freeaddrinfo and getaddrinfo unrecognized | Together C & C++ | Page 1

lime hamlet May 8, 2025, 12:33 PM

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Hi, i have a coding project for school using TinkerForge hardware. Some of their hardware pieces use freeaddrinfo and getaddrinfo in their header files, and seem to be necessary to run the code.
i have tried to get this working but my system seems to not know these functions at all, no matter what i try. these functions are supposed to be included on any windows system (which im using) so i have no idea why its not working for me
i have asked chatgpt and forums for help countless of times and even asked some friends who understand coding better than i do but they havent seemed to be able to figure it out either. im afraid theres something wrong with my winsock version or sum but tbh idk how to find out what exactly is the problem

mild juncoBOT May 8, 2025, 12:33 PM

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blazing ingot May 8, 2025, 12:53 PM

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those are POSIX functions. i don't know if they 'supposed to be included on any windows system' as you claim

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huh. they do https://learn.microsoft.com/en-us/windows/win32/api/ws2tcpip/nf-ws2tcpip-getaddrinfo
https://learn.microsoft.com/en-us/windows/win32/api/ws2tcpip/nf-ws2tcpip-freeaddrinfo
i was wrong apparently. did you include the relavant header?

lime hamlet May 8, 2025, 1:05 PM

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ye i believe so

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chatgpt has only told me to include them like 20 times lol

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#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>``` 
these should be all that you really need

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windows.h isnt even necessary i think

blazing ingot May 8, 2025, 2:00 PM

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do you link them as well? https://www.tinkerforge.com/en/doc/Software/API_Bindings_C.html#api-bindings-c

lime hamlet May 8, 2025, 2:31 PM

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if u mean adding them to the gcc command then yes

blazing ingot May 8, 2025, 2:44 PM

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both of them? i.e. -lws2_32 -ladvapi32? whats the error message then?

sullen finch May 10, 2025, 5:05 AM

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What compiler are you using

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GCC provided by MinGW/MSYS?

lime hamlet May 11, 2025, 6:53 AM

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Ye

sullen finch May 11, 2025, 9:01 AM

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What is the actual error? Can it not find the includes or is it undefined references?

lime hamlet May 12, 2025, 9:11 AM

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implicit declaration

sullen finch May 12, 2025, 9:28 PM

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Are you sure it's the Win32 freeaddrinfo and not the POSIX one?

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And which MSYS shell are you using

#freeaddrinfo and getaddrinfo unrecognized