[Issue 14828] duplicate symbol __ModuleInfoZ depending on ordering of files passed to dmd

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=14828

Kenji Hara <k.hara.pg at gmail.com> changed:

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--- Comment #12 from Kenji Hara <k.hara.pg at gmail.com> ---
Created attachment 1538
  --> https://issues.dlang.org/attachment.cgi?id=1538&action=edit
A little updated test case

OK, I understand the issue mechanism. It's obvious from the list files of
libproj.lib and out.obj. (`make genlist`)

With the `make a1f` command, the last link for out.exe will pull foo2.obj in
the lib file, because:

The instantiated function _D5stdio12__T7writelnZ7writelnFNaNbNiNfAyaZv uses
_D5stdio7__arrayZ for array bounds check, but it's stored in foo2.obj in the
lib.

By that, the symbol _D4foo212__ModuleInfoZ in lib will also linked because it's
in foo2.obj.

On the other hand, out.obj also contains _D4foo212__ModuleInfoZ, then they
conflicts each other.

----

The essential fix I think is: when the lib file is compiled, the helper
functions
(__array, etc) of non-root modules (e.g. stdio) should be separated their own
obj file.

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