lib-usb related linking error with msys2 build

lib-usb related linking error with msys2 build

[Howard Spoelstra]

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Hi all,

I get the following error compiling qemu-system-ppc from current master
with msys2 (fully updated)

./configure --cross-prefix=x86_64-w64-mingw32- --target-list=ppc-softmmu
--enable-gtk --enable-sdl

C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/10.1.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
../hw/usb/host-libusb.o: in function `usb_host_open':
C:\msys64\home\hsp\src\qemu-master/hw/usb/host-libusb.c:913: undefined
reference to `libusb_wrap_sys_device'
collect2.exe: error: ld returned 1 exit status
make[1]: *** [Makefile:208: qemu-system-ppcw.exe] Error 1
make: *** [Makefile:527: ppc-softmmu/all] Error 2

I tracked it down to commit:

$ git bisect bad
9f815e83e983d247a3cd67579d2d9c1765adc644 is the first bad commit
commit 9f815e83e983d247a3cd67579d2d9c1765adc644
Author: Gerd Hoffmann <kraxel@redhat.com>
Date:   Fri Jun 5 14:59:52 2020 +0200

    usb: add hostdevice property to usb-host

    The new property allows to specify usb host device name.  Uses standard
    qemu_open(), so both file system path (/dev/bus/usb/$bus/$dev on linux)
    and file descriptor passing can be used.

    Requires libusb 1.0.23 or newer.  The hostdevice property is only
    present in case qemu is compiled against a new enough library version,
    so the presence of the property can be used for feature detection.

    Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
    Message-Id: <20200605125952.13113-1-kraxel@redhat.com>

 hw/usb/host-libusb.c | 75
++++++++++++++++++++++++++++++++++++++++++----------
 hw/usb/trace-events  |  1 +
 2 files changed, 62 insertions(+), 14 deletions(-)

According to msys2, the following libusb is provided:
Group(s):Repo(s)mingw32, mingw64 Version: 1.0.23-1Upstream URL:
https://libusb.info/Arch Linux:1.0.23 GIT Version:1.0.23-1 License(s)LGPLBinary
Packages:mingw-w64-i686-libusbmingw-w64-x86_64-libusb
Thanks for looking into this.

Best,
Howard

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