Vito Gamberini fa10dc6c22 Experimental/CXXModules: Implement EcoStd Module Metadata parser ...

Adds a parser and serializer for the EcoStd Module Metadata format

RFC: https://github.com/ecostd/rfcs/pull/3

This adapts the existing experimental support for import std; to use
the new parser. The CMAKE_CXX_STDLIB_MODULES_JSON is now the canonical
variable for controlling how CMake discovers the stdlib module metadata,
and is used directly by compiler detection.

Toolchains can still override the __CMAKE::CXX## targets if they wish,
either in conjunction with CMAKE_CXX_STDLIB_MODULE_JSON or not. It is
possible to disable automatic detection of
CMAKE_CXX_STDLIB_MODULE_JSON by setting it to the empty string.

When available, the CMAKE_CXX_STDLIB_MODULE_JSON will be used to create
all requested C++ stdlibs which do not already have targets.

2025-11-18 11:39:59 -05:00

2.2 KiB

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