The order of .o files doesn't matter. It's shared and static libraries which sometimes have to be specified in a certain order.

The actual problem was that

a) hidio_windows.c used _WINDOWS instead of _WIN32 as a guard around the whole code, so hidio_windows.o was empty.

b) then there was a wrong header (<ddk/hidsdi.h>  instead of <hidsdi.h>)

c) some methods are not implemented, so I copied the dummy implementation from hidio_linux.c. It seems like those methods are only relevant for OSX.

d) there were missing linker flags "-lhdi -lSetupAPI".

Also, I couldn't get the autotools makefile to work, so I just compiled manually on the command line. Finally I got a binary :-)

To be honest, I don't think that anyone ever compiled this code on Windows, so it is probably untested. Anyway, when I have time I can clean this up and make a PR (or just fork it). Then we probably need some testing before we upload it to Deken...

Christof

On 01.02.2020 02:50, Martin Peach wrote:
Line 76 of the log:
gcc  -DPD -g -O2 -I/z/Desktop/pure-data/src -mms-bitfields  -L/z/Desktop/pure-data/src -L/z/Desktop/pure-data/bin -L/z/Desktop/pure-data/obj   -s -shared -o hidio.dll hidio.o hidio_types.o   hidio_windows.o  -L/src -L/bin -L/obj -lpd
hidio.o: In function `hidio_tick':
Z:\Desktop\hidio/hidio.c:513: undefined reference to `hidio_get_events'

hidio_tick is in hidio.o, which has compiled successfully.
hidio_get_events is in hidio_windows.o, which also exists; but the linker is linking three .o files, and hidio_windows.o is the last one. Perhaps switching hidio.o and hidio_windows.o in that gcc command will let the linker find the symbols before they are needed.

Martin



On Fri, Jan 31, 2020 at 5:29 PM ffdd cchh <[email protected] <mailto:[email protected]>> wrote:

    Hi Christof,

    Thanks! Yes, I found these threads on the list:

    https://lists.puredata.info/pipermail/pd-list/2019-11/126348.html
    https://lists.puredata.info/pipermail/pd-list/2019-10/126096.html

    But, there are still no Windows version of this external...

    Github issue is up: https://github.com/Benitoite/hidio/issues/2

    Hope something comes out of this thread! I am sure there are
    enough Windows users out there in need of some hid external.

    Best,

    f


    On Fri, Jan 31, 2020 at 4:57 PM Christof Ressi
    <[email protected] <mailto:[email protected]>> wrote:

        I remember a similar thread on the list a few months ago. I
        tried to compile it and gave up. The build system for Windows
        seems to be broken and needs to be fixed (and probably
        switched from automake to pd-lib-builder). Unfortunately, I
        don't have time right now to work on this, but you could file
        a bug report on the GitHub repo, so maybe the maintainer will
        do it.

        Christof

        On 31.01.2020 21:05, ffdd cchh wrote:
        Dear list,

        I need to use external controllers via USB with vanilla (say,
        a PS4 controller), and I have not found a compiled version of
        [hidio] for Windows. Please, let me know if there are
        ready-made options out there (feel free to change subject
        line if that thread goes wild).

        In the meantime, I am trying to compile [hidio] for Windows.
        I'm on Windows 10.0.18362, x64-based PC. I am using a MSYS
        terminal with MINGw64. I took the latest code from
        Benitoite's repository (https://github.com/Benitoite/hidio)
        and I am stuck with "undefined reference"s all over. I attach
        here the console log.

        I would very much welcome any idea on how to approach this so
        I can use vanilla with my students :)

        Best,

        f


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