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ccmakencursesundefined-referencepdcurses

undefined reference to `PDC_ungetch' while other functions work in PDcurses

i'm having a strange problem where i get undefined reference to "PDC_ungetch" while I can use without any problem other functions from curses.h, for example:

#include <curses.h>

int main(){
    initscr();
    int ch = getch();
    ungetch(ch);
    return 0;
}

With this code i only get undefined reference to "PDC_ungetch" while initscr() works with no problems, what would be the problem?

My CMake is the following:

cmake_minimum_required(VERSION 3.3)
project(rogue)

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror")

set(SOURCE_FILES main.c gamelib.c gamelib.h maze.c maze.h) //these are other files I use

find_package(Curses REQUIRED)
include_directories(${CURSES_INCLUDE_DIR})

add_executable(rogue ${SOURCE_FILES} gamelib.c gamelib.h maze.c maze.h) //Same here

target_link_libraries(rogue ${CURSES_LIBRARIES})

Thanks in advance for the help.

Solution

  • If you look at the header file <curses.h> from PDCurses, that particular function is the only one treated in that way: defining a macro to use the function with a PDC_ prefix.

    If you happen to be cross-compiling (from Cygwin for example), and if the cmake macros are not setup/used properly, they could find the system curses library, which does not use that naming convention. In that case, you would get just that one error when trying to link.