CMakeのprojectの第2引数についての調査¶

#4132 の対応をして頂いたが、Linux環境でのPython RTCは、OpenRTMConfig.cmakeを見つけることができずcmakeが通らないことの調査

• Windows環境ならば、C++, Python のどちらのRTCでも問題なくcmakeが通る
• Linux環境でもC++ならばcmakeは通る

原因は、CMakeLists.txtでのproject文の第2引数の定義だった。
RTCBuilderではPython言語が指定された場合には第２引数としてNONEを定義している。

• C++で「cxx_test」プロジェクトを生成した場合 : project(cxx_test)
• Pythonで「py_test」プロジェクトを生成した場合 : project(py_test NONE)

NONEの指定が入っていると、OpenRTMConfig.cmakeを見つけることができない。

---

簡単なCMakeLists.txtを用意して動作確認した結果を下記に示す。

cxx_test/
　　CMakeLists.txt
　　build

py_test/
　　CMakeLists.txt
　　build

• cxx_test/CMakeLists.txt
  

  cmake_minimum_required(VERSION 3.0.2)
  
  project(cxx_test)　←★NONEなし
  
  find_package(OpenRTM)
  set(RTM_VER ${OPENRTM_VERSION})
  set(RTM_SHORT_VER ${OPENRTM_VERSION_MAJOR}${OPENRTM_VERSION_MINOR}${OPENRTM_VERSION_PATCH})
  

• py_test/CMakeLists.txt
  

  cmake_minimum_required(VERSION 3.0.2)
  
  project(py_test NONE)　←★NONEあり
  
  find_package(OpenRTM)
  set(RTM_VER ${OPENRTM_VERSION})
  set(RTM_SHORT_VER ${OPENRTM_VERSION_MAJOR}${OPENRTM_VERSION_MINOR}${OPENRTM_VERSION_PATCH})
  

cmakeに「-DCMAKE_FIND_DEBUG_MODE=1」オプションを付けて実行すると分かる。

• cxx_test・・・OK!
  

  $ cmake .. -DCMAKE_FIND_DEBUG_MODE=1
  Checking prefix [/usr/local/]
  Checking file [/usr/local/OpenRTMConfig.cmake]
  Checking file [/usr/local/openrtm-config.cmake]
  Checking prefix [/usr/]
  Checking file [/usr/OpenRTMConfig.cmake]
  Checking file [/usr/openrtm-config.cmake]
  Checking file [/usr/lib/x86_64-linux-gnu/openrtm-1.2/OpenRTMConfig.cmake]
  Checking file [/usr/lib/x86_64-linux-gnu/openrtm-1.2/openrtm-config.cmake]
  Checking file [/usr/share/openrtm-1.2/OpenRTMConfig.cmake]
  Checking file [/usr/share/openrtm-1.2/openrtm-config.cmake]
  Checking file [/usr/lib/x86_64-linux-gnu/openrtm-1.2/cmake/OpenRTMConfig.cmake]
  -- OpenRTMConfig.cmake found.
  -- Configrued by configuration mode.
  -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
  -- Checking for module 'omniORB4'
  --   Found omniORB4, version 4.1.6
  -- OpenRTM-aist configuration done
  -- Configuring done
  -- Generating done
  

• py_test・・・NG!　OpenRTMConfig.cmakeを見つけることができない。
  

  $ cmake .. -DCMAKE_FIND_DEBUG_MODE=1
  Checking prefix [/usr/local/]
  Checking file [/usr/local/OpenRTMConfig.cmake]
  Checking file [/usr/local/openrtm-config.cmake]
  Checking prefix [/usr/]
  Checking file [/usr/OpenRTMConfig.cmake]
  Checking file [/usr/openrtm-config.cmake]
  Checking file [/usr/share/openrtm-1.2/OpenRTMConfig.cmake]
  Checking file [/usr/share/openrtm-1.2/openrtm-config.cmake]
  Checking prefix [/]
  Checking file [/OpenRTMConfig.cmake]
  Checking file [/openrtm-config.cmake]
  Checking prefix [/usr/games/]
  Checking file [/usr/games/OpenRTMConfig.cmake]
  Checking file [/usr/games/openrtm-config.cmake]
  Checking prefix [/usr/local/games/]
  Checking file [/usr/local/games/OpenRTMConfig.cmake]
  Checking file [/usr/local/games/openrtm-config.cmake]
  Checking prefix [/snap/]
  Checking file [/snap/OpenRTMConfig.cmake]
  Checking file [/snap/openrtm-config.cmake]
  CMake Warning at CMakeLists.txt:12 (find_package):
    By not providing "FindOpenRTM.cmake" in CMAKE_MODULE_PATH this project has
    asked CMake to find a package configuration file provided by "OpenRTM", but
    CMake did not find one.
  
    Could not find a package configuration file provided by "OpenRTM" with any
    of the following names:
  
      OpenRTMConfig.cmake
      openrtm-config.cmake
  
    Add the installation prefix of "OpenRTM" to CMAKE_PREFIX_PATH or set
    "OpenRTM_DIR" to a directory containing one of the above files.  If
    "OpenRTM" provides a separate development package or SDK, be sure it has
    been installed.
  
  -- Configuring done
  -- Generating done