Hello world!
I am making a simple text based game in CodeBlocks, using C++. Because it would be really boring to play a text adventure with no music, I tried to add a command which is looping music. To be exact, this one:
PlaySound(TEXT("melody.wav"), NULL, SND_FILENAME | SND_ASYNC);
I made sure the melody.wav was in the project's folder, but when I hit play I get the following error:
||=== Build: Debug in test (compiler: GNU GCC Compiler) ===|
ld.exe||cannot find -lwinmm.lib|
ld.exe||cannot find -lwinmm.lib|
ld.exe||cannot find -lwinmm.lib|
ld.exe||cannot find -lwinmm.lib|
||error: ld returned 1 exit status|
||=== Build failed: 5 error(s), 0 warning(s) (0 minute(s), 6 second(s)) ===|
I tried at first to make a linker flag in the build settings, as I thought this was the problem. The same again! I searched everywhere on Google, but got no proper answer! Please help me! Here is my code:
#pragma comment(lib, "winmm.lib")
#include <iostream>
#include <stdio.h>
#include <windows.h>
#include <mmsystem.h>
using namespace std;
int main(){
PlaySound(TEXT("melody.wav"), NULL, SND_FILENAME | SND_ASYNC);// - the correct code
int test = 0;
cin>>test;
return 0;
}
I would be grateful if you could answer on how to get rid of that
ld.exe | cannot find -lwinmm.lib ! :)
Related
I added mysql.a in Project->Build Options->Linker Settings->path to mysql.a
I added "include files containing mysql.h" in Project->Build Options->Linker Settings->path to incldue files.
I also added mysql.dll files in debug folder of the project directory.
But still I am getting this error:
||=== Build: Debug in wss4 (compiler: GNU GCC Compiler) ===|
obj\Debug\main.o||In function `main':|
D:\C++Ws\ws4\wss4\main.cpp|11|undefined reference to `mysql_init'|
D:\C++Ws\ws4\wss4\main.cpp|12|undefined reference to `mysql_real_connect'|
||error: ld returned 1 exit status|
||=== Build failed: 3 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
I am using codeblock 17.12, also tried codeblock 20(latest version) but still getting the same error.
Below is my small code snippet:
#include <iostream>
#include <windows.h>
#include <mysql.h>
using namespace std;
int main()
{
MYSQL* conn;
conn=mysql_init(0);
conn=mysql_real_connect(conn,"localhost","admin","admin","youtube",0,NULL,0);
if(conn){
cout<<"Connected";
}
else{
cout<<"Not connected";
}
}
Please any one show the problem solving steps. It has been taking hours and hours. Thanks
I'm learning opengl and wanted to use Codeblocks IDE because visual studio seems too laggy and slow. After starting a console application project i've tried to link GLFW3 library to make this code run:
#include <GLFW/glfw3.h>
#include <thread>
int main()
{
glfwInit();
std::this_thread::sleep_for(std::chrono::seconds(1));
glfwTerminate();
}
I use GNU GCC 32-bit Compiler from MinGW(one that comes with codeblocks installation). I'm pretty certain that i've done everything correctly, i've read through like every article that i was able to find explaining how to setup codeblocks for opengl. I've linked libglfw3.a and libglfw3dll.a and set up correct search directories for compiler and linker but i always get this undefined reference error no matter what:
-------------- Build: Debug in glfw_again_test (compiler: GNU GCC Compiler)---------------
g++.exe -L"C:\Program Files\CodeBlocks\MinGW\lib" -o bin\Debug\glfw_again_test.exe obj\Debug\main.o "C:\Program Files\CodeBlocks\MinGW\lib\libglfw3.a" "C:\Program Files\CodeBlocks\MinGW\lib\libglfw3dll.a" "C:\Program Files\CodeBlocks\MinGW\x86_64-w64-mingw32\lib\libopengl32.a"
obj\Debug\main.o: In function `main':
C:/dev/OpenGL/CodeBlocks/glfw_again_test/main.cpp:6: undefined reference to `glfwInit'
C:/dev/OpenGL/CodeBlocks/glfw_again_test/main.cpp:8: undefined reference to `glfwTerminate'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 1 second(s))
3 error(s), 0 warning(s) (0 minute(s), 1 second(s))
I have no idea what else i could try to fix this problem.
Apparently i was mistaken and thought that i use 32-bit MinGW compiler but seems like i accidentally installed 64-bit one with codeblocks. After switching to mingw gcc 32-bit compiler and rebuilding(simple build will lead to an error) my project i finally got it to work(not exactly this code snippet but another sample one).
