--pch_messages
--no_pch_messages
This option enables or disables the display of messages indicating that a PCH file is used in the current compilation.
The default is --pch_messages.
‑‑create_pch=filename
‑‑pch
‑‑pch_dir=dir
‑‑pch_verbose, --no_pch_verbose
‑‑use_pch=filename
#pragma hdrstop
#pragma no_pch
Precompiled header files in the Compiler User Guide.