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Diffstat (limited to 'lld/docs/WebAssembly.rst')
| -rw-r--r-- | lld/docs/WebAssembly.rst | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/lld/docs/WebAssembly.rst b/lld/docs/WebAssembly.rst index 1b01cab5c253..b23f2cd462b4 100644 --- a/lld/docs/WebAssembly.rst +++ b/lld/docs/WebAssembly.rst @@ -112,8 +112,8 @@ The default behaviour is to generate these stub function and to produce a warning. The ``--fatal-warnings`` flag can be used to disable this behaviour and error out if mismatched are found. -Imports and Exports -~~~~~~~~~~~~~~~~~~~ +Exports +~~~~~~~ When building a shared library any symbols marked as ``visibility=default`` will be exported. @@ -130,6 +130,17 @@ Finally, just like with native ELF linker the ``--export-dynamic`` flag can be used to export symbols in the executable which are marked as ``visibility=default``. +Imports +~~~~~~~ + +By default no undefined symbols are allowed in the final binary. The flag +``--allow-undefined`` results in a WebAssembly import being defined for each +undefined symbol. It is then up to the runtime to provide such symbols. + +Alternatively symbols can be marked in the source code as with the +``import_name`` and/or ``import_module`` clang attributes which signals that +they are expected to be undefined at static link time. + Garbage Collection ~~~~~~~~~~~~~~~~~~ |