Mingw Sockets Library Semaphore.h

[dkovacevic]

I want to add the Sockets library (version 2.3.9.5) at http://www.alhem.net/Sockets/index.html to my compiler (Mingw32 version 4.5.2).

I am not using cygwin, I am using the windows port of mingw32.

I was able to compile the library using mingw32-make.

However, I am having difficulty in compiling an example that came with the library source. Specifically, "echoserver.cpp".

When I initially tried to compile this program, I did not tell mingw where the newly compiled library was; obviously a lot of errors where thrown.

I looked into how to add said library to mingw.

With that info, I decided to dump the library into the <mingw install root>\lib directory. I included all of the .o and .d files along with "libSockets.a".

Next, I dumped everything else (.cpp, .h) into the <mingw install root>\include directory. Here I had one problem crop up- "semaphore.h" was a duplicate (it was in the newly compiled directory, and there was a copy in the <mingw install root>\include directory).

I renamed the copy that had already been there (which is larger than the one that I compiled).

Now, when I try to compile echoserver.cpp, I have far fewer errors than my first attempt to compile. Note- vast majority of errors in each case are "undefined referrence to XXX".

This suggests to me that I went a step in the right direction.

Now, I have had to tell mingw to use the library when I go to compile, using the "-l" switch. I think the issue I have now involves the semaphore.h file, which has stuff in it that referrence a threading library, namely "pthreads".

I am not sure if the pthreads lib I grabbed is the right one. In fact, I have two files I dloaded- one is "libpthreadGC2.a" and the other is "libpthreadGCE2.a", and I forget where I got them from (though I do remember trusting the site).

So, what I need is a brief explanation of what is going on here- why wasn't "pthreads" in the system32 directory? What should I do with the semaphore.h files?

Some commands:

mingw32-c++ echoserver.cpp -o /c/echoserver.exe -lSockets -lws2_32 -lwsock32 -lpthreadGC2 -lpthreadGCE2

produces:

In file included from c:\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/Socket.h:46:0,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/ISocketHandler.h:40,
                 from c:\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/ListenSocket.h:42,
                 from echoserver.cpp:27:
c:\mingw\bin\../lib/gcc/mingw32/4.5.2/../../../../include/Thread.h:115:2: error: 'Semaphore' does not name a type

(Note- above output due to using the semaphore.h file that came from mingw, NOT the file I compiled).

The below example is with the semaphore.h file that I compiled.

[code]


produces:

C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI8MySocketE4BindER13SocketAddressRKSsi[ListenSocket<MySocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0xfe): undefined reference to `StrError(int)'
C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI8MySocketE4BindER13SocketAddressRKSsi[ListenSocket<MySocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x1ad): undefined reference to `StrError(int)'
C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI8MySocketE4BindER13SocketAddressRKSsi[ListenSocket<MySocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x2dc): undefined reference to `StrError(int)'
C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI8MySocketE4BindER13SocketAddressRKSsi[ListenSocket<MySocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x38b): undefined reference to `StrError(int)'
C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI15HttpDebugSocketE4BindER13SocketAddressRKSsi[ListenSocket<HttpDebugSocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0xfe): undefined reference to `StrError(int)'
C:\Users\DKOVAC~1\AppData\Local\Temp\ccAO9Vef.o:echoserver.cpp:(.text$_ZN12ListenSocketI15HttpDebugSocketE4BindER13SocketAddressRKSsi[ListenSocket<HttpDebugSocket>::Bind(SocketAddress&, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int)]+0x1ad): more undefined references to `StrError(int)' follow
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(Thread.o): In function `Thread':
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:54: undefined reference to `Semaphore::Semaphore(long)'
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:73: undefined reference to `Semaphore::Post()'
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:54: undefined reference to `Semaphore::~Semaphore()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(Thread.o): In function `~Thread':
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:77: undefined reference to `Semaphore::~Semaphore()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(Thread.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:146: undefined reference to `Semaphore::Post()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(Thread.o): In function `~Thread':
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:77: undefined reference to `Semaphore::~Semaphore()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(Thread.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/Thread.cpp:170: undefined reference to `Semaphore::Wait()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(ResolvServer.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/ListenSocket.h:341: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(ResolvServer.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/ListenSocket.h:290: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(ResolvServer.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/ListenSocket.h:293: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(ResolvServer.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/ListenSocket.h:299: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(ResolvServer.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/ListenSocket.h:302: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(SocketHandlerThread.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/SocketHandlerThread.cpp:63: undefined reference to `Semaphore::Post()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(SocketHandlerThread.o): In function `~SocketHandlerThread':
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/SocketHandlerThread.cpp:48: undefined reference to `Semaphore::~Semaphore()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(SocketHandlerThread.o): In function `SocketHandlerThread':
c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/SocketHandlerThread.cpp:43: undefined reference to `Semaphore::Semaphore(long)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(SocketHandlerThread.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/SocketHandlerThread.cpp:75: undefined reference to `Semaphore::Wait()'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:371: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:556: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:531: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:229: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:327: undefined reference to `StrError(int)'
c:/mingw/bin/../lib/gcc/mingw32/4.5.2/../../../libSockets.a(UdpSocket.o):c:\Users\dkovacevic\Downloads\Binaries_and_Sources\C++\Sockets-2.3.9.5/UdpSocket.cpp:581: more undefined references to `StrError(int)' follow
collect2: ld returned 1 exit status

Any advice?

[aamir121a]

First of all get an IDE like Net beans , if you developing in win32 then link against wsock32 there header are included in windows.h or you can winsock.h , IF you are going to do and network programming go for high level toolkits at QT or wxwidgets , even SDL minght do the trick