使用c ++ 0x和MingW编译CImg [英] Compiling CImg with c++0x and MingW

问题描述

我正在尝试使用std = c ++ 0x和MingW编译以下CImg示例代码:

I am trying to compile the following CImg sample code with std=c++0x and MingW:

#include "CImg.h"

using namespace cimg_library;

int main() {
    CImg<unsigned char> img(640,400,1,3); 
    img.fill(0); 
    unsigned char purple[] = { 255,0,255 }; 
    img.draw_text(100,100,"Hello World",purple);
    img.display("My first CImg code");
    return 0;
}

当我使用以下代码进行编译时:

When I compile using:

g++ -std=c++0x HelloWorld.cpp -lgdi32

我收到以下错误:

error: '_fileno' was not declared in this scope

但是当我不使用std = c ++ 0x进行编译时，它可以完美运行:

But when I compile without std=c++0x, it works perfectly:

g++ HelloWorld.cpp -lgdi32

如何在启用c ++ 0x的情况下编译CImg?

How can I compile CImg with c++0x enabled?

推荐答案

我认为gnu++0x或gnu++11应该在GCC 4.5.x下可用，并且您应该能够使用使用C ++ 11的可能性(我刚刚在自己的MinGW安装下进行了检查，但是我使用的是4.8.您可以考虑升级吗?).所以您可以简单地使用:

I think that gnu++0x or gnu++11 should be available under under GCC 4.5.x and with that you should be able to compile CImg with a possibility to use C++11 (I just checked under my own MinGW installation, however I'm using 4.8. Could you consider upgrading?). So you could simply use:

g++ -o hello_world.exe HelloWorld.cpp -O2 -lgdi32 -std=gnu++0x

或者:

g++ -o hello_world.exe HelloWorld.cpp -O2 -lgdi32 -std=gnu++11

编辑

我刚刚检查过，从GCC 4.7开始，-std=gnu++11选项可用，但是我相信在4.5.x下使用-std=gnu++0x应该没问题.

I just checked and -std=gnu++11 option is available since GCC 4.7, but I believe you should be fine with -std=gnu++0x under 4.5.x.

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