保存Cmake find_program中的可执行文件，以便它可以由Python运行

我正在尝试将C++和Python结合起来，为此我正在使用CMake。在CMakeLists.txt中，我尝试找到一个程序：

# Check for Gmsh executable
find_program (GMSH gmsh [/Applications/Gmsh.app/Contents/MacOS/ /usr/bin/ /usr/local/bin/])
if(GMSH)
  message(STATUS "Found Gmsh in: ${GMSH}")
  set(HAVE_GMSH YES)
else()
  set(HAVE_GMSH NO)
endif()
message(STATUS "Setting HAVE_GMSH to: ${HAVE_GMSH}")

因此，这能够毫无问题地找到可执行文件。但不知何故，我必须将其保存在某个地方，以便以后可以从 Python 调用它。这应该在配置文件中完成吗？正确的方法是什么？

更新

我创建了一个包含以下内容的文件 ProjectConfig.cmake.in：

# Compute paths
get_filename_component(PROJECT_CMAKE_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH)
set(PROJECT_INCLUDE_DIRS "@CONF_INCLUDE_DIRS@")
# Our library dependencies (contains definitions for IMPORTED targets)
include("${PROJECT_CMAKE_DIR}/ProjectTargets.cmake")
# These are IMPORTED targets created by ProjectTargets.cmake
set(PROJECT_LIBRARIES core)
set(PROJECT_EXECUTABLE bar)
#cmakedefine HAVE_GMSH @HAVE_GMSH@
#cmakedefine GMSH @GMSH@

CMakeLists.txt 文件如下所示：

cmake_minimum_required(VERSION 3.1)
project(TestProject)
enable_language(CXX)

# Options
# Offer the user the choice of overriding the installation directories
set(INSTALL_LIB_DIR lib CACHE PATH "Installation directory for libraries")
set(INSTALL_BIN_DIR bin CACHE PATH "Installation directory for executables")
set(INSTALL_INCLUDE_DIR include CACHE PATH
  "Installation directory for header files")
if(WIN32 AND NOT CYGWIN)
  set(DEF_INSTALL_CMAKE_DIR CMake)
else()
  set(DEF_INSTALL_CMAKE_DIR lib/CMake/Project)
endif()
set(INSTALL_CMAKE_DIR ${DEF_INSTALL_CMAKE_DIR} CACHE PATH
  "Installation directory for CMake files")
# Make relative paths absolute (needed later on)
foreach(p LIB BIN INCLUDE CMAKE)
  set(var INSTALL_${p}_DIR)
  if(NOT IS_ABSOLUTE "${${var}}")
    set(${var} "${CMAKE_INSTALL_PREFIX}/${${var}}")
  endif()
endforeach()
# Check for Gmsh executable
find_program (GMSH gmsh [/Applications/Gmsh.app/Contents/MacOS/ /usr/bin/ /usr/local/bin/])
if(GMSH)
  message(STATUS "Found Gmsh in: ${GMSH}")
  set(HAVE_GMSH YES)
else()
  set(HAVE_GMSH NO)
endif()
message(STATUS "Setting HAVE_GMSH to: ${HAVE_GMSH}")
# Python support
#
# find Python
find_package(PythonInterp)
# find SWIG
find_package(SWIG REQUIRED)
include(${SWIG_USE_FILE})
find_package(PythonLibs)
include_directories(${PYTHON_INCLUDE_PATH})
message(STATUS "PYTHON_INCLUDE_PATH: ${PYTHON_INCLUDE_PATH}")
message(STATUS "PYTHON_LIBRARIES:    ${PYTHON_LIBRARIES}")
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/core)
include_directories(${CMAKE_CURRENT_SOURCE_DIR}/core/fem)
#set(CMAKE_SWIG_OUTDIR ${PROJECT_BINARY_DIR}/../lib/project)
SET_SOURCE_FILES_PROPERTIES(swig/core.i PROPERTIES CPLUSPLUS ON)
set_source_files_properties(swig/core.i SWIG_FLAGS "-includeall;-c++;-shadow")
swig_add_module(core python swig/core.i core/foo.cpp)
swig_link_libraries(core project_core ${PYTHON_LIBRARIES})
################################################################################
# Directories
#
# set up include-directories
include_directories(
  "${PROJECT_SOURCE_DIR}"   # to find core/foo.hpp
  "${PROJECT_BINARY_DIR}")  # to find core/config.hpp
# Add sub-directories
add_subdirectory(core)
add_subdirectory(bar)
# The interesting stuff goes here
# ===============================
# Add all targets to the build-tree export set
export(TARGETS project_core bar
  FILE "${PROJECT_BINARY_DIR}/ProjectTargets.cmake")
# Export the package for use from the build-tree
# (this registers the build-tree with a global CMake-registry)
export(PACKAGE Project)
# Create the ProjectConfig.cmake and ProjectConfigVersion files
file(RELATIVE_PATH REL_INCLUDE_DIR "${INSTALL_CMAKE_DIR}"
   "${INSTALL_INCLUDE_DIR}")
# ... for the build tree
set(CONF_INCLUDE_DIRS "${PROJECT_SOURCE_DIR}" "${PROJECT_BINARY_DIR}")
configure_file(ProjectConfig.cmake.in
  "${PROJECT_BINARY_DIR}/ProjectConfig.cmake" @ONLY)
# ... for the install treew
set(CONF_INCLUDE_DIRS "${PROJECT_CMAKE_DIR}/${REL_INCLUDE_DIR}")
configure_file(ProjectConfig.cmake.in
  "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ProjectConfig.cmake" @ONLY)
# ... for both
configure_file(ProjectConfigVersion.cmake.in
  "${PROJECT_BINARY_DIR}/ProjectConfigVersion.cmake" @ONLY)
# Install the ProjectConfig.cmake and ProjectConfigVersion.cmake
install(FILES
  "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/ProjectConfig.cmake"
  "${PROJECT_BINARY_DIR}/ProjectConfigVersion.cmake"
  DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev)
# Install the export set for use with the install-tree
install(EXPORT ProjectTargets DESTINATION
  "${INSTALL_CMAKE_DIR}" COMPONENT dev)

现在我不确定生成的配置文件的位置(在 ${PROJECT_BINARY_DIR} 中(是否是正确的放置位置。我应该把它放在整个层次结构的根中吗？这是一个大项目，其结构如下所示：

├── AUTHORS.rst
├── CHANGELOG.rst
├── CONTRIBUTING.rst
├── LICENSE
├── MANIFEST.in
├── Makefile
├── README.rst
├── core
│   ├── CMakeLists.txt
│   ├── ProjectConfig.cmake.in
│   ├── ProjectConfigVersion.cmake.in
│   ├── Makefile
│   ├── bar
│   ├── core
│   └── swig
├── setup.cfg
├── setup.py
├── src
│   └── project
├── tests
│   └── unit
└── tox.ini