The symbol resolution rules for versioned symbols are:
- foo@@v1 (default version) resolves both undefined foo and foo@v1
- foo@v1 (non-default version) resolves undefined foo@v1
Note, foo@@v1 must be defined (the assembler errors if attempting to
create an undefined foo@@v1).
For defined foo@@v1 in a shared object, we call SymbolTable::addSymbol twice,
one for foo and the other for foo@v1. We don't do the same for object files, so
foo@@v1 defined in one object file incorrectly does not resolve a foo@v1
reference in another object file.
This patch fixes the issue by reusing the --wrap code to redirect symbols in
object files. This has to be done after processing input files because
foo and foo@v1 are two separate symbols if we haven't seen foo@@v1.
Add a helper Symbol::getVersionSuffix to retrieve the optional trailing
@... or @@... from the possibly truncated symbol name.
Depends on D92258