CMake 看不到编译器

安装了 CMake（没有 CLang），添加path了cmake-3.9.2/bin.

cmake -version 

作品。

有CMakeLists.txt一个文件

#cmake

cmake_minimum_required(VERSION 3.5)

project(concentration)

option(set_clang "set clang as default compiler" 0)
option(set_gpp "set g++ as default compiler" 0)
option(cros_compile "cros compile for win32" 0)

if(${UNIX})
    message(STATUS "Unix system")
elseif(${WIN32})
    message(WARNING "Work is not guaranted")
else()
    message(FATAL_ERROR "System not supported")
endif()

if(set_gpp)
    set(CMAKE_CXX_COMPILER g++)
endif()
if(set_clang)
    set(CMAKE_CXX_COMPILER clang++)
endif()
if(cros_compile)
    set(PROJECT_NAME ${PROJECT_NAME}.exe)
    set(CMAKE_CXX_COMPILER i686-w64-mingw32-g++-posix)
    set(CMAKE_CXX_FLAGS "-static-libstdc++ -static-libgcc")
endif()

message(STATUS "Project " ${PROJECT_NAME})
message(STATUS "cxx compiler " ${CMAKE_CXX_COMPILER})

add_definitions(-Wall -std=c++14)

include_directories(include)

set(MAIN_SRC sources/main.cpp)
file(GLOB CONCENTRATION_SRC "sources/concentration/*.cpp")

if(cros_compile)
    find_package(PDCurses REQUIRED)
else()
    find_package(Curses REQUIRED)
endif()

include_directories(${CURSES_INCLUDE_DIR})

add_executable(${PROJECT_NAME} ${MAIN_SRC} ${CONCENTRATION_SRC})

target_link_libraries(${PROJECT_NAME} ${CURSES_LIBRARIES})

一般来说，当我运行命令时

cmake
cmake -Dset_gpp=1 

CMake 写道：

-- The C compiler identification is unknown
-- The CXX compiler identification is unknown
CMake Error at CMakeLists.txt:5 (project):
  The CMAKE_C_COMPILER:

    cl

  is not a full path and was not found in the PATH.

  To use the NMake generator with Visual C++, cmake must be run from a shell
  that can use the compiler cl from the command line.  This environment is
  unable to invoke the cl compiler.  To fix this problem, run cmake from the
  Visual Studio Command Prompt (vcvarsall.bat).

  Tell CMake where to find the compiler by setting either the environment
  variable "CC" or the CMake cache entry CMAKE_C_COMPILER to the full path to
  the compiler, or to the compiler name if it is in the PATH.


CMake Error at CMakeLists.txt:5 (project):
  The CMAKE_CXX_COMPILER:

    cl

  is not a full path and was not found in the PATH.

  To use the NMake generator with Visual C++, cmake must be run from a shell
  that can use the compiler cl from the command line.  This environment is
  unable to invoke the cl compiler.  To fix this problem, run cmake from the
  Visual Studio Command Prompt (vcvarsall.bat).

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.


-- Configuring incomplete, errors occurred!
See also "../CMakeFiles/CMakeOutput.log".
See also "../CMakeFiles/CMakeError.log".

编译器的路径在path. g++团队正在工作。我一直从命令行编译。试图CmakeLists.txt指定一个明确的路径g++。仍然没有帮助。所有文件路径都是拉丁文。

基本上，我们需要帮助！