I want to use C++ Code in Java. I know I have to use JNI. And now I want to compile a shared library in C++ on Linux. I using the Code::Blocks 16.01 IDE and the GNU GCC Compiler.
And now I want to compile this very simple code:
#include <iostream>
void sayHello ()
{
std::cout << "Hello from C++" << std::endl;
}
(I know that I also have to include some more to use this library later in java, but this was just my first test, if it compiles)
The Build log is:
g++ -shared obj/Debug/main.o -o bin/Debug/libnativetest.so
/usr/bin/ld: obj/Debug/main.o: Die Umlagerung von
obj/Debug/main.o: error adding symbols: Ungültiger Wert
collect2: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 0 second(s))
1 error(s), 0 warning(s) (0 minute(s), 0 second(s))
The Build messages:
||error: ld returned 1 exit status|
||=== Build failed: 1 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
When I just compile the method without#include <iostream> (and sure without cout) it works.
I have tested with another header file like #include <string> and this works.
When I create a project not as a shared library instead a Console Application I can use <iostream>.
I am new to C++ and Code::Blocks therefore if you need some more info please help me where I can find this information.
I do not use Code blocks, so I have no idea how it decided to leave out the fPIC flag. If you try to build it on the command line with
g++ main.cpp -o main.o
The gcc (v5.4 in my case) prompts you to add -fPIC flag, with with the error disappears and the compilation succeeds. fPIC stands for position independent code. i.e., the function addresses (jump addresses) are not hard coded but are left blank. The loader, when it needs the .so, loads it to the memory and then fills the jump addresses dynamically. (-fpic could also work, it is for short jumps, whereas fPIC accommodates also long jumps, i.e., bigger jump ranges at the cost of binary size.)
On the How-To initialize libosip2 site theres program to initialize osip libraries
https://www.gnu.org/software/osip/doc/html/group__howto0__initialize.html
#include <winsock2.h>
#include <Time.h>
#include <stdio.h>
#include <stdlib.h>
#include <osip2/osip.h>
#include <osipparser2/osip_parser.h>
#include <string.h>
int main()
{
int i;
osip_t *osip;
i=osip_init(&osip);
if (i!=0)
return -1;
}
I'm trying to run this code but it doesnt work,
library version 5.0.0
error:
||=== Build: Debug in cos2 (compiler: GNU GCC Compiler) ===|
obj\Debug\main.o||In function `main':|
C:\Users\emergency\Documents\analizer\cos2\main.cpp|14|undefined reference to `osip_init'|
||error: ld returned 1 exit status|
||=== Build failed: 2 error(s), 0 warning(s) (0 minute(s), 0 second(s)) ===|
In order to link with a library, you need to specify it on the command line.
Note that libosip2 produces two libraries and you have to link with both of them in order to use both parser (libosipparser2) and the sip engine (libosip2).
The exact command line depends on the platform, compiler you use and may also differ if you are linking to a static library or dynamic library.
With GCC and dynamic linking, it should be that way:
-L/install-directory-for-libosip2-libs/ -losipparser2 -losip2
-L/install-directory-for-libosip2-libs/ parameter refers to the directory where libraries are available.
this is because you did not link the binary osip.o
I have just setup SDL on CodeBlocks, and I am getting a build error:
-------------- Build: Debug in SDL learning (compiler: GNU GCC Compiler)---------------
mingw32-g++.exe -L..\deps\lib -o "bin\Debug\SDL learning.exe" obj\Debug\main.o -lmingw32 -lSDL2main -lSDL2
obj\Debug\main.o: In function `SDL_main':
C:/Users/73638G75MA/Documents/prive/programeren/C++ projects/SDL learning/main.cpp:7: undefined reference to `SDL_Init'
c:/mingw/bin/../lib/gcc/mingw32/4.8.1/../../../libmingw32.a(main.o):(.text.startup+0xa7): undefined reference to `WinMain#16'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 0 second(s))
2 error(s), 0 warning(s) (0 minute(s), 0 second(s))
The build log doesn't really tell me anything, maybe some of you guys know a solution.
In case you need my code:
#include <iostream>
#include <SDL.h>
using namespace std;
int main(int argc, char *argv[]){
if(SDL_Init(SDL_INIT_EVERYTHING)!=0){
cout << "Could not initiate SDL" << endl;
}
return 0;
}
I got my include and lib files in folder named deps.
Also, it does recognize the SDL.h file and its commands, because when I type #include <S it suggests SDL.h. It also autocompletes the SDL commands.