如何在CMake中激活C ++ 11？ [英] How do I activate C++ 11 in CMake?

问题描述

当我尝试运行CMake生成的makefile来编译程序时，出现以下错误

When I try to run a CMake generated makefile to compile my program, I get the error that

基于循环的范围不正确在C ++ 98模式下受支持。

range based for loops are not supported in C++ 98 mode.

我尝试添加 add_definitions（-std = c ++ 0x）到我的 CMakeLists.txt ，但这没有帮助。

I tried adding add_definitions(-std=c++0x) to my CMakeLists.txt, but it did not help.

我也尝试过：

if(CMAKE_COMPILER_IS_GNUCXX)
    add_definitions(-std=gnu++0x)
endif()

我做 g ++ --version 时，我得到：

g ++（Ubuntu / Linaro 4.6.1-9ubuntu3）4.6.1

g++ (Ubuntu/Linaro 4.6.1-9ubuntu3) 4.6.1

我也尝试过 SET（CMAKE_CXX_FLAGS -std = c ++ 0x），这也行不通。

I have also tried SET(CMAKE_CXX_FLAGS "-std=c++0x"), which also does not work.

我不明白如何使用CMake激活C ++ 11功能。

I do not understand how I can activate C++ 11 features using CMake.

推荐答案

事实证明， SET（CMAKE_CXX_FLAGS -std = c ++ 0x）确实激活了许多C ++ 11功能。它不起作用的原因是该语句看起来像这样：

As it turns out, SET(CMAKE_CXX_FLAGS "-std=c++0x") does activate many C++11 features. The reason it did not work was that the statement looked like this:

set(CMAKE_CXX_FLAGS "-std=c++0x ${CMAKE_CXX_FLAGS} -g -ftest-coverage -fprofile-arcs")

按照这种方法， -std = c ++ 0x 标志被覆盖，因此无法正常工作。

Following this approach, somehow the -std=c++0x flag was overwritten and it did not work. Setting the flags one by one or using a list method is working.

list( APPEND CMAKE_CXX_FLAGS "-std=c++0x ${CMAKE_CXX_FLAGS} -g -ftest-coverage -fprofile-arcs")

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