CODEWITHSUNDEEP
qtqmakelibpng
Luca
Luca

Reputation: 10996

quake linking to libpng

I am using qt and qmake to generate the makefile for my C++ project and I recently pulled in a sub-project from another group which uses libpng functionality in their code. When I tried to compile it, it gave undefined reference for PNG functions like:

undefined reference to symbol png_set_sig_bytes

So, I was guessing that I need to link to limping. What I did was added something like:

LIBS += png

Also tried 

LIBS += libpng

Both of these commands ended up with No such file for directory error.

Can someone point out how I can link to the png library from a make pro file?

Upvotes: 1

Views: 431

Answers (1)

Luca
Luca

Reputation: 10996

Ok, I figured it out, I needed to do:

LIBS += -lpng

This is assuming that the library can be found in the path where the compiler looks. Else, the path needs to be added with a -L flag as well.

Upvotes: 1

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