C++ Debug Type File (*.#nn)

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If the External type files option in Project > Options > C++ Compiler > Precompiled headers is enabled (default), when you build a C++ project for 32-bit Windows or macOS, RAD Studio generates one or more debug type files.

Debug type files are files that contain debug type information for all the symbols contained in the precompiled header file. These files end with the .#xx extension, where xx is 00 for the first file generated and it is incremented for each additional type-information file required.

Using debug type files dramatically decreases the size of your object files, since debug type information is centralized and is not duplicated in each object file.

These files are generated by default as <project>.#<nn> into C:\Users\<user>\Documents\Embarcadero\Studio\Projects\<project>\<platform>\<build configuration>.

The file name of the <name>.#nn files is based on the file name of the precompiled header file — RAD Studio replaces the pch file extension with #nn.

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