you have a lot of stuff in /usr/local/opt, e.g. gmp, but some of it is
broken, e.g. in your config.log one sees

## ----------------------------------------------------- ##
## Checking whether SageMath should install SPKG mpir... ##
## ----------------------------------------------------- ##
configure:10249: checking gmp.h usability
configure:10249: g++ -std=gnu++11 -c -g -O2  conftest.cpp >&5
configure:10249: $? = 0
configure:10249: result: yes
configure:10249: checking gmp.h presence
configure:10249: g++ -E -std=gnu++11  conftest.cpp
configure:10249: $? = 0
configure:10249: result: yes
configure:10249: checking for gmp.h
configure:10249: result: yes
configure:10257: checking gmpxx.h usability
configure:10257: g++ -std=gnu++11 -c -g -O2  conftest.cpp >&5
conftest.cpp:56:10: fatal error: 'gmpxx.h' file not found
#include <gmpxx.h>
         ^~~~~~~~~
1 error generated.

Can you fix them? (probably they are from Homebrew?)
Have a look at 
https://doc.sagemath.org/html/en/installation/source.html#macos-recommended-installation
for details, in particular .homebrew-build-env needs to be sourced.


Or remove them, they cause conflicts, most probably.

On Mon, Jun 1, 2020 at 12:09 PM Mike Zabrocki <mike.zabro...@gmail.com> wrote:
>
> I switched to the develop branch and ran into the same problem.
> Could this be a conflict with OSX 10.15.5?  I installed the update to the 
> system recently.
>
> Thanks,
> -Mike
>
> On Sunday, 31 May 2020 15:36:49 UTC-4, Mike Zabrocki wrote:
>>
>> I had started with a make distclean but then by installing a few things I 
>> thought I should start over again.  Did a "make distclean" and a "make" 
>> again with the same results.
>>
>> Here is my config.log file:
>> http://garsia.math.yorku.ca/~zabrocki/config.log
>>
>> I'm not (intentionally) doing something unusual.
>>
>> Thanks,
>> -Mike
>>
>> On Sunday, 31 May 2020 14:31:48 UTC-4, Dima Pasechnik wrote:
>>>
>>> please post the main config.log
>>>
>>> are you trying to do something unusual, like using mpir instead of gmp?
>>>
>>> is it a build from scratch?
>>>
>>> (make distclean
>>> helps most problems we see)
>>>
>>>
>>> On Sun, 31 May 2020, 18:37 Mike Zabrocki, <mike.z...@gmail.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> I'm trying to compile the latest stable version and it keeps getting stuck 
>>>> at the pplpy package.
>>>> Can someone tell me how to get around this?
>>>>
>>>> I'm installing on Mac OSX 10.15.5
>>>>
>>>> Log file is at:
>>>> http://garsia.math.yorku.ca/~zabrocki/pplpy-0.8.4.log
>>>>
>>>> Thanks,
>>>> -Mike
>>>>
>>>> ***************************************************************
>>>>
>>>> Error building Sage.
>>>>
>>>>
>>>> The following package(s) may have failed to build (not necessarily
>>>>
>>>> during this run of 'make all-start'):
>>>>
>>>>
>>>> * package:         pplpy-0.8.4
>>>>
>>>>   last build time: May 31 13:26
>>>>
>>>>   log file:        /Applications/sage/logs/pkgs/pplpy-0.8.4.log
>>>>
>>>>   build directory: /Applications/sage/local/var/tmp/sage/build/pplpy-0.8.4
>>>>
>>>>
>>>> It is safe to delete any log files and build directories, but they
>>>>
>>>> contain information that is helpful for debugging build problems.
>>>>
>>>> WARNING: If you now run 'make' again, the build directory of the
>>>>
>>>> same version of the package will, by default, be deleted. Set the
>>>>
>>>> environment variable SAGE_KEEP_BUILT_SPKGS=yes to prevent this.
>>>>
>>>>
>>>> make[1]: *** [all-start] Error 1
>>>>
>>>> make: *** [all] Error 2
>>>>
>>>> --
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>
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