Ok. I have had a really hard time finding a solution. I have found many
posts claiming that it is possible to pre-compile modules, but very few
posts that actually try to help you do it. That said, I think I have pieced
together some of the steps:
--------------------------
$ cd /usr/share/julia/base
$ sudo vi userimg.jl # Insert lines like require("PyCall")
$ sudo julia --build ../usr/lib/julia/sys0 sysimg.jl
...
Cannot open system image file "../usr/lib/julia/sys0.ji" for writing.
--------------------------
This obviously fails because ../usr does not exist. There is no file in my
system (Ubuntu) called sys9.ji but there are files called
/usr/lib/x86_64-linux-gnu/julia/sys.so
/usr/lib/x86_64-linux-gnu/julia/sys.ji
After backing up /usr/lib/x86_64-linux-gnu/julia/, I tried the command
$ sudo julia --build /usr/lib/x86_64-linux-gnu/julia/sys sysimg.jl
This gave no compile-time errors, but now Julia dies with a seg fault:
$ julia
zsh: segmentation fault (core dumped) julia
This happens even if userimg.jl has nothing bug comments... I can recover
Julia from the backup, but if anyone can see an obvious error that I can
just fix, I would like to hear it.
Cheers,
Daniel.
On 24 October 2014 15:59, Isaiah Norton <[email protected]> wrote:
> It is not strictly necessary to build from source - try searching this
> list for "sysimg" and look for the "--build" incantation for PPA installs
> (I'm pretty sure it has come up before).
>
>
>
> On Fri, Oct 24, 2014 at 9:53 AM, Daniel Carrera <[email protected]>
> wrote:
>
>> Oh, and I now figured out why I can't get Julia to pre-compile the
>> modules I want. Apparently you have to be building it from source...
>>
>> Now I'll go and give that a try.
>>
>> Cheers,
>> Daniel.
>>
>>
>>
>> On Friday, 24 October 2014 15:47:58 UTC+2, Daniel Carrera wrote:
>>>
>>> Yes, it seems to work. Apparently my Julia directory is
>>> "/usr/bin/../share/julia/base/", so that's one problem solved. Thanks!
>>>
>>> Cheers,
>>> Daniel.
>>>
>>> On 24 October 2014 14:53, Till Ehrengruber <[email protected]> wrote:
>>>
>>>> You cuold look where your julia base library is located for example by
>>>>
>>>> functionloc(push!)
>>>> ("/usr/local/Cellar/julia/0.3.1/bin/../share/julia/base/array.jl",464)
>>>>
>>>>
>>>> I'm on OS X but it should work on Ubuntu as well
>>>>
>>>> Am Freitag, 24. Oktober 2014 14:31:32 UTC+2 schrieb Daniel Carrera:
>>>>>
>>>>> Hello,
>>>>>
>>>>> I am running Ubuntu with Julia 0.3.1 installed from PPA. I want to
>>>>> figure out where my Julia base directory is so I can create a userimg.jl
>>>>> file so I can pre-compile some modules that I use often. I got the
>>>>> idea from here:
>>>>>
>>>>> https://github.com/JuliaLang/Gtk.jl/blob/master/doc/precompilation.md
>>>>>
>>>>> The problem is that I cannot figure out where my jula/base directory
>>>>> is. It appears to be nowhere. I have two candidate directories:
>>>>>
>>>>> /usr/share/julia
>>>>> /usr/local/julia
>>>>>
>>>>> My Julia version is 0.3.1. The file /usr/share/julia/VERSION says it
>>>>> is 0.3.0-prerelease. On the other hand, /var/lib/dpkg/info/julia.list
>>>>> seems to say that /usr/share/julia is the correct directory. So that
>>>>> doesn't make sense. The other directory --- /usr/local/julia --- does
>>>>> not have any VERSION file or anything that I could that would tell me what
>>>>> version of Julia it is for. I tried adding the "userimg.jl" file to
>>>>> both directories, but that didn't do anything. Even more strangely,
>>>>> neither
>>>>> directory one seems to be required for Julia to run. Look:
>>>>>
>>>>>
>>>>> $ sudo mv /usr/share/julia $HOME/usr-share-julia
>>>>> $ sudo mv /usr/local/julia $HOME/usr-local-julia
>>>>> $
>>>>> $ julia --version
>>>>> julia version 0.3.1
>>>>> $
>>>>> $ julia
>>>>> _
>>>>> _ _ _(_)_ | A fresh approach to technical computing
>>>>> (_) | (_) (_) | Documentation: http://docs.julialang.org
>>>>> _ _ _| |_ __ _ | Type "help()" for help.
>>>>> | | | | | | |/ _` | |
>>>>> | | |_| | | | (_| | | Version 0.3.1 (2014-09-21 21:30 UTC)
>>>>> _/ |\__'_|_|_|\__'_| | Official http://julialang.org release
>>>>> |__/ | x86_64-linux-gnu
>>>>>
>>>>> julia>
>>>>>
>>>>>
>>>>> In other words, neither of those directories seems to be needed to run
>>>>> Julia. So, I am completely stuck. I have two "base" directories,
>>>>> neither of which seems to do anything.
>>>>>
>>>>> Can anyone help me out?
>>>>>
>>>>> Cheers,
>>>>> Daniel.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>
>>>
>>> --
>>> When an engineer says that something can't be done, it's a code phrase
>>> that means it's not fun to do.
>>>
>>
>
--
When an engineer says that something can't be done, it's a code phrase that
means it's not fun to do.
