doc: Document module language-linkage supported

I missed we documented this as unimplemented, when I implemented it.

	gcc/
	* doc/invoke.texi (C++ Modules): Remove language-linkage
	as missing feature.
This commit is contained in:
Nathan Sidwell 2022-06-21 06:23:11 -07:00
parent ab981aab92
commit f1fcd6e3ad

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@ -34639,13 +34639,6 @@ Papers p1815 (@uref{https://wg21.link/p1815}) and p2003
exported region may reference (for instance, the entities an exported
template definition may reference). These are not fully implemented.
@item Language-linkage module attachment
Declarations with explicit language linkage (@code{extern "C"} or
@code{extern "C++"}) are attached to the global module, even when in
the purview of a named module. This is not implemented. Such
declarations will be attached to the module, if any, in which they are
declared.
@item Standard Library Header Units
The Standard Library is not provided as importable header units. If
you want to import such units, you must explicitly build them first.