2.7-pypy-1.9 2.7-pypy-2.0
>  *   gentoo:                         2.4 2.5 2.6 2.7 3.1 3.2 3.3
> 2.5-jython 2.7-jython 2.7-pypy-1.7 2.7-pypy-1.8 2.7-pypy-1.9 2.7-pypy-2.0
>  *   nightmare:                      2.4 2.5 2.6 2.7 3.1 3.2 3.3
> 2.5-jython 2.7-jython 2.7-pypy-1.7 2.7-pypy-1.8 2.7-pypy-1.9 2.7-pypy-2.0
>  * No packages need to be reinstalled.
>
> ****************
>
> Pretending to run the emerge gives me:
>
> ****************
> bluey agl # emerge -vp sys-devel/llvm
>  * WARNING: The FEATURES variable contains one or more values that
>  * should be disabled under normal circumstances: keeptemp keepwork
>
> These are the packages that would be merged, in order:
>
> Calculating dependencies                      ... done!
> [ebuild     U  ] sys-devel/llvm-3.8.1:0/3.8.0::gentoo
> [3.8.0-r3:0/3.8.0::gentoo] USE="clang libffi lldb ncurses
> static-analyzer xml -debug -doc -gold -libedit -multitarget -ocaml
> -python {-test}" ABI_X86="(64) -32 (-x32)" PYTHON_TARGETS="python2_7"
> VIDEO_CARDS="-radeon" 0 KiB
> [ebuild     U  ] sys-devel/clang-3.8.1-r100:0/3.8::gentoo
> [3.8.0-r100:0/3.8::gentoo] USE="static-analyzer -debug -multitarget
> -python" ABI_X86="(64) -32 (-x32)" 0 KiB
> [blocks b      ] <=sys-devel/clang-3.8.1-r99
> ("<=sys-devel/clang-3.8.1-r99" is blocking sys-devel/llvm-3.8.1)
>
> Total: 2 packages (2 upgrades), Size of downloads: 0 KiB
> Conflict: 1 block
>
>  * IMPORTANT: 1 news items need reading for repository 'gentoo'.
>  * Use eselect news read to view new items.
>
> ****************
>
>     As the error happened during the install phase, I changed from
> "emerge...." to "ebuild llvm install". When this runs, the first line
> that is output is the following:
>
> python-exec: EPYTHON value invalid (/usr/bin/python2.7).
>
>     Anything else you need?
>
>     Regards,
>         Andrew

	I have no idea as to why, but I've just rerun the install and it now 
works, llvm is installed. Since my original post I reran "emerge 
eselect-python", as to whether that fixed the problem I have no idea.

	Fernando, thanks for the feedback,

		Andrew