On 06/25/18 15:39, Thomas Garnier wrote: > Provide an option to default visibility to hidden except for key > symbols. This option is disabled by default and will be used by x86_64 > PIE support to remove errors between compilation units. > > The default visibility is also enabled for external symbols that are > compared as they maybe equals (start/end of sections). In this case, > older versions of GCC will remove the comparison if the symbols are > hidden. This issue exists at least on gcc 4.9 and before. > > Signed-off-by: Thomas Garnier <[email protected]> > ---
> diff --git a/init/Kconfig b/init/Kconfig > index 24b60536e26b..d4f90cc38ede 100644 > --- a/init/Kconfig > +++ b/init/Kconfig > @@ -1718,6 +1718,13 @@ config PROFILING > config TRACEPOINTS > bool > > +# > +# Default to hidden visibility for all symbols. > +# Useful for Position Independent Code to reduce global references. > +# > +config DEFAULT_HIDDEN > + bool > + I certainly would appreciate a better/more descriptive kconfig symbol name here. > source "arch/Kconfig" > > endmenu # General setup thanks, -- ~Randy
