Compiler Option Z

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Compiler Option: -z

Sets miscellaneous or experimental compiler options.

Syntax

-z < value >

Parameters

value

Miscellaneous compiler option.

Description

The -z compiler option sets miscellaneous, obscure, temporary, or experimental options used by the developers. There is no guarantee that these options will be supported in future versions of the compiler.

-z gosub-setjmp

Specifies that the setjmp/longjmp implementation of GoSub should be used even when the GAS backend is used. By default, GoSub will be supported in -gen gas using CALL/RET assembly instructions and in -gen gcc using setjmp/longjmp C runtime functions.

-z valist-as-ptr

Specifies that the implementation of Cva_List variable argument lists and macros for variadic procedures should use a normal pointer type if the target supports it. By default, Cva_List data types are mapped to gcc's __builtin_va_list data type when using -gen gcc.

-z no-thiscall

Instructs the compiler to ignore __Thiscall directives in source files.

-z no-fastcall

Instructs the compiler to ignore __Fastcall directives in source files.

-z fbrt

Instructs the compiler to link with the libfbrt[mt].a library instead of the libfb[mt].a library rather than having to copy or move files around or have multiple development directories.

-z nocmdline

Instructs the compiler to ignore all Cmdline directives in source file and take control from the real compiler command line only.

-z retinflts

Instructs the compiler to enable returning some structures (types) in floating point registers.

-z nobuiltins

Instructs the compiler to disable all builtin declarations and definitions except those that are strictly necessary to initialize the compiler to a working state when it can begin to parse user code. The user code must then supply all of the required declarations and definitions needed by the compiler internals to allow compilation of user code to succeed. Note well that using this option requires knowledge of the internal workings of the compiler. For experimentation and development this allows declaring and defining nearly all compiler builtins in fb user code. The actual user code declarations required will depend on the contents of the user code to be compiled. The compiler is expected to throw an error if the required supporting declarations or definitions have not been made before they are required by the compiler itself while parsing the user source code (the compiler may also crash instead).

-z optabstract

Instructs the compiler not to emit unused pure abstract types.

Version

See also

• Using the Command Line

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