[Mesa-dev] [Bug 109131] cc1plus: error: unrecognized command line option "-std=c++11"

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109131

            Bug ID: 109131
           Summary: cc1plus: error: unrecognized command line option
                    "-std=c++11"
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Mesa core
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: vlee at freedesktop.org
        QA Contact: mesa-dev at lists.freedesktop.org
                CC: baker.dylan.c at gmail.com, emil.l.velikov at gmail.com

CXX    gallivm/lp_bld_debug.lo
cc1plus: error: unrecognized command line option "-std=c++11"

commit 12187550f9c248e72ed8848e96da8f29f1e3a713
Author: Emil Velikov <emil.velikov at collabora.com>
Date:   Thu Dec 13 11:56:40 2018 +0000

    configure: add CXX11_CXXFLAGS to LLVM_CXXFLAGS

    Seemingly with LLVM7 and GCC 5.0, the former won't properly advertise
    -std=c++11 and the latter will choke.

    dd this temporary workaround, otherwise we'll get errors like:

    In file included from /usr/include/c++/5/type_traits:35:0,
                     from
/usr/lib/llvm-7/include/llvm/Support/type_traits.h:18,
                     from /usr/lib/llvm-7/include/llvm/ADT/Optional.h:22,
                     from /usr/lib/llvm-7/include/llvm/ADT/STLExtras.h:20,
                     from /usr/lib/llvm-7/include/llvm/ADT/StringRef.h:13,
                     from
/usr/lib/llvm-7/include/llvm/Target/TargetMachine.h:17,
                     from ../../../src/amd/common/ac_llvm_helper.cpp:36:
    /usr/include/c++/5/bits/c++0x_warning.h:32:2: error: #error This file
requires compiler and library support for the ISO C++ 2011 standard. This
support must be enabled with the -std=c++11 or -std=gnu++11 compiler options.

    Signed-off-by: Emil Velikov <emil.velikov at collabora.com>
    Reviewed-by: Dylan Baker <dylan at pnwbakers.com>

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