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Language

C++

Compiler

clang HEAD 12.0.0 (https://github.com/llvm/llvm-project.git 4013bab9c4a5fe634be6271779a99bc158c3e396)

Options
Warnings
Boost 1.73.0
C++2a(GNU)
no pedantic
Raw compiler options
-Wzero-length-array

$ clang++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.73.0/clang-head/include -std=gnu++2a -Wzero-length-array
prog.cc:4:11: warning: zero size arrays are an extension [-Wzero-length-array]
    int a[0];  // C4200
          ^
1 warning generated.
Exit Code:
0