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Diffstat (limited to 'contrib/llvm-project/lld/docs/WebAssembly.rst')
| -rw-r--r-- | contrib/llvm-project/lld/docs/WebAssembly.rst | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/contrib/llvm-project/lld/docs/WebAssembly.rst b/contrib/llvm-project/lld/docs/WebAssembly.rst index b23f2cd462b4..36062f5f0ac0 100644 --- a/contrib/llvm-project/lld/docs/WebAssembly.rst +++ b/contrib/llvm-project/lld/docs/WebAssembly.rst @@ -39,6 +39,10 @@ WebAssembly-specific options: Export all symbols (normally combined with --no-gc-sections) + Note that this will not export linker-generated mutable globals unless + the resulting binaryen already includes the 'mutable-globals' features + since that would otherwise create and invalid binaryen. + .. option:: --export-dynamic When building an executable, export any non-hidden symbols. By default only @@ -67,7 +71,31 @@ WebAssembly-specific options: .. option:: --allow-undefined - Allow undefined symbols in linked binary. + Allow undefined symbols in linked binary. This is the legacy + flag which corresponds to ``--unresolved-symbols=import-functions``. + +.. option:: --unresolved-symbols=<method> + + This is a more full featured version of ``--allow-undefined``. + The semanatics of the different methods are as follows: + + report-all: + + Report all unresolved symbols. This is the default. Normally the linker + will generate an error message for each reported unresolved symbol but the + option ``--warn-unresolved-symbols`` can change this to a warning. + + ignore-all: + + Resolve all undefined symbols to zero. For data and function addresses + this is trivial. For direct function calls, the linker will generate a + trapping stub function in place of the undefined function. + + import-functions: + + Generate WebAssembly imports for any undefined functions. Undefined data + symbols are resolved to zero as in ``ignore-all``. This corresponds to + the legacy ``--allow-undefined`` flag. .. option:: --import-memory |