Build failure on macOS 10.15

[mcstrassell09]

attempting to compile from source on macos 10.15. I Used the following cmake config:

cmake \
  -Wno-dev \
  -DCMAKE_PREFIX_PATH=/usr/local/opt/qt \
  -DWITH_DISNEY_MATERIAL=ON \
  -DWITH_EMBREE=ON \
  -DUSE_SSE42=ON \
  -DUSE_STATIC_BOOST=OFF \
  -DBoost_PYTHON_LIBRARY=/usr/local/lib/libboost_python27.dylib \
  -DPYTHON_INCLUDE_DIR=/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/include/python2.7/ \
  -DPYTHON_LIBRARY=/usr/local/opt/python@2/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib \
  -DZLIB_INCLUDE_DIR=/usr/local/opt/zlib/include \
  -DZLIB_LIBRARY=/usr/local/opt/zlib/lib/libz.dylib \
  -DWITH_PYTHON3_BINDINGS=ON \ 
  -DBoost_PYTHON_LIBRARY=/usr/local/lib/libboost_python38.dylib \
  -DPYTHON3_INCLUDE_DIR=/usr/local/opt/python@3.8/Frameworks/Python.framework/Versions/3.8/include/python3.8m/ \
  -DPYTHON3_LIBRARY=/usr/local/opt/python@3.8/Frameworks/Python.framework/Versions/3.8/lib/libpython3.8.dylib \
  -CMAKE_BUILD_TYPE=RELEASE \
  -DWARNINGS_AS_ERRORS=OFF \
  ..
make

Was compiling well for a while:

But soon ran into trouble...

It says xcode has no sympbols. Not sure what to make of that. There is the third-party mac package available on the appleseed website. I'm not sure where in the the directory structure this should live and if i need to precompile that. Thanks.

[dictoon]

We build appleseed on macOS for every commit, maybe our Travis build script can be a source of inspiration? You can find it here:
https://github.com/appleseedhq/appleseed/blob/master/scripts/travis/build-macos.sh

And here is the corresponding log for the latest build (note that lines prefixed with a little triangle are sections that can be expanded):
https://travis-ci.org/github/appleseedhq/appleseed/jobs/672866811

[dictoon]

It says xcode has no sympbols.

Although I don't remember ever seeing this, it doesn't look like a problem.

Your issue has to do with Python 2.x. I remember seeing this error a few times. I would suggest a web search, it will probably help.

[mcstrassell09]

Yes, It's a python2.x issue. Python has dropped support for anything <3.x as of Jan 1, 2020. If runnning Catalina, installing the SDK header fix is no longer an option. Also, Homebrew no longer offers python@2 as and install formulae. So I am left with pyenv which has it's own set of environmental variable issues. Thank you for the response I will investigate more.

[dictoon]

Also, Homebrew no longer offers python@2 as and install formulae.

Really? We run this for every commit on Travis/macOS and it works fine:

brew unlink python@2
brew upgrade python@2
brew info python@2

Not sure which macOS version it's running, but does Homebrew care about that?

[mcstrassell09]

take a look at the available formulae. They've pulled it. See the closed issue here:
query homebrew/brew for "audit: do not allow to use the python@2 formula #6894"

Or Just check out the screenshot of the page..

[dictoon]

Ah, I think I understand what's going on: Python 2.7 is already installed in our macOS environment. Weird, I would have expected Brew to complain nevertheless:
https://travis-ci.org/github/appleseedhq/appleseed/jobs/674293462#L2857