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cmake: only enable supported compiler warning flags - #4148
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We currently unconditionally enable the "-Wall" and "-Wextra" flags. Some platforms rely on compilers which do not support these flags, though. One of these platforms is Haiku, which does not support "-Wextra" due to being stuck on GCC version 2. Fix builds on such platforms by adding these flags only if supported by the compiler.
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We currently unconditionally enable the "-Wall" and "-Wextra" flags.
Some platforms rely on compilers which do not support these flags,
though. One of these platforms is Haiku, which does not support
"-Wextra" due to being stuck on GCC version 2.
Fix builds on such platforms by adding these flags only if supported by
the compiler.
This supersedes #4140