Thread: Cygwin/gcc Incompatibility With Winsock2.h

  1. #1
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    Cygwin/gcc Incompatibility With Winsock2.h

    I'm running the latest cygwin release on Windows 2000 and am getting ridiculous errors, which make absolutely no sense to me, as I'm including the header files that the installation provided. Whats with this??

    undefined reference to `_send@16'
    undefined reference to `_recv@16'
    undefined reference to `_closesocket@4'
    undefined reference to `_recv@16'
    undefined reference to `_send@16'
    undefined reference to `_recv@16'
    undefined reference to `_send@16'
    undefined reference to `_recv@16'
    undefined reference to `_recv@16'
    undefined reference to `_send@16'
    undefined reference to `_recv@16'
    undefined reference to `_setsockopt@20'
    undefined reference to `_recv@16'
    undefined reference to `_WSAGetLastError@0'
    undefined reference to `_setsockopt@20'
    undefined reference to `_WSAGetLastError@0'
    undefined reference to `_send@16'
    undefined reference to `_itoa'

  2. #2
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    If anyone has ever used gcc and winsock2, can you help me with this situation? What is going on with this, gcc gives very little documentation on winsock2 stuff. FYI the functions are definited in the winsock2.h file in the directory containing my gcc installation.

  3. #3
    and the hat of int overfl Salem's Avatar
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    Well you still need to specify which libraries you want to link with.

    Something like
    Code:
    gcc prog.c -lsocket
    would compile your prog.c, then link with libsocket.a

    Now the actual name(s) of the libraries you'd need to link with would require a bit more research (I don't know them off hand), but you should find a long list of them in /usr/lib within cygwin.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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