Note that Ben was building Sage from source, whereas you're trying to
modify a binary Sage installation, something that is more error-prone.
Would you mind trying to build from source instead?


On Tue, Oct 8, 2019 at 10:22 PM Zachary Scherr <[email protected]> wrote:

> That makes sense. I also tried installing gcc@8 and symlinking gfortran
> to make it point to the older version, but everything I've tried fails at
> the same point.
>
> On Tuesday, October 8, 2019 at 7:14:49 PM UTC-4, Dima Pasechnik wrote:
>>
>> No, you do NOT need "proper" gcc to build Sage on OSX, you need OSX's
>> clang/clang++
>> OSX in its infinite wisdom aliases clang to gcc.
>>
>> One cannot build Sage on OSX with "real" gcc.
>> That is, your "gcc" should be /usr/bin/gcc, which is actually clang.
>>
>>
>>
>> On Tue, Oct 8, 2019 at 5:56 PM Zachary Scherr <[email protected]> wrote:
>>
>>> Hi Dima,
>>>
>>>    I have, but I noticed something interesting which is that gcc and g++
>>> are no longer symlinked in my /usr/local/bin.  I have gcc-9 and g++-9 in
>>> there, but when I try "which gcc" and "which g++" I get /usr/bin/gcc and
>>> /usr/bin/g++ which are the versions installed by command line tools.  This
>>> is making me even more confused because sage didn't even attempt to build
>>> with the version of gcc installed by homebrew.
>>>
>>>    I'm currently retesting with gcc and g++ symlinked to the new
>>> version.  I'll let you know if I have any success.
>>>
>>> Thanks,
>>> Zach
>>>
>>> On Tuesday, October 8, 2019 at 4:25:23 PM UTC-4, Dima Pasechnik wrote:
>>>>
>>>> did you try updating homebrew?
>>>>
>>>> I think that what ultimately helped Ben to get a working gfortran, and
>>>> correctly build whatever scipy's dependency is causing the problem.
>>>>
>>>>
>>>> On Tue, Oct 8, 2019 at 3:17 PM Zachary Scherr <[email protected]> wrote:
>>>>
>>>>> In an attempt to add openssl to sage I ran: sage -i openssl && sage -f
>>>>> python2 (which I've done successfully in every previous version of Sage
>>>>> 8.x).
>>>>>
>>>>> The sage -f python2 failed while trying to build scipy-1.2.0.  This
>>>>> may be related to Ben's post
>>>>> https://groups.google.com/forum/#!topic/sage-devel/40E66JVHhW8 since
>>>>> it also failed with the message
>>>>>
>>>>> ld: library not found for -lSystem
>>>>>
>>>>> I too have gcc installed through homebrew, but I also tried removing
>>>>> it and installing gfortran separately and ended up with the same error.
>>>>> I've attached the log file, anyone know what's going on?
>>>>>
>>>>>
>>>>>
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