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Date:      Tue, 04 Apr 2017 11:18:32 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-bugs@FreeBSD.org
Subject:   [Bug 218349] kernel built with XCC=clang36,37,38,39,40,-devel has broken iwi device
Message-ID:  <bug-218349-8@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D218349

            Bug ID: 218349
           Summary: kernel built with XCC=3Dclang36,37,38,39,40,-devel has
                    broken iwi device
           Product: Base System
           Version: 10.3-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: kennethsalerno@yahoo.com

It seems that unless you build world+kernel with the version of llvm/clang =
in
base (3.4) you'll wind up with broken WiFi. Just curious how I could go abo=
ut
troubleshooting why, since everything else seems to be working.

Symptom is you can't even successfully execute "ifconfig wlan0 scan", just
returns nothing. Pretty sure it's the iwi device itself, but could be wrong.

Steps to reproduce:
XCC=3D/usr/local/bin/clang39
XCXX=3D/usr/local/bin/clang++39
XCPP=3D/usr/local/bin/clang-cpp39
export XCC XCXX XCPP
make -C /usr/src -j4 buildworld && make -C /usr/src -j4 buildkernel

Just would be nice to build the system with a newer LLVM/Clang version.

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