Cygwin sockets: getaddrinfo undeclared

[Adam01]

Im using cygwin to test the code of a server I am writing.
I've included sys/types.h, sys/socket.h, netdb.h, and arpa/inet.h.

And this is the output..

../../../sockets.cpp: In constructor `network_class::network_class()':
../../../sockets.cpp:64: error: aggregate `addrinfo hints' has incomplete type a
nd cannot be defined
../../../sockets.cpp:69: error: `getaddrinfo' undeclared (first use this functio
n)
../../../sockets.cpp:69: error: (Each undeclared identifier is reported only onc
e for each function it appears in.)
../../../sockets.cpp:70: error: `gai_strerror' undeclared (first use this functi
on)
../../../sockets.cpp: In destructor `network_class::~network_class()':
../../../sockets.cpp:83: error: `freeaddrinfo' undeclared (first use this functi
on)
main.o:main.cpp:(.text+0x148): undefined reference to `network_class::gethostnam
e()'
collect2: ld returned 1 exit status

I checked the sys/socket file, and it includes cygwin/socket, which doesnt declare any functions. And getaddrinfo is not declared in sys/socket.

I take it I am missing some sort of package, but which one?

(And by the way, is there any other way to tell g++ where to put the .object files rather than being the object dir when running g++?)

[Adam01]

Ok turned out I needed to use the -mno-cygwin option for g++.
But help the on the object file directory would be nice.

Edit: Now I seem to be undefined linking errors:

memoryhandler.o:memoryhandler.cpp:(.text+0xc1c): undefined reference to `_GetPro
cessMemoryInfo@12'
errorhandler.o:errorhandler.cpp:(.text+0xf70): undefined reference to `_WSAGetLa
stError@0'
errorhandler.o:errorhandler.cpp:(.text+0x1840): undefined reference to `_WSAGetL
astError@0'
sockets.o:sockets.cpp:(.text+0xb8): undefined reference to `_WSAStartup@8'
sockets.o:sockets.cpp:(.text+0x139): undefined reference to `_WSACleanup@0'
sockets.o:sockets.cpp:(.text+0x1a9): undefined reference to `_gethostname@8'
sockets.o:sockets.cpp:(.text+0x23c): undefined reference to `_getaddrinfo@16'
sockets.o:sockets.cpp:(.text+0x2ee): undefined reference to `_gethostbyname@4'
sockets.o:sockets.cpp:(.text+0x300): undefined reference to `_inet_ntoa@4'
sockets.o:sockets.cpp:(.text+0x37b): undefined reference to `_gethostname@8'
sockets.o:sockets.cpp:(.text+0x40e): undefined reference to `_getaddrinfo@16'
sockets.o:sockets.cpp:(.text+0x4c0): undefined reference to `_gethostbyname@4'
sockets.o:sockets.cpp:(.text+0x4d2): undefined reference to `_inet_ntoa@4'
sockets.o:sockets.cpp:(.text+0x525): undefined reference to `_freeaddrinfo@4'
sockets.o:sockets.cpp:(.text+0x541): undefined reference to `_freeaddrinfo@4'
collect2: ld returned 1 exit status

I have no idea why WSAstartup is showing up (the function and the header are in #ifdef _WIN32 wrappers.

[Adam01]

Sorry I couldnt edit the post above, but compiling on centOS, compiles and links fine. But running, the only output I get is:
Segmentation fault

No warnings/ouput popped up whilst g++ was compiling/linking.

[Adam01]

Ok delete this thread, I worked it out.

[Banfa]

Rather than us deleting the thread why don't you post the answer for others to read?

[Adam01]

Ok, I used valgrind to track down the memory errors.

Turns out that gethostbyname(" ") returned null on centos and I did check it before using it.

I still cant compile this on cygwin.

[Banfa]

I wish I could help but I have always felt that cygwin was the work of the devil and avoid it as much as possible, hence I don't know much about it, sorry.

[Adam01]

Ok I found out that _WIN32 is defined in cygwin.
And #undef _WIN32 doesnt work >(
Ideas?

Actually I'l use virtualbox.