/ curl Public
CMake: fix test for warning suppressions #5714
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GCC doesn't warn for unknown
-Wno-options, except if there are other
warnings or errors . This was problematic with
warning-as-error cannot be suppressed. Notably, this always happened
-Wno-pedantic-ms-formatwhen not targeting Windows. So test for
the positive form of the warning instead, which should always result in
a diagnostic if unknown.