Problem when compiling with olcPixelGameEngine after installing X11 library in ubuntu.

[solracnauj1990]

Hi. I have a problem with compiling a cpp file using the olcPixelGameEngine library. Everything in ubuntu.

First, i wanted to include the librarie in the program but whhen I compiled it I got the next problem in the terminal.

The command I used:
g++ -o resultado helloworld.cpp

What I got:
helloworld.cpp:5:10: fatal error: olcConsoleGameEngine.h: No such file or directory 5 | #include "olcConsoleGameEngine.h" | ^~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated.

Then I downloaded the olcPixelGameEngine.h file and coppied it to /usr/include.
When I tried to compile again I got the next problem:

In file included from helloworld.cpp:5: olcPixelGameEngine.h:530:12: fatal error: X11/X.h: No such file or directory 530 | #include <X11/X.h> | ^~~~~~~~~ compilation terminated.

After that I searched in internet and found the command:

sudo apt install libx11-dev
When I runned it everything went ok.
But now when I try to compile I get the next problem:

/usr/bin/ld: /tmp/ccigeM0H.o: in function __static_initialization_and_destruction_0(int, int)':
helloworld.cpp:(.text+0x1c5): undefined reference to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)' /usr/bin/ld: helloworld.cpp:(.text+0x1e6): undefined reference to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)'
/usr/bin/ld: helloworld.cpp:(.text+0x207): undefined reference to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)' /usr/bin/ld: helloworld.cpp:(.text+0x228): undefined reference to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)'
/usr/bin/ld: helloworld.cpp:(.text+0x249): undefined reference to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)' /usr/bin/ld: /tmp/ccigeM0H.o:helloworld.cpp:(.text+0x26a): more undefined references to olc::Pixel::Pixel(unsigned char, unsigned char, unsigned char, unsigned char)' follow
collect2: error: ld returned 1 exit status`

Then I searched but found nothing.
I show you the entire story to know if I did something wrong or just to find a solution.
Hope you could help me.

[gorbit99]

this means that you don't have

#define OLC_PGE_APPLICATION

line at the top of your main file.
For more information, check out: https://github.com/OneLoneCoder/olcPixelGameEngine/wiki/Compiling-on-Linux and https://github.com/OneLoneCoder/olcPixelGameEngine/wiki/Multiple-File-Projects and probably https://github.com/OneLoneCoder/olcPixelGameEngine/wiki/Hello-World

[solracnauj1990]

Thank you so much!!! It worked!! :)

[gurkanctn]

It's quite interesting that you're including olcConsoleGameEngine instead of the olcPixelGameEngine, and then the problem is fixed by a PGE application definition. :)