I am trying to make a simple C++ program that plays music, but I'm getting this error.
undefined reference to __imp_PlaySoundA'
From what I read I found out that I don't have any source code that implements PlaySound. I know I should add a reference to winmm.lib to my linker, but I only found how to do this in VisualStudio. Is there a way how to do it in CLion? I'm not even sure if CLion has something like that.
#include <iostream>
#include <windows.h>
int main() {
PlaySound("file_name.mp3", nullptr, SND_FILENAME | SND_ASYNC);
return 0;
}
This doesn't help:
What is an undefined reference/unresolved external symbol error and how do I fix it?
I have already solved it, you need to add winMM.Lib to the CMake file. Plus the file can't be .mp3 but .wav (maybe some others, I did't try).
# Link to GLFW, GLEW and OpenGL
target_link_libraries(template PUBLIC
${GLFW_LIBRARIES}
${GLEW_LIBRARIES}
${OPENGL_LIBRARIES}
winMM.Lib)
Related
I am trying to switch to Windows environment from Linux, but find it a very hard path.
This time I wanted to test if I can work with boost library.
I had problems with compiling boost on windows, so I downloaded precompiled version. I unpacked everything and tested positively that I can compile the header-only librariers.
Then I copied some simple boost::asio example. I set up everything in Eclipse. Compilation went fine, but during linking I got 'undefined reference' problem to 'boost::system' internal stuff.
C:/Users/jacek/cpp/boost_1_62_0/boost/system/error_code.hpp:221: undefined reference to `boost::system::generic_category()'
C:/Users/jacek/cpp/boost_1_62_0/boost/system/error_code.hpp:222: undefined reference to `boost::system::generic_category()'
C:/Users/jacek/cpp/boost_1_62_0/boost/system/error_code.hpp:223: undefined reference to `boost::system::system_category()'
So I added '-lboost_system', as well as the path to the libraries directory, to my linking options. But this did not help.
g++ "-LC:\\Users\\jacek\\cpp\\boost_1_62_0\\lib64-msvc-14.0" -o TestAsio.exe "src\\Main.o" -lboost_system
I checked the libraries directory and found there is a bunch of files containing 'boost_system' in the name. They are:
libboost_system-vc140-mt-1_62.lib
libboost_system-vc140-mt-gd-1_62.lib
libboost_system-vc140-mt-s-1_62.lib
libboost_system-vc140-mt-sgd-1_62.lib
libboost_system-vc140-s-1_62.lib
libboost_system-vc140-sgd-1_62.lib
I did not know which I should use. I tried adding 'libboost_system-vc140-mt-1_62' to the linking options, I tried all other files, I tried renaming the files to the linux pattern 'libboost_system.a', but nothing worked.
g++ "-LC:\\Users\\jacek\\cpp\\boost_1_62_0\\lib64-msvc-14.0" -o TestAsio.exe "src\\Main.o" -llibboost_system-vc140-mt-1_62 -llibboost_system-vc140-mt-gd-1_62 -llibboost_system-vc140-mt-s-1_62 -llibboost_system-vc140-mt-sgd-1_62 -llibboost_system-vc140-s-1_62 -llibboost_system-vc140-sgd-1_62
What am I doing wrong here?
Please help...
YotKay
I solved it myself with the help of a comment from this post: boost asio example compilation error
It looks like the precompiled version of Boost is created with Visual Studion and is NOT COMPATIBLE with G++. I if I decided to install MinGW then I cannot use the precompiled version of boost, but must compile it myself using g++.
I did that.
Now I have libraries compiled with G++.
I specify the path to the boost system library like that:
c:\Users\jacek\cpp\boost_1_62_0\libraries\boost\bin.v2\libs\system\build\gcc-mingw-6.2.0\debug\link-static\
and add this option:
-lboost_system-mgw62-d-1_62
Now the problem with boost::system disappears. However, another one pops up with boost asio, but luckily the answer is here: MinGW linker error: winsock
The example works fine now on my Windows 10 laptop.
#include <boost/asio/io_service.hpp>
#include <boost/asio/steady_timer.hpp>
#include <chrono>
#include <iostream>
using namespace boost::asio;
int main()
{
io_service ioservice;
steady_timer timer{ioservice, std::chrono::seconds{3}};
timer.async_wait([](const boost::system::error_code &ec)
{ std::cout << "3 sec\n"; });
ioservice.run();
}
I have played around with C++ for a while and just recently started to get into SDL and SDL2.
I was able to get the dot demo program to work.
But other programs, such as Lazy Foo' Productions's copied and pasted don't seem to work.
