Undefined references to stb_image functions? [duplicate]

Question

I want to load images using stb_image. I downloaded stb_image.h from https://github.com/nothings/stb.

When I run the code:

string file="image.png";
int width,height,components;

unsigned char *imageData = stbi_load(file.c_str(),
        &width, &height, &components, STBI_rgb_alpha);

...I get the following errors:

Main.cpp:(.text+0xa14): undefined reference to `stbi_load'
Main.cpp:(.text+0xb74): undefined reference to `stbi_image_free'

BDL · Accepted Answer · 2021-04-24 17:37:03Z

39

You probably should add: #define STB_IMAGE_IMPLEMENTATION to your code before the include. This is suggested in one of the first lines of the header file.

edited Apr 24, 2021 at 17:37

BDL

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answered Jun 18, 2017 at 17:53

D.J. Klomp

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5 Comments

Roy Varon Over a year ago

It worked! Now I can compile it but when I try loading an image the program crashes, any ideas?

D.J. Klomp Over a year ago

What is the error with which the program crashes?

Roy Varon Over a year ago

I get a Segmentation fault. but it was caused by the next line: glTextureParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);

derhass Over a year ago

glTextureParameteri is a GL 4.5 function which must be loaded via the GL extension mechanism, and you are even using it wrong. You are probably looking for glTexParameteri

Roy Varon Over a year ago

Thank you so much it works perfectly now!

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