This chapter contains brief descriptions of all options that may be specified in either configuration file. or project file.
The general option syntax is:
Option = "-" name ("+" | "-" | "=" (string | integer))
Option names are case insensitive. Case is preserved when string option values are stored or emitted, but is ignored when they are compared.
-mergeall+ -GENWIDTH=78 -BackEnd=Common
This group of options sets file name extensions and prefixes for H2D input and output files.
|Option||Sets extension for...||Default|
|TREEEXT||include tree files (see the GENTREE option)||tre|
|Option||Sets prefix for...||Default|
|MACPFX||macro prototype modules||_|
For each option, a set of possible values is given in parenthesis:
|string||an arbitrary sequence of characters|
|numeric||an unsigned integer number|
|boolean||ON or OFF|
Enables generation of definition modules suitable for either native-code compiler, translator to C, or both. It also affects generation of additional modules (See Fitting a Modula-2 compiler).
Default: Common - both native and translator.
If this option is set OFF, H2D does not translate a header file if a definition module corresponding to it already exists. Otherwise, H2D produces a new definition module which may overwrite the old one.
See also Redirection file.
Default: OFF - do not process already translated headers
Sets starting position of comments preserved by H2D in output files. Has effect only on comments which are placed next to declarations.
Default: delimit comments with a single blank.
If this option is set ON, H2D recognizes C++-style comments (started with '//') in header files.
Default: ON - recognize C++ comments.
Sets value of the CSTDLIB XDS option in output definition modules corresponding to top-level header files (listed on the command line or in a project file). See Convertor to C for more information.
Default: OFF - set CSTDLIB off in definition modules.
If this option is set ON, a file containing non-standard preprocessor directives is produced for each header file.
Deafult: OFF - do not extract non-standard directives
Defines whether C enumerations should be unconditionally translated to integer constants (Const) or Modula-2 enumeration types (Enum). If set to Mixed, only enumerations with default (or explicitly specified, but matching default) constant values are translated to enumeration types; all other are translated to constants. See also Enumeration.
Default: Const - always translate to constants
This option controls translation of the #include directive in cases when a specified file name contains directories. If this option is set OFF, H2D strips directory names. Otherwise directory names are kept and separators are replaced with underscore characters:
#include <sys\errno.h> IMPORT sys_errno;
See also !name.
Default: OFF - strip directory names
Setting this option ON forces H2D to produce prototype modules for function-like C macros encountered in header files (prototype means that implementation modules contain procedures with empty bodies; the actual code has to be written by hand). These modules have not to be imported, but to be added to the link list. See also Native code.
This option is ignored if the target is XDS-C (the BACKEND option is set to C).
Default: OFF - do not generate macro modules.
Being set ON, enables translation of #defined constants to read-only variables. Have no effect in native back-end sections. See Preserving constant names for more information.
Default: OFF - do not translate constants to variables.
Setting this option ON forces H2D to insert a comment containing name of a merged header before declarations from that header.
Default: OFF - do not insert separators
If this option is set ON, H2D produces a text file containing a tree of #include directives for each header file specified on the command line or in a project file using the !module directive. A name of a tree file is a name of a corresponding header file with extension defined by the TREEEXT option.
Default: OFF - do not produce tree files
Sets maximum length of a string in the output file.
Default: do not limit string length.
If this option is set ON, H2D merges all header files included into the translated header by means of the #include directive. If this option is set OFF, H2D generates separate definition module for each header which is not specified in the #merge directive.
See also File inclusion and Headers merging.
Default: OFF - do not merge headers which are not specified in the #merge directive.
Setting this option ON enables progress indicator.
Default: OFF - show no progress indicator
The base types definition and mapping options, CTYPE and M2TYPE, have a special syntax. Either of them may be specified more than once in a project or configuration file, provided that each time a new type is defined. See Base types mapping for more information on usage of these directives.
By default, H2D is configured to support XDS compilers.
This option defines size and default mapping of a C base type.
CTypeOption = '-' 'CTYPE' '=' Type '=' size ',' qualident Type = 'signed char' | 'unsigned char' | 'short int' | 'unsigned short int' | 'signed int' | 'unsigned int' | 'signed long int' | 'unsigned long int' | 'float' | 'double' | 'long float' | 'long double'
size is the size of Type in bytes, and qualident is a Modula-2 type to which Type should be translated by default:
-CTYPE = signed char = 1, CHAR
See Base types mapping for more information.
This option defines a Modula-2 type.
M2TypeOption = '-' 'M2TYPE' '=' qualident '=' size ',' Attr Attr = 'BOOL' | 'CHAR' | 'REAL' | 'SET' | 'SIGNED' | 'UNSIGNED'
qualident is a Modula-2 type being defined, size is its size in bytes, and Attr is a family to which it belongs:
-M2TYPE = SYSTEM.INT16 = 2, SIGNED
See Base types mapping for more information.