fails to build with error: /var/tmp/portage/dev-libs/libusb-1.0.25/work/libusb-1.0.25/libusb/os/linux_usbfs.c: In function 'op_get_configuration': /var/tmp/portage/dev-libs/libusb-1.0.25/work/libusb-1.0.25/libusb/os/linux_usbfs.c:1452:19: error: 'active_config' may be used uninitialized in this function [-Werror=maybe-uninitialized] 1452 | *config = (uint8_t)active_config; | ^~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors Reproducible: Always
Created attachment 764365 [details] build.log
Build works fine with ABI_X86="64" Fails with ABI_X86="32 64"
Please * paste the emerge info as described on https://wiki.gentoo.org/wiki/Attach_the_logs_to_the_bug_ticket
After further investigation, it turns out that changing CFLAGS -O3 to -O2 "fixes" it. Please close this bug if this is an unsupported configuration.
Please report the issue upstream. https://github.com/libusb/libusb/issues
*** Bug 832998 has been marked as a duplicate of this bug. ***
Upstream PR at https://github.com/libusb/libusb/pull/1062 fixes the issue for me. Maybe we should include this trivial patch in dev-libs/libusb ebuild to prevent user's @world updates from failing?
(In reply to Maciej S. Szmigiero from comment #7) > Upstream PR at https://github.com/libusb/libusb/pull/1062 fixes the issue > for me. > > Maybe we should include this trivial patch in dev-libs/libusb ebuild to > prevent user's @world updates from failing? Nobody is making folks use -O3 but yes, sure, I was just waiting for it to be merged, but it is indeed simple. I'll add it in a bit.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=057e21919e19feb2fd4d51e2bf18d3c0b4512a61 commit 057e21919e19feb2fd4d51e2bf18d3c0b4512a61 Author: Sam James <sam@gentoo.org> AuthorDate: 2022-02-20 22:14:46 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2022-02-20 23:08:37 +0000 dev-libs/libusb: fix build failure with -O3 Upstream patch (not yet merged, but simple enough) which works around a build failure (false positive) with -O3. Closes: https://bugs.gentoo.org/832732 Signed-off-by: Sam James <sam@gentoo.org> .../files/libusb-1.0.25-fix-O3-warning.patch | 32 ++++++++++++++++++++++ dev-libs/libusb/libusb-1.0.25.ebuild | 4 +++ 2 files changed, 36 insertions(+)
