3.31 Message output during Precompiled Header (PCH) processing

Whenever the compiler creates or uses a PCH file, it displays a message. You can suppress these messages or make them more verbose.

When the compiler creates or uses a PCH file, it displays the following kind of message:
test.c: creating precompiled header file test.pch
You can suppress this message with the compiler command-line option --no_pch_messages.
The --pch_verbose option enables verbose mode. In verbose mode, the compiler displays a message for each PCH file that it considers but does not use, giving the reason why it cannot be used.
Related concepts
3.22 Precompiled Header (PCH) files
3.23 Automatic Precompiled Header (PCH) file processing
3.24 Precompiled Header (PCH) file processing and the header stop point
3.25 Precompiled Header (PCH) file creation requirements
3.26 Compilation with multiple Precompiled Header (PCH) files
3.27 Obsolete Precompiled Header (PCH) files
3.28 Manually specifying the filename and location of a Precompiled Header (PCH) file
3.29 Selectively applying Precompiled Header (PCH) file processing
3.30 Suppressing Precompiled Header (PCH) file processing
3.32 Performance issues with Precompiled Header (PCH) files
Related reference
7.122 --pch_messages, --no_pch_messages
7.123 --pch_verbose, --no_pch_verbose
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