Fixes PR45594.
In `ObjFile<ELFT>::initializeSymbols()`, for a defined symbol relative to
a discarded section (due to section group rules), it may have been
inserted as a lazy symbol. We need to demote it to an Undefined to
enable the `discarded section` error happened in a later pass.
Add `LazyObjFile::fetched` (if true) and `ArchiveFile::parsed` (if
false) to represent that there is an ongoing lazy symbol fetch and we
should replace the current lazy symbol with an Undefined, instead of
calling `Symbol::resolve` (`Symbol::resolve` should be called if the lazy
symbol was added by an unrelated archive/lazy object).
As a side result, one small issue in start-lib-comdat.s is now fixed.
The hack motivating D51892 will be unsupported: if
`.gnu.linkonce.t.__i686.get_pc_thunk.bx` in an archive is referenced
by another section, this will likely be errored unless the function is
also defined in a regular object file.
(Bringing back rL330869 would error `undefined symbol` instead of the
more relevant `discarded section`.)
Note, glibc i386's crti.o still works (PR31215), because
`.gnu.linkonce.t.__x86.get_pc_thunk.bx` is in crti.o (one of the first
regular object files in a linker command line).
Reviewed By: psmith
Differential Revision: https://reviews.llvm.org/D79300
Also change some options that have different semantics (cause confusion) in llvm-readelf mode:
-s => -S
-t => --symbols
-sd => --section-data
llvm-svn: 359651
This should never happen with correct programs, but it is trivial
write a testcase where lld would crash or report duplicated
symbols. We now behave like when an archive is used and include the
file only once.
llvm-svn: 272724
Fangrui Song