Whenever you add
GTY markers to a source file that previously
had none, or create a new source file containing
there are three things you need to do:
target_gtfilesin the appropriate port’s entries in config.gcc.
GTFILESvariable in Makefile.in.
gtfilesvariable defined in the appropriate config-lang.in. Headers should appear before non-headers in this list.
gtfilesvariable of all the front ends that use it.
For source files that aren’t header files, the machinery will generate a header file that should be included in the source file you just changed. The file will be called gt-path.h where path is the pathname relative to the gcc directory with slashes replaced by -, so for example the header file to be included in cp/parser.c is called gt-cp-parser.h. The generated header file should be included after everything else in the source file.
For language frontends, there is another file that needs to be included somewhere. It will be called gtype-lang.h, where lang is the name of the subdirectory the language is contained in.
Plugins can add additional root tables. Run the
utility in plugin mode as
gengtype -P pluginout.h source-dir
file-list plugin*.c with your plugin files
GTY to generate the pluginout.h file.
The GCC build tree is needed to be present in that mode.