Pip wheels for Mac M1 (arm64)

[renatobusatto]

I am struggling to build the library on a Macbook Pro M1 with the given instructions and latest commit in master.

[sarlinpe]

I do not have access to a Macbook Pro M1, so I cannot help without detailed logs and error outputs. I do not know if anyone has tried so far. You likely need to build COLMAP and pycolmap from source - see https://github.com/colmap/colmap/issues/1423

[renatobusatto]

I finally managed to build on a MacBook Pro M1. I am not sure how I could contribute to this project, is it enough to share the .whl file?

[sarlinpe]

Can you please instead describe in details what steps you took to make it work so others can reproduce it?

[renatobusatto]

I am using Homebrew and Miniforge.

First I had to install qt5 using Homebrew: brew install qt5 And create a python 3.9 environment: conda create -n myenv python=3.9 conda activate myenv

Then build Colmap:

conda install cmake boost eigen freeimage glog gflags metis suitesparse ceres-solver glew cgal
git clone -b dev [email protected]:colmap/colmap.git
cd colmap
mkdir build
cd build
cmake .. -DBOOST_STATIC=OFF -DQt5_DIR="/opt/homebrew/opt/qt@5/lib/cmake/Qt5" -DCGAL_DATA_DIR="/opt/homebrew/Caskroom/miniforge/base/myenv/hloc/lib/cmake/CGAL"
make
make install
sudo install_name_tool -add_rpath /opt/homebrew/Caskroom/miniforge/base/envs/myenv/lib /usr/local/bin/colmap
cd ../..
# Test with colmap -h

Then build pycolmap:

git clone --recursive [email protected]:colmap/pycolmap.git
cd pycolmap
export CMAKE_PREFIX_PATH="/opt/homebrew/opt/qt@5/lib/cmake/Qt5"
export CGAL_DATA_DIR="/opt/homebrew/Caskroom/miniforge/base/envs/myenv/lib/cmake/CGAL"
pip install -v .

[chekhovana]

I tried to build colmap following your steps. Everything went ok, but when I tried to start it, I got the following error:

ERROR: flag 'flagfile' was defined more than once (in files '/tmp/gflags-20211021-3963-1mi18ai/gflags-2.2.2/src/gflags.cc' and '/Users/runner/miniforge3/conda-bld/gflags_1599590635449/work/src/gflags.cc').

Could you guess what might be the problem?

[yliuiuc1990]

I was able to build, but got an error when trying to import pycomap:

>>> import pycolmap
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/PATH_TO_PYTHON/python3.9/site-packages/pycolmap.cpython-39-darwin.so, 0x0002): symbol not found in flat namespace '___kmpc_barrier'

Any idea what went wrong? I used the dev branch of colmap as of today (7/15/2022). Should I use a different version of colmap for ToT pycolmap?

[yliuiuc1990]

I was able to build, but got an error when trying to import pycomap:

>>> import pycolmap
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: dlopen(/PATH_TO_PYTHON/python3.9/site-packages/pycolmap.cpython-39-darwin.so, 0x0002): symbol not found in flat namespace '___kmpc_barrier'

Any idea what went wrong? I used the dev branch of colmap as of today (7/15/2022). Should I use a different version of colmap for ToT pycolmap?

I was able to resolve this error by disabling OpenMP, i.e. change the ON in this line of CMakeLIst.txt of colmap repo to OFF:

option(OPENMP_ENABLED "Whether to enable OpenMP parallelization" OFF)

Not sure about the performance penalty this incurs.