mirror of https://github.com/Qiskit/qiskit-aer.git
101 lines
4.8 KiB
CMake
101 lines
4.8 KiB
CMake
find_package(PythonLibs)
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message(STATUS ${PYTHON_INCLUDE_DIRS})
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message(STATUS "PYTHON EXECUTABLE: ${PYTHON_EXECUTABLE}")
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# Pybind includes are searched for through python
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# If they aren't found, we set them to the python include directories
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# set by CMake
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set(_find_pybind_includes_command "
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import sys
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import pybind11
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sys.stdout.write(pybind11.get_include())
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")
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execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "${_find_pybind_includes_command}"
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OUTPUT_VARIABLE _py_output
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RESULT_VARIABLE _py_result)
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if(_py_result EQUAL "0")
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message(STATUS "PYCOMM RAW: ${_py_output}")
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set(PYBIND_INCLUDE_DIRS "${_py_output}")
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else()
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message(WARNING "(NAIVE) CHECK COULD NOT FIND PYBIND!")
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set(PYBIND_INCLUDE_DIRS ${PYTHON_INCLUDE_DIRS})
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endif()
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message(STATUS "PYBIND INCLUDES: ${PYBIND_INCLUDE_DIRS}")
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if (NOT DEFINED PYTHON_EXTENSION_MODULE_SUFFIX)
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execute_process(COMMAND "${PYTHON_EXECUTABLE}" -c "import sysconfig; print(sysconfig.get_config_var('EXT_SUFFIX'), end='')"
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OUTPUT_VARIABLE PYTHON_EXTENSION_MODULE_SUFFIX)
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endif()
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function(basic_pybind11_add_module target_name)
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set(options MODULE SHARED EXCLUDE_FROM_ALL NO_EXTRAS SYSTEM THIN_LTO)
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cmake_parse_arguments(ARG "${options}" "" "" ${ARGN})
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if(ARG_MODULE AND ARG_SHARED)
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message(FATAL_ERROR "Can't be both MODULE and SHARED")
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elseif(ARG_SHARED)
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set(lib_type SHARED)
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else()
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set(lib_type MODULE)
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endif()
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if(ARG_EXCLUDE_FROM_ALL)
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set(exclude_from_all EXCLUDE_FROM_ALL)
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endif()
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add_library(${target_name} ${lib_type} ${exclude_from_all} ${ARG_UNPARSED_ARGUMENTS})
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# This sets various properties (python include dirs) and links to python libs
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target_include_directories(${target_name} PRIVATE ${PYTHON_INCLUDE_DIRS})
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target_include_directories(${target_name} PRIVATE ${PYBIND_INCLUDE_DIRS})
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if(WIN32 OR CYGWIN)
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# Link against the Python shared library on Windows
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target_link_libraries(${target_name} ${PYTHON_LIBRARIES})
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elseif(APPLE)
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# It's quite common to have multiple copies of the same Python version
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# installed on one's system. E.g.: one copy from the OS and another copy
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# that's statically linked into an application like Blender or Maya.
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# If we link our plugin library against the OS Python here and import it
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# into Blender or Maya later on, this will cause segfaults when multiple
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# conflicting Python instances are active at the same time (even when they
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# are of the same version).
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# Windows is not affected by this issue since it handles DLL imports
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# differently. The solution for Linux and Mac OS is simple: we just don't
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# link against the Python library. The resulting shared library will have
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# missing symbols, but that's perfectly fine -- they will be resolved at
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# import time.
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# Set some general flags
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if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
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set(AER_LINKER_FLAGS "${AER_LINKER_FLAGS} -undefined dynamic_lookup")
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else()
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# -flat_namespace linker flag is needed otherwise dynamic symbol resolution doesn't work as expected with GCC.
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# Symbols with the same name exist in different .so, so the loader just takes the first one it finds,
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# which is usually the one from the first .so loaded.
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# See: Two-Leve namespace symbol resolution
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set(AER_LINKER_FLAGS "${AER_LINKER_FLAGS} -undefined dynamic_lookup -flat_namespace")
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endif()
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if(ARG_SHARED)
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set_target_properties(${target_name} PROPERTIES MACOSX_RPATH ON)
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endif()
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endif()
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# -fvisibility=hidden is required to allow multiple modules compiled against
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# different pybind versions to work properly, and for some features (e.g.
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# py::module_local). We force it on everything inside the `pybind11`
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# namespace; also turning it on for a pybind module compilation here avoids
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# potential warnings or issues from having mixed hidden/non-hidden types.
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set_target_properties(${target_name} PROPERTIES PREFIX "${PYTHON_MODULE_PREFIX}")
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set_target_properties(${target_name} PROPERTIES SUFFIX "${PYTHON_EXTENSION_MODULE_SUFFIX}")
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set_target_properties(${target_name} PROPERTIES CXX_VISIBILITY_PRESET "hidden")
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set_target_properties(${target_name} PROPERTIES CUDA_VISIBILITY_PRESET "hidden")
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set_target_properties(${target_name} PROPERTIES
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CXX_STANDARD 14
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LINKER_LANGUAGE CXX)
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# Warning: Do not merge PROPERTIES when one of the variables can be empty, it breaks
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# the rest of the properties so they are not properly added.
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set_target_properties(${target_name} PROPERTIES LINK_FLAGS ${AER_LINKER_FLAGS})
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set_target_properties(${target_name} PROPERTIES COMPILE_FLAGS ${AER_COMPILER_FLAGS})
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endfunction()
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