help

Displays all supported compiler options or supported compiler options within a specified category of options.

Syntax

Linux:

-help[category]

macOS:

-help[category]

Windows:

/help[category]

Arguments

category

Is a category or class of options to display. Possible values are:

advanced	Displays advanced optimization options that allow fine tuning of compilation or allow control over advanced features of the compiler.
codegen	Displays Code Generation options.
compatibility	Displays options affecting language compatibility.
component	Displays options for component control.
data	Displays options related to interpretation of data in programs or the storage of data.
deprecated	Displays options that have been deprecated.
diagnostics	Displays options that affect diagnostic messages displayed by the compiler.
float	Displays options that affect floating-point operations.
help	Displays all the available help categories.
inline	Displays options that affect inlining.
ipo	Displays Interprocedural Optimization (IPO) options
language	Displays options affecting the behavior of the compiler language features.
link	Displays linking or linker options.
misc	Displays miscellaneous options that do not fit within other categories.
openmp	Displays OpenMP and parallel processing options.
opt	Displays options that help you optimize code.
output	Displays options that provide control over compiler output.
pgo	Displays Profile Guided Optimization (PGO) options.
preproc	Displays options that affect preprocessing operations.
reports	Displays options for optimization reports.

Default

OFF	No list is displayed unless this compiler option is specified.

Description

This option displays all supported compiler options or supported compiler options within a specified category of options. If you specify category, it will display all available (supported) compiler options in the specified category.

On Linux* systems, this option can also be specified as --help.

IDE Equivalent

None

Alternate Options

Linux and macOS*: None

Windows: /?