Thread: undefined reference to `WSAStartup@8'

If memory serves correct, the libraries in DevC++ have a different naming convention to other compilers. In most compilers you would use "wsock32.lib", but I think in DevC++ it's called "libwsock32.a" or something similar.

Try find this lib and link to it.

>>Dev C++ 4<<

Possibly because you're using the 'Methuselah' version. Try upgrading to the latest beta version (go for the 'full' version) and anonytmouse's instructions should make a lot more sense.

Alternatively, just look around for a 'linker' field in your project options; it's likely that it will be there (somewhere!) and that you can add the required lib either by navigaing to the libs directory and selecting it or manually typing in the name of the lib as described by anonytmouse. However, if you are using the older v4 then it's likely that the compiler and other tools (MinGW) will be older, too; in this case linking libs may well be the least of your problems.

If, by chance, you're not using v4 then look again - I can only assure you that there is a 'parameters' tab as anonytmouse has described.

Originally Posted by wicked

Thank you all it's now working wonderfully but one of my original problems remain. When creating a project my code wont compile unless it's a C++ project. As I said before it's written in C.

wicked

Are you sure there isnt any C++ creeping in there? An iostream here or there or an unintentional reference?

AFAIK, DevC++ doesnt usually have a problem with straigh C as long as it's legal and the compiler is setup normally

Originally Posted by wicked

Thank you all it's now working wonderfully but one of my original problems remain. When creating a project my code wont compile unless it's a C++ project. As I said before it's written in C.

wicked

when you create a project a "new project" box pops up. At the bottom right you can choose to compile it as a C or a C++ project and or make either language compile as the default. Check these boxes and make sure they are on the desired language.
I'm pretty posotive that is what is causing your problem.

Sure. You could also post what compiler errors you're getting, though

Code:

#include <stdio.h>
#include <winsock.h>
#include <stdlib.h>

#pragma comment(lib, "wsock32.lib")

int main() {

	WSADATA wsadata;
	int error;

	error = WSAStartup(MAKEWORD(1,1),&wsadata);
	if(error == SOCKET_ERROR) {
		printf("Error starting winsock\n",WSAGetLastError());
		return -1;
	}

	int Socket;

	if((Socket = socket(AF_INET, SOCK_STREAM, 0))<0) {
		printf("Error opening socket\n",WSAGetLastError());
		return -1;
	}

	sockaddr_in addr;
	addr.sin_family = AF_INET;
	addr.sin_port = htons(1234);
	addr.sin_addr.s_addr = INADDR_ANY;

	if((bind(Socket,(sockaddr*)&addr, sizeof(addr)))<0) {
		printf("Bind error\n",WSAGetLastError());
		return -1;
	}

	if((listen(Socket,1))<0) {
		printf("Error listening\n",WSAGetLastError());
		return -1;
	}
	else
		printf("Listening\n");
  
    getch();
    
    closesocket(Socket);
	WSACleanup();
	return 0;
}

And the errors:

Compiler: Default compiler
Building Makefile: "C:\Documents and Settings\Administrator\Desktop\Code\server\Makefil e.win"
Executing make...
make.exe -f "C:\Documents and Settings\Administrator\Desktop\Code\server\Makefil e.win" all
gcc.exe -c server1.c -o server1.o -I"C:/Dev-Cpp/include"

server1.c: In function `main':

server1.c:25: error: `sockaddr_in' undeclared (first use in this function)

server1.c:25: error: (Each undeclared identifier is reported only once

server1.c:25: error: for each function it appears in.)

server1.c:25: error: parse error before "addr"

server1.c:26: error: `addr' undeclared (first use in this function)

server1.c:30: error: `sockaddr' undeclared (first use in this function)

server1.c:30: error: parse error before ')' token

make.exe: *** [server1.o] Error 1

Execution terminated

change those <> to [] on your code tags and we will all love you

In traditional C, all variable declarations must follow a block opening ( a '}' ) and be made before any statements. Your code has variable declarations such as sockaddr_in addr; and int Socket; below statements. This will work in C++ and even C99, but not traditional C.

Code:

int main() {
    int v1;
    char v2;  /* Variable declarations fine here. */

    printf("Test");

    short v3; /* Invalid: Variable declarations after statements are not allowed. */

    if (v2 == 0)
    {
         int v4; /* Variable declaration allowed because it is at start of new block. */

         v2 = 1;
         v4 = 100;
    }

    v4 = 0; /* Will fail. A variable is not in scope outside the block in which it is declared. */

    {
          void* v5; /* Valid. We can start a new block without an if, etc. */

          v5 = NULL;
    }
}