Pch_verbose

(Project Properties window)

*.prj\COMPILE\Preprocessor\
Precompiled Headers\Pch_verbose

If pch is enabled, setting pch_verbose to enabled ensures that for each precompiled header file that cannot be used for the current compilation, a message is displayed stating the reason why it can not.

Set to disabled by default.

See –-pch_verbose in the documentation for your toolchain.