C++ : Why does -Wunused-variable in GCC produce an error even on static const?

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C++ : Why does -Wunused-variable in GCC produce an error even on static const?
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C++ : Why does -Wunused-variable in GCC produce an error even on static const?
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does Why in const? GCC : produce on static -Wunused-variable even error an C++




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