fglcomp

Syntax

fglcomp [options] srcfile[.4gl]

options are described in Table 1.
srcfile .4gl is the program source file.
The .4gl extension is optional.

Options

Table 1. fglcomp options
Option	Description
`-V` or `--version`	Display version information for the tool.
`-h` or `--help`	Display options for the tool. Short help.
`-i { mbcs }`	Display information. `-i mbcs` displays information about multibyte character set settings.
`-S`	Dump Static SQL statements found in the source to stdout.
`-m`	Extract %"string" localized strings from source to stdout.
`-M`	Write error messages to standard output instead of creating a .err error file.
`-W what`	Display warning messages. For a complete description, see Arguments for the -W option.
`-E`	Preprocess only. See The preprocessor for more details.
`--timestamp`	Add compilation timestamp to build information in 42m header.
`-p option`	Preprocessing control, where option can be one of: `nopp`: Disable preprocessing. `noli`: No line number information (only with -E option). `fglpp`: Use # syntax instead of & syntax.
`-G`	Produce .c and .h globals interface files for C Extensions.
`-I path`	Provides a path to search for include files. See The preprocessor for more details.
`-D ident`	Defines the macro 'ident' with the value 1. See The preprocessor for more details.
`--build-doc`	Generate source documentation.
`--build-rdd`	Generate the .rdd data definition during compilation.
`--verbose`	Print detailed compilation information.
`--implicit=type`	Specify whether or not to compile imported modules, where type can be one of: `none`: Disable any implicit compilation. `42m`: Compileimported modules if needed (the default).
`-r` or `--resolve-calls`	Throw an error on references to undeclared functions. Each external function must be made known to the compiler by `IMPORT FGL`. When using this option, the linking phase is no longer needed; a source (4gl ) file compiled with this option must not be linked. See IMPORT FGL module. The compilation will fail if it detects circular dependencies.
`--java-option=option`	Passes Java™ runtime options when initializing the JNI interface. See Java Interface for more details.

Usage

The fglcomp tool compiles a .4gl into a .42m p-code module:

fglcomp customers.4gl

If a compilation error occurs, the compiler generates an error file with an .err extension. The error file contains the original source code with error messages. Use the option -M to display the error messages to standard error instead of producing the .err file.

Arguments for the -W option

The -W option can be used to check for wrong language usage, that must be supported for backward compatibility. When used, this option helps to write better source code.

The argument following -W option can be one of return, unused, stdsql, print, error or all.

Using -W all enables all warning flags.
Using -W error makes the compiler stop if any warning is raised, as if an error occurred.
The -W unused option displays a message for all unused variables.
The -W return option displays a warning if the same function returns different number of values with several RETURN statements.
The -W stdsql option displays a message for all non-portable SQL statements or language instructions.
The -W print option displays a message when the PRINT instruction is used outside a REPORT.
The -W implicit option warns on references to undeclared functions. A function is undeclared if not defined in the current module or in any imported module. This warning is silently ignored if IMPORT FGL is not used.
The -W apidoc option prints a warning for invalid source documentation tags when using the --build-doc option.

The -W option also supports the negative form of arguments by using the no- prefix as in: no-return, no-unused, no-stdsql. You might need to use these negative form in order to disable some warning when using the -W all option:

fglcomp -Wall -Wno-stdsql customers.4gl

Switches will be enabled/disabled in the order of appearance in the command line.