如何设置CMAKE_C_COMPILER和CMAKE_CXX_COMPILER来构建Assimp for iOS？ [英] How do you set CMAKE_C_COMPILER and CMAKE_CXX_COMPILER for building Assimp for iOS?

问题描述

当我尝试通过运行 build_ios.sh 来创建Assimp时，它告诉我：

  CMake错误：您的C编译器：/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc未找到。请将CMAKE_C_COMPILER设置为有效的编译器路径或名称。 
 CMake错误：您的CXX编译器：找不到/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-g++。请将CMAKE_CXX_COMPILER设置为有效的编译器路径或名称。 
  

我需要的路径是：

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

我已尝试更改 build_ios.sh 和中的 DEVROOT IPHONE_xxxx_TOOLCHAIN.cmake ，因为这是 CMAKE_C_COMPILER 等似乎生成的，但它仍然给我相同的错误。

解决方案

选项1：

命令行如下：

  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 
  

请参阅此学习如何创建CMake缓存条目。

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选项2：
$ b

您可以在您的shell脚本 build_ios.sh 中设置环境变量 CC code> CXX 分别指向您的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 
  

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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 / code>或 enable_language（）命令）

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

请参阅 this ，了解如何在CMake中使用 set 命令。此外，此是了解一些常见CMake变量的有用资源。

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这是官方FAQ中的相关条目： http://www.cmake.org/Wiki/CMake_FAQ#How_do_I_use_a_different_compiler.3F

When I try to build Assimp by running build_ios.sh, it tells me:

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.

What I need the path to be is:

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

I've tried changing DEVROOT in build_ios.sh and IPHONE_xxxx_TOOLCHAIN.cmake, because that's what CMAKE_C_COMPILER etc seem to get generated from, but it still gives me the same errors.

解决方案

Option 1:

You can set CMake variables at command line like this:

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

See this to learn how to create a CMake cache entry.

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Option 2:

In your shell script build_ios.sh you can set environment variables CC and CXX to point to your C and C++ compiler executable respectively, example:

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

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Option 3:

Edit the CMakeLists.txt file of "Assimp": Add these lines at the top (must be added before you use project() or enable_language() command)

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

See this to learn how to use set command in CMake. Also this is a useful resource for understanding use of some of the common CMake variables.

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Here is the relevant entry from the official FAQ: http://www.cmake.org/Wiki/CMake_FAQ#How_do_I_use_a_different_compiler.3F

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