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I am building an application using Pybind11 and CMake. I got almost everything to work, but there are two things that I cannot figure out:

1.) No matter what I do, I only get a Debug folder with my .pyd files in it. How do I force CMake to make a Release version? -DCMAKE_BUILD_TYPE=Release on the command line does not do it, and setting it in the CMakeFiles.txt doesn't either.

2.) After successful building, I would like to have my .pyd files copied to my site-packages folder. I thought that the last line in my CMakeFiles.txt would do that, but it doesn't. Or do I have to invoke something besides cmake --build .?

Here's my CMakeFiles.txt:

cmake_minimum_required(VERSION 3.15...3.29)
project(b LANGUAGES CXX)

set(CMAKE_BUILD_TYPE Release)

set(pybind11_DIR C:/Users/peter/.virtualenvs/b_tool-z3PwOKEe/Lib/site-packages/pybind11/share/cmake/pybind11)
set(PYBIND11_FINDPYTHON ON)
find_package(pybind11 CONFIG REQUIRED)

set(CMAKE_CXX_STANDARD 20 CACHE STRING "C++ version selection")

include_directories(C:/Users/peter/AppData/Local/Programs/Python/Python310/include
C:/Users/peter/.virtualenvs/b_tool-z3PwOKEe/Lib/site-packages/pybind11/include
modules/surface_mesh/include
modules/magnet/include
include
C:/3rd_party/glm)


####################################################################
# mesh
####################################################################

add_library(sfc_elements modules/surface_mesh/src/sfc_elements.cpp)

pybind11_add_module(surface_mesh modules/surface_mesh/src/surface_mesh.cpp)
target_link_libraries(surface_mesh PRIVATE sfc_elements)    

####################################################################
# magnet
####################################################################

add_library(ring modules/magnet/src/ring.cpp)
add_library(b_ring modules/magnet/src/b_ring.cpp)
add_library(cel modules/magnet/src/cel.cpp)

pybind11_add_module(CMagnet modules/magnet/src/c_magnet.cpp)
target_link_libraries(CMagnet PRIVATE ring) 
target_link_libraries(CMagnet PRIVATE b_ring)
target_link_libraries(CMagnet PRIVATE cel)

install(TARGETS surface_mesh CMagnet COMPONENT python DESTINATION C:/Users/peter/.virtualenvs/b_tool-z3PwOKEe/Lib/site-packages)
Improve this question
5
  • Single question per question post, please. install() commands tell CMake to do things at installing stage. You could invoke that state e.g. with cmake --install. Commented Feb 9 at 0:02
  • Which CMake generator do you use for configure the project? If you are using "Visual Studio" generator, then selecting build type is performed on build stage, by --config parameter to cmake --build. See that question for more details. Commented Feb 9 at 9:14
  • CMake just remains a mystery to me. What do I have to do to to have CMake copy the generated .pyd files to some destination? Commented Feb 11 at 20:01
  • Have you checked that question? Its answers describe several ways for copy files. Commented Feb 11 at 20:03
  • Yes, thanks, --config Release is what I was looking for. There's one more thing now: How do I specify the optimization level of the compiler? Is Release O2 or O3? Commented Mar 17 at 23:29
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