The command lines for
$ gnatxref [switches] sourcefile1 [sourcefile2 ...]
These file names are considered to be regular expressions, so for instance specifying 'source*.adb' is the same as giving every file in the current directory whose name starts with 'source' and whose extension is 'adb'.
The switches can be :
gnatxrefwill parse the read-only files found in the library search path. Otherwise, these files will be ignored. This option can be used to protect Gnat sources or your own libraries from being parsed, thus making
gnatxrefmuch faster, and their output much smaller.
gnatmakeflag (see Switches for gnatmake).
gnatxrefwill output the parent type reference for each matching derived types.
gnatfindwill try to locate a project file in the current directory.
If a project file is either specified or found by the tools, then the content
of the source directory and object directory lines are added as if they
had been specified respectively by `-aI'
gnatxrefwill then display every unused entity and 'with'ed package.
gnatxrefwill generate a tags file that can be used by vi. For examples how to use this feature, see See Examples of gnatxref Usage. The tags file is output to the standard output, thus you will have to redirect it to a file.
All these switches may be in any order on the command line, and may even appear after the file names. They need not be separated by spaces, thus you can say `gnatxref -ag' instead of `gnatxref -a -g'.