[llvm-bugs] [Bug 49880] New: OpenMP version printed for OMP_DISPLAY_ENV=1

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49880

            Bug ID: 49880
           Summary: OpenMP version printed for OMP_DISPLAY_ENV=1
           Product: OpenMP
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Runtime Library
          Assignee: unassignedbugs at nondot.org
          Reporter: protze at itc.rwth-aachen.de
                CC: llvm-bugs at lists.llvm.org

Currently, the runtime prints _OPENMP='201611', when exporting
OMP_DISPLAY_ENV=1.
This is other than the value of _OPENMP=201811 during compilation.
Furthermore, 201611 is not a value defined in any spec. 

As LC members would argue, an OpenMP implementation should always be seen as a
fixed combination of compiler and runtime. Such implementation should report a
consistent version (at least for the default usage).

Cases, where mileage might vary:
- flag -fopenmp-version=xy is passed to compiler -> compile-time value of
_OPENMP changes
- different compiler than clang is used while linking against libomp
- clang-compiled application/library is linked against a different OpenMP
runtime.

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