SFML 2.1程序在调试模式下运行良好，但在发布模式下崩溃

Question

I am using Qt Creator for an SFML project. The problem I am currently experiencing is that my application will crash on a certain line of code only if I am running in release mode.

I've stripped down my application to find the exact line of code that is causing the problem. Here is what my entire program looks like:

Works in Debug Mode; Crashes in Release Mode

#include <SFML/Graphics.hpp>

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML Worked!");
    window.setVerticalSyncEnabled(true);

    sf::Shader shader;
    shader.loadFromFile("data\\shaders\\HorizontalBlur.frag", sf::Shader::Fragment);

    return 0;
}

If I remove the loadFromFile code, then it will run fine in both debug and release modes.

Works in Debug Mode; Works in Release Mode

#include <SFML/Graphics.hpp>

int main()
{
    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML Worked!");
    window.setVerticalSyncEnabled(true);

    sf::Shader shader;
    //shader.loadFromFile("data\\shaders\\HorizontalBlur.frag", sf::Shader::Fragment);

    return 0;
}

My system looks like this:

• Windows 8 64-bit
• Qt Creator 2.8.1
• GCC 4.8
• SFML 2.1 compiled with GCC 4.8

I'm looking for your suggestions and guidance to help me figure out what would cause this line of code to work in debug mode, but not in release mode.

Thank you! :)

Update #1

I am using qmake for this project. It creates three make files:

• Makefile
• Makefile.debug
• Makefile.release

I'm not very experienced with makefiles, but I can see some information about the libraries that are being linked in the debug and release make files.

Makefile.debug

LIBS        =        C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-main-d.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-graphics-d.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-window-d.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-system-d.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-audio-d.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-network-d.a 

Makefile.release

LIBS        =        C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-main.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-graphics.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-window.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-system.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-audio.a C:/Users/Derek/Documents/Development/Projects/Dots-A-Lot/dependencies/SFML-2.1-windows-gcc-4.8-mingw-32bits/lib/libsfml-network.a 

I also have the debug DLLs in the debug output folder (next to the debug executable) and the release DLLs in the release output folder (next to the release executable). The data folder is in both debug and release folders as well so that it has access to the fragment shader file.

Answer 1

I was able to solve my problem. I had followed these instructions to build SFML:

http://sfml-dev.org/tutorials/2.1/compile-with-cmake.php

I had downloaded g++ 4.8.1 with mingw and used that to compile SFML. However, when I used the .a/.dll files produced by that build, my release build would crash on that line of code.

Today (10-7-2013) I found these instructions:

https://github.com/LaurentGomila/SFML/wiki/Tutorial%3A-Compile-and-Link-SFML-with-Qt-Creator#step-10

I ran through those instructions and used the g++ 4.8.0 compiler that came with Qt Creator (instead of the one I had downloaded). Now I am able to run in release mode without crashing.

I didn't realize that I was using one version of the compiler to build SFML (g++ 4.8.1) and another to build my application (g++ 4.8.0).

Thank you, luiscubal, for pointing me in the right direction by asking me questions about the linker. :)