GNU Compiler Collection (GCC) Internals: Configuration

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#### 6.3.2 Configuration in the `gcc` Directory

The `gcc` directory is configured with an Autoconf-generated script `configure`. The `configure` script is generated from `configure.ac` and `aclocal.m4`. From the files `configure.ac` and `acconfig.h`, Autoheader generates the file `config.in`. The file `cstamp-h.in` is used as a timestamp.