[llvm-bugs] [Bug 39629] New: libc++ benchmarks do not build with older version of the compiler.

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=39629

            Bug ID: 39629
           Summary: libc++ benchmarks do not build with older version of
                    the compiler.
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: denis.yaroshevskij at gmail.com
                CC: llvm-bugs at lists.llvm.org, mclow.lists at gmail.com

Hi!

So - libc++ in it's documentation claims to support clang3.5

Unfortunaly, when compiling the benchmarks for the library with clang3.9 - we
get a compiler error because of -std=c++17:
https://github.com/llvm-mirror/libcxx/blob/master/benchmarks/CMakeLists.txt#L71

This is important because there are performance issues that arise with previous
versions of clang and it's a good idea to run benchmarks on those too.

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