I have both SDL and SDL2 installed (and uninstalled and reinstalled.) I am on Ubuntu 15.04 and I have the IDE CodeBlocks linked (-ISDL2)
The errors are SDL_Window - SDL_WINDOWPOS_UNDEFINED - SDL_WINDOW_SHOWN - SDL_CreateWindow - SDL_GetWindowSurface - SDL_UpdateWindowSurface and finally, SDL_DestroyWindow -- was not declared in this scope.
Also, I include:
#include </usr/include/SDL/SDL.h>
#include </usr/include/SDL2/SDL.h>
#include <stdio.h>
I'm pretty sure that I don't need all of that location, but it didn't work without it either. One other note, when I type the #includes, CodeBlocks will suggest SDL2/SDL.h but not SDL/SDL.h.
What am I missing?
I don't think I can put Lazy Foo' code here - I didn't get permission...
The code you listed;
#include </usr/include/SDL/SDL.h>
#include </usr/include/SDL2/SDL.h>
#include <stdio.h>
Why don't you change it to
#include <SDL2/SDL.h>
#include <stdio.h>
as the first header is where SDL_CreateWindow and other SDL2 functions are declared?
Also you don't need to include both SDL and SDL2 headers. Indeed that could very well be the source of your problem as you would only need to include the version you're using.
If you're following the tutorials from lazyfoo's site, you can check if the ones you're following are using SDL1.2 or SDL2 from their table of contents, as the site actually have the tutorials for both versions.
UPDATE:
I didn't notice that your platform is a Linux platform. Then it is so much easier to solve your problem. The demo that you followed previously was done using SDL-1.2, whereas the gcc error hinted that you're using SDL-2.0, hence SDL_CreateWindow and other undefined errors. You should install SDL-2.0 library and SDL-2.0 development files (which will provide you with the necessary SDL-2.0 headers). You may refer this to SDL-2.0 packages provided by your platform distribution.
As for the compilation, it'll be the same as the tutorial you've followed with a minor change, instead of gcc sdltest.o -lSDL -o sdltest, you'll issue gcc sdltest.o -lSDL2 -o sdltest to indicate that you're linking your code against SDL2 library.
EDIT
A simple SDL program to test your environment. You can use any of the simpler text editor such as nano or gedit or others to edit this, and run the compilation command above to test your setup.
The simplest way to do this is by copy the code, then from your terminal, issue cat > sdltest.cpp and paste the code, then hit [ENTER] and [CTRL-C] to end it. Then you can issue the compilation command as mentioned previously,g++ sdltest.cpp -lSDL2 -o sdltest.
Code;
#include <SDL2/SDL.h>
#include <stdio.h>
int main()
{
SDL_Window *p;
SDL_Renderer *w;
p = SDL_CreateWindow("Game",SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,800,640,SDL_WINDOW_SHOWN);
w = SDL_CreateRenderer(p, -1, 0);
SDL_RenderClear(w);
SDL_SetRenderDrawColor(w,255,0,0,255);
SDL_Rect Rect = {220,140,200,200};
SDL_RenderFillRect(w,&Rect);
SDL_RenderPresent(w);
SDL_Delay(3000);
SDL_DestroyRenderer(w);
SDL_DestroyWindow(p);
SDL_Quit();
return 0;
}
Hope that helps.
trying to use this tutorial on 64-bit windows 8 with netbeans and cygwin 4.8.1.
i get many errors like this: /usr/include/w32api/GL/glu.h:68:79: error: expected ‘)’ before ‘*’ token.
on statements like this: void APIENTRY gluQuadricCallback(GLUquadric *qobj,GLenum which,void (CALLBACK *fn)());
the pointer on error message points to the * before the fn().
edit: including windef.h gets rid of the compiler error messages.
i am left with a bunch of undefined references like: glfwInit
edit2: using André Fischer's ideas, i can get a clean compile (you need to add the directory and a -l option for the linker).
i now have a: skipping incompatible ../../../../../Windows/SysWOW64/opengl32.dll when searching for -lopengl32 and: undefined reference to `_imp_vsnprintf'. so it looks like i have a 32/64 bit problems and an undefined external.
there must be a saner way to get opengl working on windows.
I assume you mean Tutorial 1: Opening a Window and are using Netbeans' builtin build system instead of CMake.
The order in which you include the header files is important (source). Try it like this:
#include <windef.h> // According to comments above
#include <GL/glew.h> // Before any gl headers
#include <GL/gl.h>
//#include <GL/glext.h> // Linux headers
//#include <GL/wglext.h> // Windows headers - Not sure which ones cygwin needs. Just try it
#include <GL/glu.h> // Always after gl.h
#include <GL/glfw.h> // When all gl-headers have been included
Create a directory named "include" in your project directory with a subfolder "GL".
Grab the binaries (32 bit, MinGW) from the GLFW Download Site and put the .dll/.so into your build-folder (Or extract them somewhere and add them to the search directories) and the header files into "include/GL".
