treat specific warning as error Xcode

Question

In the Build Settings is it possible to treat Specific warnings as Error instead of Treating all warnings are Errors.

This is a simple Switch statement checker in xcode :

GCC_WARN_CHECK_SWITCH_STATEMENTS = YES_Error 

instead of :

GCC_WARN_CHECK_SWITCH_STATEMENTS = YES 

But its not working for me.

Answer 1

Treat specific warnings as errors

use -Werror=

for example: -Werror=unused-variable will treat unused variable as error, which originally treat as warning by -Wunused-variable flag

add these to Other Warning Flags in project setting.

Treat all warnings as errors except for some warnings

use -Werror and -Wno-error=

The first one will treat all warnings as errors, equals to the setting in Xcode.

And use -Wno-error= to make specific warning not be error. For example: -Wno-error=unused-variable

add these to Other Warning Flags in project setting.

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Reference https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html

For all warning flags https://clang.llvm.org/docs/DiagnosticsReference.html