couldnt find pybind11Config.cmake

[theonesud]

I have installed pybind using pip install pybind11 and using python 3.6 and cmake 3.5.

CMakeLists.txt:

cmake_minimum_required (VERSION 3.5)
project(dummy_proj)
find_package(pybind11 REQUIRED)
pybind11_add_module(test test.cpp)

Running cmake . gives an error:

CMake Error at CMakeLists.txt:4 (find_package):
By not providing "Findpybind11.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "pybind11",
but CMake did not find one.

  Could not find a package configuration file provided by "pybind11" with any
  of the following names:

    pybind11Config.cmake
    pybind11-config.cmake

  Add the installation prefix of "pybind11" to CMAKE_PREFIX_PATH or set
  "pybind11_DIR" to a directory containing one of the above files.  If
  "pybind11" provides a separate development package or SDK, be sure it has
  been installed.

Can anyone tell me how to complie it?

[loriab]

I'm not wholly sure that a pip install pybind installs pybind11Config.cmake and other needed files. (I do know that the latest conda install pybind11 -c conda-forge does.) If, after your pip install, you confirm that <install-dir>/share/cmake/pybind11/pybind11Config.cmake exists (in which case ignore my first two sentences), you can instruct cmake to find it via cmake -Dpybind11_DIR=<install-dir>/share/cmake/pybind11. Hope that helps.

[theonesud]

I searched for pybind11Config.cmake in my system, but couldn't find any. It only installs the header files. I saw a talk from Ivan Smirnov where he mentioned installing with pip and using cmake. Conda install works. Thanks.

[rob-smallshire]

A mention that I just ran into this issue too.

[theonesud]

@rob-smallshire check this out - https://github.com/sdhnshu/pybind_demo

[hanzhaogang]

hit the same problem

[bluenote10]

Would it be possible to include the pybind11Config.cmake in the Python wheel? I was expecting that the wheel contains everything that is needed which would be header + the cmake config script...

[darioizzo]

I have the same issue when using appveyor to build projects using pybind11. It would be nice to have pybind installed via pip rather than having to download the source configure and install it.

[gdcutting]

There is definitely a documentation issue here. After reading some stackexchange stuff, I realized the best way to install pybind11 is by conda, which was easy and solved the issue of the missing cmake file. But why isn't this (how to install pybind11) the first thing you see here: https://pybind11.readthedocs.io/en/stable/basics.html
I shouldn't have to google around to figure out the proper install procedure. The docs front goes straight to "Compiling test cases", but skips a discussion of the recommended install procedure. This is causing confusion because some people are using pip to install but this does not install some of the files (like cmake file). "First Steps" really means "First Steps After Installation". This is a sin of omission.

[danFromTelAviv]

I am working on arm and it's a bitch to install new versions of conda here. I tried to clone and make - I don't see any folder named share? I do see pybind11Config.cmake in pybind11/build but when I link to it ( export pybind11_DIR to the build folder) I get a different error when making the program i"m actually interested in ( caffe2 ).

CMake Error at /root/pybind11/build/pybind11Config.cmake:100 (include):
include could not find load file:
pybind11Tools

This file does exist in pybind11/tools which makes me think that I'm not linking appropriately.

Is there a way to properly install without conda?

Thanks in advance, Dan

I'm not wholly sure that a pip install pybind installs pybind11Config.cmake and other needed files. (I do know that the latest conda install pybind11 -c conda-forge does.) If, after your pip install, you confirm that <install-dir>/share/cmake/pybind11/pybind11Config.cmake exists (in which case ignore my first two sentences), you can instruct cmake to find it via cmake -Dpybind11_DIR=<install-dir>/share/cmake/pybind11. Hope that helps.

[danFromTelAviv]

I don't need help with this anymore, but my question may still be relevant for others so i'll leave it up here.

[JamesKCS]

The solution above is not completely solving it for me. I removed the pip version, and installed the conda version. I added

-Dpybind11_DIR=/home/james/anaconda3/envs/mycondaenv/share/cmake/pybind11

and my CMakeLists.txt file is

project(pybind_learning_try2)

set(CMAKE_CXX_STANDARD 11)

find_package(pybind11 REQUIRED)
pybind11_add_module(Vehicle Vehicle_pb.cpp)

add_executable(pybind_learning_try2 main.cpp example.cpp example_pb.cpp Vehicle.cpp Vehicle.h Vehicle_pb.cpp util.cpp util.h Truck.cpp Truck.h)

Now the cmake project loads correctly (in my CLion IDE), no longer giving the error ...Could not find a package configuration file provided by "pybind11"..., but the line

#include <pybind11/pybind11.h> in my .cpp file now fails to compile with

fatal error: pybind11/pybind11.h: No such file or directory #include <pybind11/pybind11.h>

I can still compile correctly in the command line in my virtual environment with

c++ -O3 -Wall -shared -std=c++11 -fPIC `python3 -m pybind11 --includes` Vehicle_pb.cpp util.cpp -o Vehicle`python3-config --extension-suffix`

Apologies if the solution is trivial, thank you in advance for the help.

EDIT: The solution:
CLion->settings->Build, Ex..->CMake->CMake options: add (without quotes)
"-Dpybind11_DIR=/home/james/anaconda3/envs/mycondaenv/share/cmake/pybind11"

Then your CMakeLists.txt will look something like:

cmake_minimum_required(VERSION 3.10)
project(pybind_learning_try2)

set(CMAKE_CXX_STANDARD 11)

find_package(pybind11 REQUIRED)
include_directories(${pybind11_INCLUDE_DIR})
pybind11_add_module(...)

add_executable(...)

where the ... represent things you need to fill in.

[blokhin]

If possible, please, re-open. There is still no way to install this library without conda, e.g. as a dependency, because the file pybind11Config.cmake is absent. See for instance onnx/onnx#1624 as well as #1628 and #1733