gnatchop recognizes the following switches:
gnatchopto operate in compilation mode, in which configuration pragmas are handled according to strict RM rules. See previous section for a full description of this mode.
gnatwhich is used to parse the given file. Not all
xxxoptions make sense, but for example, the use of -gnati2 allows
gnatchopto process a source file that uses Latin-2 coding for identifiers.
gnatchopto generate a brief help summary to the standard output file showing usage information.
mmof characters. This is useful if the resulting set of files is required to be interoperable with systems which limit the length of file names. No space is allowed between the -k and the numeric value. The numeric value may be omitted in which case a default of -k8, suitable for use with DOS-like file systems, is used. If no -k switch is present then there is no limit on the length of file names.
gnatchopis used as part of a standard build process.
Source_Referencepragmas. Use this switch if the output files are regarded as temporary and development is to be done in terms of the original unchopped file. This switch causes
Source_Referencepragmas to be inserted into each of the generated files to refers back to the original file name and line number. The result is that all error messages refer back to the original unchopped file. In addition, the debugging information placed into the object file (when the -g switch of gcc or gnatmake is specified) also refers back to this original file so that tools like profilers and debuggers will give information in terms of the original unchopped file.
If the original file to be chopped itself contains
pragma referencing a third file, then gnatchop respects
this pragma, and the generated
in the chopped file refer to the original file, with appropriate
line numbers. This is particularly useful when
is used in conjunction with
gnatprep to compile files that
contain preprocessing statements and multiple units.
gnatchopto operate in verbose mode. The version number and copyright notice are output, as well as exact copies of the gnat1 commands spawned to obtain the chop control information.
gnatchopregards it as a fatal error if there is already a file with the same name as a file it would otherwise output, in other words if the files to be chopped contain duplicated units. This switch bypasses this check, and causes all but the last instance of such duplicated units to be skipped.