Also the glfw code in the tutorial is slightly outdated; It does not work with glfw3 anymore.
You'll have to update it using GLFW's conversion guide/try this version (which I haven't been able to test, since I'm currently not at home) or use glfw2.
Finally download the GLEW sources and build it by following the instructions in the README.txt. Put the .dll/.so into your build-folder (or add to search directories) and the header files into "include/GL".
Add following to your Compiler-Flags:
-Iinclude/
Finally add following arguments to your Linker:
-L/lib -lglu32 -lopengl32 -lGL -lGLU -lglfw -lglew
You should be able to compile the tutorial now.
Edit: Added instructions for building GLEW, GLFW and completed my answer to include building everything from scratch.
Edit2: Linked glfw3-version of the tutorial-code.
Edit3: Added missing linker options.
I've spent the last 24 work hours trying to get this to compile, using multiple searches and tutorials (Some say I need to link it dynamically while others say I need to statically), I can not get this to work. I'm relatively new to compiling and linking so any help would be appreciated.
Here is my code(As you can tell by my comments I was very tired last night with coding this):
#define NO_SDL_GLEXT
#define GLEW_STATIC
#include "GL/glew.h"
#include "SDL/SDL.h"
#include "SDL/SDL_opengl.h"
int main (int argc, char* args[]){
//Loads the SDL video module
SDL_Init(SDL_INIT_VIDEO);
//Creates the SDL Surface for OpenGL to draw to
SDL_Surface* surface = SDL_SetVideoMode(800,600,32, SDL_HWSURFACE | SDL_DOUBLEBUF | SDL_OPENGL );
//Sets the caption...
SDL_WM_SetCaption("OpenGL",0);
glewExperimental = GL_TRUE;
glewInit();
//Main event loop, this is the BREAD AND BUTTER LADIES AND GENTLEMEN
SDL_Event windowEvent;
while (true){
if (SDL_PollEvent(&windowEvent)){
//If you close the appplication, causes it to actually stop running :D
if (windowEvent.type == SDL_QUIT) break;
//Close it with the ESC key! :D:D:D:D:D:D:D:D:D:
if (windowEvent.type == SDL_KEYUP && windowEvent.key.keysym.sym == SDLK_ESCAPE) break;
}
//Literally the one extra line of code needed to do double buffering
SDL_GL_SwapBuffers();
}
//I wish I knew what this ended...LOPE JK
SDL_Quit();
return 0;
}
And in the search directories I have:
Compiler:
E:\Programs\CodeBlocks\glew-1.10.0\include
E:\Programs\CodeBlocks\SDL-1.2.15\include
Linker:
E:\Programs\CodeBlocks\glew-1.10.0\lib\Release\x64
E:\Programs\CodeBlocks\SDL-1.2.15\lib
And finally in the Linker settings I have
Link libraries:
E:\Programs\CodeBlocks\glew-1.10.0\lib\Release\x64\glew32s.lib
Other linker options:
-lmingw32 -lglew32s -DGLEW_STATIC -lSDLmain -lSDL
The error I am currently getting is:
In function 'SDL_main':
undefined reference to `glewExperimental'
undefined reference to `glewInit#0'
Thank you in advance for all the help!
You are getting linker errors. It looks like you are compiling your application using the Mingw compiler. But, are you sure the glew library you are using was also built with/for Mingw? If you didn't build glew yourself and downloaded a prebuilt binary, it was most probably built using Visual Studio. Note that its not straightforward to mix libraries from different compilers like this.
Look at this:
http://www.mingw.org/wiki/MSVC_and_MinGW_DLLs
P.S: Unless philosophical reasons against proprietary software is preventing you from doing so, you really ought to consider using Visual Studio compilers. The express editions of Visual Studio compilers are free (beer-like). You can use the Visual Studio compiler in really great IDEs like QtCreator.
I am learning C++, and I decided to make a little program that zip/unzip files to train me.
I downloaded libzip and zlib and linked them to my compiler (MinGW with Code::Blocks on Windows). So I tried to open my zip file with zip_open() and got an error :
undefined reference to _imp__zip_open
Here is the code:
#include <zip.h>
#include <zlib.h>
int main()
{
int error(0);
zip *foo = zip_open("foo.zip", 0, &error);
return 0;
}
I don't know where this is coming from and I would really like some help, because I don't find anything on Google (surely cause the problem is simple).
Thanks in advance!
It looks like you haven't linked to libzip. Make sure you are infact linking to it, and that the path to the lib is in your link path.
Judging by the discussion on this thread from the libzip-discuss list it looks like you are trying to link against a static version of libzip but with the preprocessor symbol ZLIB_DLL defined. You should only have ZLIB_DLL defined if linking against the dll version.