Many thanks for the response, Soeren!
That branch has been merged to libusb mainline in the meanwhile, see
https://github.com/libusb/libusb/issues/252
and
https://github.com/libusb/libusb/commit/d67eb5beaa44c17c09f089a522ff483f4978a978
Hence, using a libusb checkout of this commit or later should work.
Thanks for that - great to know!
I should have mentioned, that since the `$GIT_CLONE
git://github.com/dickens/libusb -b event-abstraction-v4` will fail immediately,
I did try to first use the libusb master branch - however, that one is 6 years
old. Then, after realizing the `examples` branch of libusb is newer, instead I
used this in the cross-compile/msys2/sigrok-native-msys2:
```
$ git diff
diff --git a/cross-compile/msys2/sigrok-native-msys2
b/cross-compile/msys2/sigrok-native-msys2
index bb692db..1d25c57 100755
--- a/cross-compile/msys2/sigrok-native-msys2
+++ b/cross-compile/msys2/sigrok-native-msys2
@@ -117,7 +117,7 @@ fi
# -----------------------------------------------------------------------------
# libusb
-$GIT_CLONE git://github.com/dickens/libusb -b event-abstraction-v4
+$GIT_CLONE git://github.com/dickens/libusb -b examples # -b
event-abstraction-v4
cd libusb
./bootstrap.sh
./configure $C $L
```
And now I looked at the libusb history, and both the `examples` and `WIP`
branches contain commit d67eb5bea. So, `examples` should be OK - but the above
error, I get during a build of libsigrok with the `examples` branch of libusb!?
I've found that this is the part that causes the error, in (for my build) a
file called build_debug_64/libsigrok/configure :
```
if test -z "$NEED_USB_TRUE"; then :
case $sr_have_libusb_os_handle:$host_os in #(
no:mingw*) :
as_fn_error $? "Windows builds require the event-abstraction branch of libusb"
"$LINENO" 5 ;; #(
*) :
;;
esac
fi
```
Unfortunately, I'm really bad at reading/understanding configure scripts; but I
guess $sr_have_libusb_os_handle is what triggers the condition, and that is
derived a bit earlier:
```
ac_fn_c_check_type "$LINENO" "libusb_os_handle" "ac_cv_type_libusb_os_handle"
"#include <libusb.h>
"
if test "x$ac_cv_type_libusb_os_handle" = xyes; then :
cat >>confdefs.h <<_ACEOF
#define HAVE_LIBUSB_OS_HANDLE 1
_ACEOF
sr_have_libusb_os_handle=yes
else
sr_have_libusb_os_handle=no
fi
```
I have a really hard parsing what is happening here; but I guess, this somehow sets
sr_have_libusb_os_handle to "no" even with the libusb `examples` branch build.
So, if there are some more suggestions, I'd love to hear them - in the meantime, I'll try
to comment that part `if test -z "$NEED_USB_TRUE"; then :`, see if stuff
compiles with it ...
Cheers!
Regards,
-Soeren
On Wed, 2020-10-28 at 12:35 +0100, sdbbs wrote:
Hi all,
I was trying to build sigrok/PulseView on MINGW64 on Windows 10, via
https://sigrok.org/gitweb/?p=sigrok-util.git;a=blob;f=cross-compile/msys2/sigrok-native-msys2
... - and I got stuck at this part:
...
checking for libusb_os_handle... no
checking for zip_discard... yes
configure: error: Windows builds require the event-abstraction branch of libusb
... which is all great - except, there is no event-abstraction branch in
https://github.com/dickens/libusb/branches/all
Any suggestions on how to get over this?
Thanks in advance!
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