undefined reference to `CreateRGBABitmapImageReference'

Asked Sep 13 '21 at 10:23

Active Sep 13 '21 at 10:23

Viewed 59 times

I am trying to plot a graph in C and tested this code:

#include <stdio.h>
#include <stdlib.h>
#include "pbPlots.h"
#include "supportLib.h"

int main()
{

    double x[] = {-1, 0, 1, 2, 3, 4, 5, 6};
    double y[] = {-5, -4, -3, -2, 1, 0, 1, 2};

    RGBABitmapImageReference *imageRef = CreateRGBABitmapImageReference();

    DrawScatterPlot(imageRef, 600, 400, x, 8, y, 8);

    size_t length;
    double *pngData = ConvertToPNG(&length, imageRef->image);
    WriteToFile(pngData, length, "plot.png");
}

pbPlots.c/.h and supportLib.c/.h are in the same folder with my C file.

My OS is Ubuntu 20.04.

When I try to run i get this output:

undefined reference to CreateRGBABitmapImageReference

undefined reference to DrawScatterPlot

undefined reference to ConvertToPNG

After searching for a while I still cant figure out how to solve this.

asked Sep 13 '21 at 10:23

S H

3

Do pbPlots.c and supportLib.c define the functions with undefined references? How do you compile/link the program? – Ian Abbott Sep 13 '21 at 10:30
I build and run it from my CodeBlocks IDE – S H Sep 13 '21 at 10:48
1

You need the library with the plot functions. CodeBlocks is only the IDE. – Mike Sep 13 '21 at 10:50
I need to add it from Settings->Compiler->Linker Settings and link the library? – S H Sep 13 '21 at 10:53

undefined reference to `CreateRGBABitmapImageReference'

0 Answers0