diff options
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 32b9c48..07a21fd 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -257,7 +257,8 @@ in the following sections. -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-deprecated-enum-enum-conversion -Wno-deprecated-enum-float-conversion -Weffc++ -Wno-elaborated-enum-base --Wno-exceptions -Wextra-semi -Wno-global-module -Wno-inaccessible-base +-Wno-exceptions -Wno-expose-global-module-tu-local -Wno-external-tu-local +-Wextra-semi -Wno-global-module -Wno-inaccessible-base -Wno-inherited-variadic-ctor -Wno-init-list-lifetime -Winvalid-constexpr -Winvalid-imported-macros -Wno-invalid-offsetof -Wno-literal-suffix @@ -272,7 +273,7 @@ in the following sections. -Woverloaded-virtual -Wno-pmf-conversions -Wself-move -Wsign-promo -Wsized-deallocation -Wsuggest-final-methods -Wsuggest-final-types -Wsuggest-override -Wno-template-body --Wno-template-id-cdtor -Wtemplate-names-tu-local -Wno-external-tu-local +-Wno-template-id-cdtor -Wtemplate-names-tu-local -Wno-terminate -Wno-vexing-parse -Wvirtual-inheritance -Wno-virtual-move-assign -Wvolatile} @@ -4759,6 +4760,29 @@ The presence of an explicit instantiation silences the warning. This flag is enabled by @option{-Wextra}. +@opindex Wexpose-global-module-tu-local +@opindex Wno-expose-global-module-tu-local +@item -Wno-expose-global-module-tu-local +An exposure of a translation-unit-local entity from a module interface is +invalid, as this may cause ODR violations and manifest in link errors or other +unexpected behaviour. However, many existing libraries declare TU-local +entities in their interface, and avoiding exposures of these entities may be +difficult in some cases. + +As an extension, GCC allows exposures of internal variables and functions that +were declared in the global module fragment. This warning indicates when such +an invalid exposure has occurred, and can be silenced using diagnostic pragmas +either at the site of the exposure, or at the point of declaration of the +internal declaration. + +When combined with @option{-Wtemplate-names-tu-local}, GCC will also warn about +non-exposure references to TU-local entities in template bodies. Such templates +can still be instantiated in other TUs but the above risks regarding exposures +of translation-unit-local entities apply. + +This warning is enabled by default, and is upgraded to an error by +@option{-pedantic-errors}. + @opindex Wexternal-tu-local @opindex Wno-external-tu-local @item -Wno-external-tu-local @@ -28520,6 +28544,8 @@ be within 2GB addressing space. @item medium The text segment and data segment must be within 2GB addressing space. +This is the default code model unless GCC has been configured with +@option{--with-cmodel=} specifying a different default code model. @item large (Not implemented yet) @@ -28528,7 +28554,6 @@ This mode does not limit the size of the code segment and data segment. The @option{-mcmodel=extreme} option is incompatible with @option{-fplt} and/or @option{-mexplicit-relocs=none}. @end table -The default code model is @code{normal}. @item -mexplicit-relocs=@var{style} Set when to use assembler relocation operators when dealing with symbolic |