cygwin和eclipse的sockets.h问题

Question

I keep getting this error: c:\\cygwin\\usr\\include/cygwin/socket.h:55:3: error: expected specifier-qualifier-list before '__uid32_t'

My code is mininmal and still can't compile:

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>

int main(void) {
    puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */
    return EXIT_SUCCESS;
}

I have include C:\\cygwin\\usr\\include to compiler path and linker to C:\\cygwin\\usr\\lib

please advise

Answer 1

Headers under C:\\cygwin\\usr\\include , and libraries under C:\\cygwin\\usr\\lib , are for use in the Cygwin environment -- which means they should be referred to via their Cygwin paths, /usr/include and /usr/lib .

I haven't used mingw, but I don't think it's part of Cygwin, and I wouldn't expect it to be able to use Cygwin's headers and libraries.

If you're going to use mingw, you should use the headers and libraries that are installed with it. Don't specify any Cygwin-related directories.

Or you can use Cygwin's gcc (which is optional; you'll have to install it with setup.exe ). In that case, you can run gcc or make from the command line. I'm not sure whether Cygwin and Eclipse play nicely together.

Answer 2

I know this question is old, and I'm using a newer version, but I had a similar issue and it was resolved by moving #include <sys/socket.h> one line above #include <sys/types.h> .

Something in types.h appears to be blocking socket.h (not sure how). Wish I had more details on the cause, but hope the solution helps some.