fvisibility
Specifies the default visibility for
global symbols or the visibility for symbols in declarations, functions, or
variables.
Syntax
Linux:
-fvisibility
=
arg
-fvisibility-global-new-delete-hidden
-fvisibility-inlines-hidden
-f[no]visibility-inlines-hidden-static-local-var
-fvisibility-ms-compat
Windows:
None
Arguments
- arg
- Specifies the visibility setting. Possible values are:
- default
- Sets visibility to default. The symbol is visible outside this shared object.This means that other components can reference the symbols, and the symbol definitions can be overridden (preempted) by a definition of the same name in another component.
- hidden
- Sets visibility to hidden. The symbol isnotvisible outside this shared object.This means that other components cannot directly reference the symbol.
- internal
- This is the same as specifying hidden.
- protected
- Sets visibility to protected. The symbol is seen by the dynamic linker but always dynamically resolves to an object within this shared object.This means that other components can reference the symbol, but it cannot be overridden by a definition of the same name in another component.This value is not supported on all targets.
Default
- -fvisibility=default
- The compiler sets visibility of symbols to default.
Description
This option specifies the default visibility for global
symbols (syntax
-fvisibility=
arg
) or the visibility for
symbols in declarations, functions, or variables.
The following table shows supported
-fvisibility
options:
Option
| Description
|
|---|---|
-fvisibility= arg | Sets visibility of symbols for all global declarations.
As specified above in Arguments,
arg can be one of the following: hidden internal
default protected.
|
-fvisibility-global-new-delete-hidden | Sets hidden visibility for global C++ operator
new and delete declarations.
|
-fvisibility-inlines-hidden | Sets hidden visibility by default for inline
C++ member functions.
|
-fvisibility-inlines-hidden-static-local-var -fno-visibility-inlines-hidden-static-local-var | When
-fvisibility-inlines-hidden is enabled, static
variables in inline C++ member functions will also be given hidden visibility
by default.
To disable option
-fvisibility-inlines-hidden-static-local-var ,
specify option
-fno-visibility-inlines-hidden-static-local-var .
|
-fvisibility-ms-compat | Sets default visibility for global types and
sets hidden visibility for global functions and variables.
|
If an -fvisibility option is specified more than once on
the command line, the last specification takes precedence over any others.
The following shows the precedence of the visibility
settings (from greatest to least visibility):
- default
- protected
- hidden
IDE Equivalent
None
Alternate Options
None