fatal error: 'ImfIO.h' file not found, PyCharm terminal, MacOs : Ventura

[TUGCE12]

The error I get when I run pip install openexr from PyCharm Terminal on Mac M2, Ventura 13.4.1 Computer.

% pip install openexr                                                                             
  Building wheel for openexr (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [15 lines of output]
      Looking for libOpenEXR...
      running bdist_wheel
      running build
      running build_py
      creating build
      creating build/lib.macosx-10.9-universal2-3.9
      copying Imath.py -> build/lib.macosx-10.9-universal2-3.9
      running build_ext
      creating build/temp.macosx-10.9-universal2-3.9
      clang -Wno-unused-result -Wsign-compare -Wunreachable-code -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -iwithsysroot/System/Library/Frameworks/System.framework/PrivateHeaders -iwithsysroot/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/Headers -arch arm64 -arch x86_64 -Werror=implicit-function-declaration -Wno-error=unreachable-code -I/usr/include/OpenEXR -I/usr/local/include/OpenEXR -I/opt/local/include/OpenEXR -I/usr/include/Imath -I/usr/local/include/Imath -I/opt/local/include/Imath -I/.../venv/include -I/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.9/include/python3.9 -c OpenEXR.cpp -o build/temp.macosx-10.9-universal2-3.9/OpenEXR.o -g -DVERSION=\"1.3.9\" -std=c++11 -Wc++11-extensions -Wc++11-long-long
      **OpenEXR.cpp:36:10: fatal error: 'ImfIO.h' file not found**
      #include <ImfIO.h>
               ^~~~~~~~~
      1 error generated.
      error: command '/usr/bin/clang' failed with exit code 1
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for openexr
  Running setup.py clean for openexr
Failed to build openexr
ERROR: Could not build wheels for openexr, which is required to install pyproject.toml-based projects

---

It didn't work either when I ran these commands:

git clone https://github.com/sanguinariojoe/pip-openexr.git
cd pip-openexr
sudo python setup.py install

and I got the same error:

OpenEXR.cpp:36:10: fatal error: 'ImfIO.h' file not found
#include <ImfIO.h>
          ^~~~~~~~~
1 error generated.

[paolovalerdi]

I had the same error. If anyone faces this issue I was able to solve following these steps:

First install openexr using homebrew
brew install openexr

Then I cloned the repo
git clone [email protected]:sanguinariojoe/pip-openexr.git

After that I edited the setup.py file as per this comment. In my case the version homebrew installed is 3.1.9. So those lines look like this:

setup.py:

include_dirs = [
    "/usr/include/OpenEXR",
    "/usr/local/include/OpenEXR",
    "/opt/local/include/OpenEXR",
    "/usr/include/Imath",
    "/usr/local/include/Imath",
    "/opt/local/include/Imath",
    "/opt/homebrew/opt/openexr/3.1.9/lib",
    "/opt/homebrew/opt/imath//3.1.9/lib",
]

library_dirs = [
    "/usr/lib",
    "/usr/local/lib",
    "/opt/local/lib",
    "/opt/homebrew/opt/openexr/3.1.9/lib",
    "/opt/homebrew/opt/imath//3.1.9/lib",
]

Finally I just ran the setup file using
python setup.py install

Hope this helps anyone facing this issue :)

[JGroxz]

There is an alternative way without editing setup.py (originally found it here):

1. Install through brew:

   brew install openexr

2. Define these:

   # These environment variables are required for OpenEXR pip package to compile
   export CFLAGS="-I/opt/homebrew/include/OpenEXR -I/opt/homebrew/include/Imath -std=c++11"
   export LDFLAGS="-L/opt/homebrew/lib"

3. Install:

   pip install openexr

I hope this helps!