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Subject: [Bug 216054] graphics/openshadinglanguage: fails to build with
 libc++ 4.0
Date: Mon, 23 Jan 2017 21:38:15 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216054

--- Comment #6 from Jan Beich (mail not working) <jbeich@FreeBSD.org> ---
(In reply to Eric Fiselier from comment #4)
> As long as you don't use anything less that Clang 3.4 you could upstream a
> patch that just always enabled `__decltype` instead of `__typeof__` and it
> should work.

We have 3 ports that depend on Clang 3.3 but unconditionally using __declty=
pe
in libc++'s __config works fine, at least with comment 1 test.

(In reply to Dimitry Andric from comment #5)
Via llvm-config34 --prefix, see src/liboslexec/CMakeLists.txt:

    # Figure out what program we will use to make the bitcode.
    if (NOT LLVM_BC_GENERATOR)
        FIND_PROGRAM(LLVM_BC_GENERATOR NAMES "clang++" PATHS
"${LLVM_DIRECTORY}/bin" NO_DEFAULT_PATH NO_CMAKE_SYSTEM_PATH
NO_SYSTEM_ENVIRONMENT_PATH NO_CMAKE_ENVIRONMENT_PATH NO_CMAKE_PATH)
    endif ()

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