[LLVMbugs] [Bug 24322] New: LIBCXX_GCC_TOOLCHAIN is not used during CMake configuration builds

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=24322

            Bug ID: 24322
           Summary: LIBCXX_GCC_TOOLCHAIN is not used during CMake
                    configuration builds
           Product: libc++
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: unassignedclangbugs at nondot.org
          Reporter: eugene.zelenko at gmail.com
                CC: llvmbugs at cs.uiuc.edu, mclow.lists at gmail.com
    Classification: Unclassified

LIBCXX_GCC_TOOLCHAIN is not used during CMake configuration builds. As result
Clang uses libraries provided by operation system, which may be very old (older
then GCC 4.7).

Workaround is to specify -gcc-toolchain in CMAKE_CXX_FLAGS.

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