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The manuals for GCC as a whole, and the C and C++ front ends, are in files doc/*.texi. Other front ends have their own manuals in files language/*.texi. Common files doc/include/*.texi are provided which may be included in multiple manuals; the following files are in doc/include:

The GNU Free Documentation License.
The section “Funding Free Software”.
Common definitions for manuals.
The GNU General Public License.
A copy of texinfo.tex known to work with the GCC manuals.

DVI-formatted manuals are generated by `make dvi', which uses texi2dvi (via the Makefile macro $(TEXI2DVI)). PDF-formatted manuals are generated by `make pdf', which uses texi2pdf (via the Makefile macro $(TEXI2PDF)). HTML formatted manuals are generated by make html. Info manuals are generated by `make info' (which is run as part of a bootstrap); this generates the manuals in the source directory, using makeinfo via the Makefile macro $(MAKEINFO), and they are included in release distributions.

Manuals are also provided on the GCC web site, in both HTML and PostScript forms. This is done via the script maintainer-scripts/update_web_docs. Each manual to be provided online must be listed in the definition of MANUALS in that file; a file name.texi must only appear once in the source tree, and the output manual must have the same name as the source file. (However, other Texinfo files, included in manuals but not themselves the root files of manuals, may have names that appear more than once in the source tree.) The manual file name.texi should only include other files in its own directory or in doc/include. HTML manuals will be generated by `makeinfo --html', PostScript manuals by texi2dvi and dvips, and PDF manuals by texi2pdf. All Texinfo files that are parts of manuals must be checked into SVN, even if they are generated files, for the generation of online manuals to work.

The installation manual, doc/install.texi, is also provided on the GCC web site. The HTML version is generated by the script doc/install.texi2html.