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Why is curses on linux giving me following error?

Trying to get getch() working to capture key press.

    #include <curses.h>
    ...
    ...
    WINDOW *w;
    char f;

   w = initscr();
   timeout(3000);
   f = getch();
   endwin();

is giving me following error:-

undefined reference to `wgetch'
undefined reference to `stdscr'
like image 754
Alex Xander Avatar asked Oct 03 '09 10:10

Alex Xander


1 Answers

That's a linking error. Are you linking to the curses library correctly?

There are two steps involved in using a library in C.

  1. You #include the relevant header files from your source files. This is so your code knows what signatures of the library functions are. So you're doing this correctly.
  2. When compiling your code, you need to tell the linker to link to the relevant libraries, so it can find the definition of those functions. This is what you're not doing. Assuming you're using gcc then adding -lncurses to the compile line should do it. Here's an explanation of linking.
like image 162
John Carter Avatar answered Sep 23 '22 06:09

John Carter