[Bug ld/30140] LD does not link PE executable with symbols from DEF file

[martin at martin dot st]

https://sourceware.org/bugzilla/show_bug.cgi?id=30140

Martin Storsjö <martin at martin dot st> changed:

           What    |Removed                     |Added
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                 CC|                            |martin at martin dot st

--- Comment #2 from Martin Storsjö <martin at martin dot st> ---
> I think that this is an issue in LD because it should be able to handle DEF 
> file
> correctly. Or if LD does not support DEF files then it should throw 
> meaningful human
> readable error. Not that "symbol not defined" because it *is* defined in
> test-library.def file.

The issue is that LD _does_ take DEF files as input - but not in the way you
seem to assume.

When you link a DLL (or EXE for that matter) and pass it a DEF file at the same
time, the DEF file overrides what symbols to export, instead of the regular
logic (functions marked dllexport, or exporting everything modulo explicit
ignores, etc). See the section in the manual:
https://sourceware.org/binutils/docs/ld/WIN32.html#index-using-a-DEF-file

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