Re: Octave gcc problem (Homebrew Mac)

[Vic Norton]

That seemed to work fine, Sebastian. Thanks so much!!!  - Vic

> On May 5, 2017, at 8:59 AM, Sebastian Schöps <address@hidden> wrote:
> 
> Ok, what about this?
> 
> # get new versions
> brew update 
> 
> # install new versions
> brew upgrade 
> 
> # uninstall broken octave
> brew uninstall octave
> 
> # reinstall octave from source
> brew install --build-from-source octave
> 
> Bye
> Sebastian
> 
>> Am 05.05.2017 um 14:55 schrieb Vic Norton <address@hidden>:
>> 
>> Unfortunately your advice didn’t work for me, Sebastian. - Vic
>> 
>> ~$ brew install --build-from-source octave
>> Updating Homebrew...
>> ==> Auto-updated Homebrew!
>> Updated 3 taps (caskroom/cask, homebrew/core, homebrew/science).
>> ==> Updated Formulae
>> certbot                                  homebrew/science/plink2
>> git-extras                               homebrew/science/poretools
>> homebrew/science/calculix-ccx            homebrew/science/qrupdate ✔
>> homebrew/science/gmsh                    kubernetes-helm
>> homebrew/science/p4est                   todoman
>> homebrew/science/pastix                  yadm
>> homebrew/science/plasma
>> 
>> Warning: homebrew/science/octave-4.2.1_2 already installed
>> ~$ octave
>> dyld: Library not loaded: /usr/local/opt/gcc/lib/gcc/7/libgfortran.4.dylib
>> Referenced from: /usr/local/bin/octave-cli
>> Reason: image not found
>> Abort trap: 6
>> 
>>> On May 5, 2017, at 8:29 AM, Sebastian Schöps <address@hidden> wrote:
>>> 
>>> Dear Vic, 
>>> 
>>> you updated by purpose or accident your gcc. This may of course break 
>>> dependencies like octave. The proper way is to recompile all dependencies, 
>>> including octave
>>> 
>>> brew install --build-from-source octave 
>>> 
>>> This is necessary as there is currently no octave binary for the new gcc. 
>>> However, there will be a new one soon since this is a known issue:
>>> 
>>> https://github.com/Homebrew/homebrew-science/issues/4972#issuecomment-299394176
>>> 
>>> Sebastian
>>> 
>>>> Am 05.05.2017 um 14:18 schrieb Vic Norton <address@hidden>:
>>>> 
>>>>> On May 4, 2017, at 5:25 PM, Vic Norton <address@hidden> wrote:
>>>>> 
>>>>> 
>>>>>> On May 4, 2017, at 4:40 PM, Vic Norton <address@hidden> wrote:
>>>>>> 
>>>>>> Hi Sebastian,
>>>>>> 
>>>>>> I just did a brew upgrade and it killed octave. Here is the error 
>>>>>> message I get.
>>>>>> ~$ octave
>>>>>> dyld: Library not loaded: 
>>>>>> /usr/local/opt/gcc/lib/gcc/6/libgfortran.3.dylib
>>>>>> Referenced from: /usr/local/bin/octave-cli
>>>>>> Reason: image not found
>>>>>> Abort trap: 6
>>>>>> 
>>>>>> Apparently the problem is that
>>>>>> /usr/local/opt/gcc
>>>>>> has just become a symbolic link to
>>>>>> /usr/local/Cellar/gcc/7.1.0
>>>>>> rather than the previous
>>>>>> /usr/local/Cellar/gcc/6.3.0_1.
>>>>>> And a new libgfortran.4.dylib resides in the 7.1.0 version of gcc.
>>>>>> 
>>>>>> I hate to mess with Homebrew. I expect the problem might be fixed by 
>>>>>> forcing
>>>>>> /usr/local/opt/gcc
>>>>>> to link to
>>>>>> /usr/local/Cellar/gcc/6.3.0_1
>>>>>> as before, but it does seem that Homebrew’s octave-cli should be 
>>>>>> adjusted for the new address@hidden
>>>>>> 
>>>>>> What is your advice? Right now I am dead in the water.
>>>>>> 
>>>>>> Regards,
>>>>>> 
>>>>>> Vic 
>>>>> 
>>>>> Well, I hated to mess with Homebrew, but the above solution did work. I 
>>>>> now have a working Octave. Here is what I did in Terminal.
>>>>> 
>>>>> 1. I changed my directory to /usr/local/opt
>>>>> 2. I relabeled gcc as gcc-new
>>>>> 3. I ran
>>>>> $ ln -s /usr/local/Cellar/gcc/6.3.0_1 gcc
>>>>> 
>>>>> Now Octave 4.2.1 works as before, but I’ve messed up the latest Homebrew 
>>>>> gcc in /usr/local/opt.
>>>>> 
>>>>> I don’t like this solution. I’d rather have an Octave that can use 
>>>>> Homebrew’s address@hidden
>>>>> 
>>>>> -
>>>>> Vic
>>>> 
>>>> This morning the Homebrew Octave was upgraded to 4.2.1_2, which now links 
>>>> to address@hidden, so I undid the above kludge. Now the original error 
>>>> message 
>>>>>> ~$ octave
>>>>>> dyld: Library not loaded: 
>>>>>> /usr/local/opt/gcc/lib/gcc/6/libgfortran.3.dylib
>>>>>> Referenced from: /usr/local/bin/octave-cli
>>>>>> Reason: image not found
>>>>>> Abort trap: 6
>>>> has gone away, but a new one has taken its place:
>>>> ~$ octave
>>>> dyld: Library not loaded: /usr/local/opt/gcc/lib/gcc/6/libgfortran.3.dylib
>>>> Referenced from: /usr/local/opt/qrupdate/lib/libqrupdate.1.dylib
>>>> Reason: image not found
>>>> Abort trap: 6
>>>> Apparently qrupdate has not been upgraded to link to address@hidden
>>>> 
>>>> I am giving up my kludges. Is there any way I can get good Octave from 
>>>> Homebrew?
>>>> 
>>>> -
>>>> Vic
>>>> 
>>>> 
>>> 
>> 
>