如何设置CMAKE_C_COMPILER和CMAKE_CXX_COMPILER来构建适用于iOS的Assimp？

Question

当我尝试通过运行来构建Assimp时build_ios.sh,它告诉我:

CMake Error: your C compiler: "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc" was not found.   Please set CMAKE_C_COMPILER to a valid compiler path or name.
CMake Error: your CXX compiler: "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-g++" was not found.   Please set CMAKE_CXX_COMPILER to a valid compiler path or name.

我需要的道路是:

/Applications/XCode.app/Contents/Developer/Platforms/...

我试着改变DEVROOT的build_ios.sh和IPHONE_xxxx_TOOLCHAIN.cmake,因为那是什么CMAKE_C_COMPILER等似乎得到从产生,但它仍然给了我同样的错误.

Answer 1

选项1:

您可以在命令行中设置CMake变量,如下所示:

cmake -D CMAKE_C_COMPILER="/path/to/your/c/compiler/executable" -D CMAKE_CXX_COMPILER "/path/to/your/cpp/compiler/executable" /path/to/directory/containing/CMakeLists.txt

请参阅此内容以了解如何创建CMake缓存条目.

选项2:

在shell脚本中,build_ios.sh您可以分别设置环境变量CC并CXX指向C和C++编译器可执行文件,例如:

export CC=/path/to/your/c/compiler/executable
export CXX=/path/to/your/cpp/compiler/executable
cmake /path/to/directory/containing/CMakeLists.txt

选项3:

编辑"Assimp"的CMakeLists.txt文件:在顶部添加这些行(必须在使用project()或enable_language()命令之前添加)

set(CMAKE_C_COMPILER "/path/to/your/c/compiler/executable")
set(CMAKE_CXX_COMPILER "/path/to/your/cpp/compiler/executable")

请参阅此内容以了解如何set在CMake中使用命令.此外,这是了解某些常见CMake变量使用的有用资源.

以下是官方常见问题解答中的相关条目:http://www.cmake.org/Wiki/CMake_FAQ#How_do_I_use_a_different_compiler.3F

Answer 2

cc和cxx位于内部/Applications/Xcode.app.这应该找到正确的路径

export CXX=`xcrun -find c++`
export CC=`xcrun -find cc`