Tuesday, 29 March 2016

Undefined References Compiling OpenGL/glfw/glew on Ubuntu(g++)





I am following this tutorial. I cmake'd and make/make install'd glfw and glew perfectly(as far as I'm aware). However, when I try to compile the sample code...



#define GLEW_STATIC
#include
#include

int main()
{
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);

glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);

return 0;
}


... using his linker flags...




-lGLEW -lglfw3 -lGL -lX11 -lpthread -lXrandr -lXi


... I get the following error:



/usr/bin/ld: /usr/local/lib/libglfw3.a(x11_init.c.o): undefined reference to symbol 'XF86VidModeQueryExtension'
/usr/lib/x86_64-linux-gnu/libXxf86vm.so.1: error adding symbols: DSO missing from command line


I Google'd the error and someone suggested adding -lXxf86vm. It got rid of the initial error but added a significant number more:




/usr/local/lib/libglfw3.a(x11_init.c.o): In function `initExtensions':
x11_init.c:(.text+0x1b93): undefined reference to `XineramaQueryExtension'
x11_init.c:(.text+0x1bad): undefined reference to `XineramaIsActive'
/usr/local/lib/libglfw3.a(x11_init.c.o): In function `_glfwCreateCursor':
x11_init.c:(.text+0x22ee): undefined reference to `XcursorImageCreate'
x11_init.c:(.text+0x23c5): undefined reference to `XcursorImageLoadCursor'
x11_init.c:(.text+0x23d5): undefined reference to `XcursorImageDestroy'
/usr/local/lib/libglfw3.a(x11_monitor.c.o): In function `_glfwPlatformGetMonitors':
x11_monitor.c:(.text+0x743): undefined reference to `XineramaQueryScreens'



How do I figure out what flags I need? If it matters this is how my makefile is structured:



CC = g++
COMPILER_FLAGS = -std=c++11
FILES = *.cpp
LINKER_FLAGS = -lGLEW -lglfw3 -lGL -lX11 -lpthread -lXrandr -lXi -lXxf86vm
OBJS = *.o
LINUX_BIN = HelloWindow


#Compile(output into error.txt if there is an error), link, then run
linux:
$(CC) $(COMPILER_FLAGS) -c $(FILES) 2> "errors.txt"
$(CC) $(COMPILER_FLAGS) $(OBJS) -o $(LINUX_BIN) $(LINKER_FLAGS)
./$(LINUX_BIN)


Thanks!


Answer




Derhass was correct. The following are the flags I used:



-lGLEW -lglfw3 -lGL -lX11 -lXi -lXrandr -lXxf86vm -lXinerama -lXcursor -lrt -lm -pthread

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