Before this, LLD sets OrdinalBase to 0, which deviates from usual
practices. This technically would allow LLD to export a symbol using
ordinal 0, however LLD never use export ordinal 0, which results in
binaries with export tables always having an empty export at ordinal 0.
This change makes LLD set OrdinalBase to 1 and not create the empty
export with ordinal 0, which makes its behaviour more in line with both
the MSVC linker and the GNU linker.
Reviewed By: mstorsjo
Differential Revision: https://reviews.llvm.org/D134140
When an object file contains an export directive, we normally do some
amount of deferred processing of them at the end of the linking
process. The -includeoptional option was handled after this, and
any object files (defining new exports) weren't handled.
Move the handling of the -includeoptional into the same late loop
which does the fixups for e.g. export directives.
Ideally, this would also be done for object files that are pulled
in by the wrap options, and for mingw autoimports, but those changes
require more modifications, to make them safe for potentially
being executed multiple times.
This fixes https://github.com/llvm/llvm-project/issues/57243.
Differential Revision: https://reviews.llvm.org/D132361
