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I found this in MAN:
-std=language
Specify the language standard to compile for.
-ansi
Same as -std=c89.
But where to find the list of all supported standards by my installed compiler?
clang -std=??? test.c
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You can use Clang in C++17 mode with the -std=c++17 option (use -std=c++1z in Clang 4 and earlier).
Clang is a compiler front end for the C, C++, Objective-C, and Objective-C++ programming languages, as well as the OpenMP, OpenCL, RenderScript, CUDA, and HIP frameworks. It acts as a drop-in replacement for the GNU Compiler Collection (GCC), supporting most of its compilation flags and unofficial language extensions.
Clang is much faster and uses far less memory than GCC. Clang aims to provide extremely clear and concise diagnostics (error and warning messages), and includes support for expressive diagnostics. GCC's warnings are sometimes acceptable, but are often confusing and it does not support expressive diagnostics.
However, Clang supports such variable length arrays for compatibility with GNU C and C99 programs. If you would prefer not to use this extension, you can disable it with -Werror=vla.
Just specify any BS standard and clang will print those acceptable like so:
c:\LLVM\bin>clang++.exe -std=blabla main.cpp
error: invalid value 'blabla' in '-std=blabla'
note: use 'c++98' or 'c++03' for 'ISO C++ 1998 with amendments' standard
note: use 'gnu++98' or 'gnu++03' for 'ISO C++ 1998 with amendments and GNU extensions' standard
note: use 'c++11' for 'ISO C++ 2011 with amendments' standard
note: use 'gnu++11' for 'ISO C++ 2011 with amendments and GNU extensions' standard
note: use 'c++14' for 'ISO C++ 2014 with amendments' standard
note: use 'gnu++14' for 'ISO C++ 2014 with amendments and GNU extensions' standard
note: use 'c++17' for 'ISO C++ 2017 with amendments' standard
note: use 'gnu++17' for 'ISO C++ 2017 with amendments and GNU extensions' standard
note: use 'c++2a' for 'Working draft for ISO C++ 2020' standard
note: use 'gnu++2a' for 'Working draft for ISO C++ 2020 with GNU extensions' standard
;-)
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