我对此CMakeLists.txt
文件有问题:
cmake_minimum_required(VERSION 2.6)
SET(CMAKE_C_COMPILER C:/MinGW/bin/gcc)
SET(CMAKE_CXX_COMPILER C:/MinGW/bin/g++)
project(cmake_test)
add_executable(a.exe test.cpp)
用
cmake -G "MinGW Makefiles"
调用cmake,它将失败,并显示以下输出:c:\Users\pietro.mele\projects\tests\buildSystem_test\cmake_test>cmake -G "MinGW Makefiles" .
-- The C compiler identification is GNU 4.6.1
-- The CXX compiler identification is GNU 4.6.1
-- Check for working C compiler: C:/MinGW/bin/gcc
CMake Error: your C compiler: "C:/MinGW/bin/gcc" was not found. Please set CMAKE_C_COMPILER to a valid compiler path or name.
CMake Error: Internal CMake error, TryCompile configure of cmake failed
-- Check for working C compiler: C:/MinGW/bin/gcc -- broken
CMake Error at C:/Program Files (x86)/CMake 2.8/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE):
The C compiler "C:/MinGW/bin/gcc" is not able to compile a simple test
program.
CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
CMakeLists.txt:10 (project)
CMake Error: your C compiler: "C:/MinGW/bin/gcc" was not found. Please set CMAKE_C_COMPILER to a valid compiler path or name.
CMake Error: your CXX compiler: "C:/MinGW/bin/g++" was not found. Please set CMAKE_CXX_COMPILER to a valid compiler path or name.
-- Configuring incomplete, errors occurred!
但是,
gcc
编译器位于C:/MinGW/bin/
中,并且可以工作。任何想法?
平台:
最佳答案
切勿尝试在CMakeLists.txt
文件中设置编译器。
请参阅有关如何使用其他编译器的CMake常见问题解答:
https://gitlab.kitware.com/cmake/community/wikis/FAQ#how-do-i-use-a-different-compiler
(请注意,您正在尝试方法3,而FAQ则显示“(避免)” ...)
我们建议避免使用“in CMakeLists”技术,因为在使用其他编译器进行首次配置时会出现问题,然后更改CMakeLists文件以尝试设置其他编译器...并且因为CMakeLists文件的意图应该根据运行CMake的开发人员的喜好与多个编译器一起使用。
最好的方法是在构建树中首次调用CMake之前设置环境变量CC
和CXX
。
在CMake检测到要使用哪些编译器之后,它将它们保存在CMakeCache.txt
文件中,以便即使这些变量从环境中消失了,它仍然可以生成正确的构建系统...
如果您需要更改编译器,则需要从新的构建树开始。
关于gcc - 无法使用CMake指定编译器,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13054451/