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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102341] [modules] "error: conflicting exporting
 declaration" for anything previously declared
Date: Wed, 15 Sep 2021 11:28:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102341

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-09-15

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #2)
> This seems to make it impractical to create a module interface unit for a=
ny
> library that is currently defined in header files, such as libstdc++.

I can work around this by adding 'export' into the headers themselves (as a
macro that expands to nothing unless included from the module interface uni=
t).=