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Home/ Questions/Q 646957
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Editorial Team
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Editorial Team
Asked: May 13, 20262026-05-13T21:40:12+00:00 2026-05-13T21:40:12+00:00

LLVM 2.6 + clang. Trying to compile C++ file and got: clang: warning: not

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LLVM 2.6 + clang.

Trying to compile C++ file and got:

clang: warning: not using the clang compiler for C++ inputs

How can I start clang in C++ mode?

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  1. Editorial Team
    Editorial Team
    2026-05-13T21:40:13+00:00Added an answer on May 13, 2026 at 9:40 pm

    I would get the trunk code. C++ support has been much improved since 2.6.

    The clang driver Makefile in tools/clang/tools/driver uses the CLANG_IS_PRODUCTION define to control whether C++ is on or off. CLANG_IS_PRODUCTION means C++ off. The default for a trunk build is no CLANG_IS_PRODUCTION (i.e. a development build).

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