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- This directory contains source code for the GNU Project's C
- preprocessor.
-
- Unlike this preprocessor, the compilers bundled with some systems have
- arbitrary limits on the number of significant characters in
- identifiers which make them unable to compile GNU Emacs. The Emacs
- build process tries to detect when it is running on such a system; if
- it is, it builds this C preprocessor, and then uses it to edit the
- Emacs source code into a form that the system's compiler can handle.
-