[解決済み]The C++compiler"/usr/local/bin/c+"is not able to compile a simple test program.

問題の説明

The CXX compiler identification is unknown
-- The C compiler identification is GNU 5.4.0
-- Check for working CXX compiler: /usr/local/bin/c++
-- Check for working CXX compiler: /usr/local/bin/c++ -- broken
CMake Error at /usr/share/cmake-3.5/Modules/CMakeTestCXXCompiler.cmake:54 (message):
  The C++ compiler "/usr/local/bin/c++" is not able to compile a simple test
  program.

  It fails with the following output:

   Change Dir: /home/ning/softwareo/opencv/build/CMakeFiles/CMakeTmp

  

  Run Build Command:"/usr/bin/make" "cmTC_77ead/fast"

  /usr/bin/make -f CMakeFiles/cmTC_77ead.dir/build.make
  CMakeFiles/cmTC_77ead.dir/build

  make[1]: Entering directory
  '/home/ning/softwareo/opencv/build/CMakeFiles/CMakeTmp'

  Building CXX object CMakeFiles/cmTC_77ead.dir/testCXXCompiler.cxx.o

  /usr/local/bin/c++ -o CMakeFiles/cmTC_77ead.dir/testCXXCompiler.cxx.o -c
  /home/ning/softwareo/opencv/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx

  c++: error trying to exec 'cc1plus': execvp: Not a directory

  CMakeFiles/cmTC_77ead.dir/build.make:65: recipe for target
  'CMakeFiles/cmTC_77ead.dir/testCXXCompiler.cxx.o' failed

  make[1]: *** [CMakeFiles/cmTC_77ead.dir/testCXXCompiler.cxx.o] Error 1

  make[1]: Leaving directory
  '/home/ning/softwareo/opencv/build/CMakeFiles/CMakeTmp'

  Makefile:126: recipe for target 'cmTC_77ead/fast' failed

  make: *** [cmTC_77ead/fast] Error 2

  

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:128 (project)


-- Configuring incomplete, errors occurred!

コンパイル時にc++の位置を指定すれば、解決できます.cmakeの場合、以下を加えればいいです.

cmake -DCMAKE_CXX_COMPILER=/usr/bin/c++ -DCMAKE_C_COMPILER=/usr/bin/c++ .

または

cmake -DCMAKE_CXX_COMPILER=$(which g++) -DCMAKE_C_COMPILER=$(which gcc) .