https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101118
Bug ID: 101118
Summary: coroutines: unexpected ODR warning for coroutine frame
type in LTO builds
Product: gcc
Version: 11.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nilsgladitz at gmail dot com
Target Milestone: ---
Created attachment 51033
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51033&action=edit
Testcase source files
The attached sources files are reduced from a C++ project using boost::asio and
coroutines.
I don't fully understand it but compiling them with vanilla GCC 11.1.0 like
this:
g++ -std=c++2a -fPIC -fcoroutines -Wall -flto -fno-fat-lto-objects -shared
foo.cpp bar.cpp
unexpectedly produces the following diagnostic:
boost.hpp:81:3: warning: type ‘struct
_ZN5boost4asio1gIiFviEE2abIiEENS0_9awaitableIiiEET_.frame’ violates the C++ One
Definition Rule [-Wodr]
81 | }
| ^
boost.hpp:81:3: note: a different type is defined in another translation unit
81 | }
| ^
boost.hpp:79:34: note: the first difference of corresponding definitions is
field ‘__D.9984.3.4’
79 | template <typename k> static w ab(k ai) {
| ^
boost.hpp:79:34: note: a field with different name is defined in another
translation unit
79 | template <typename k> static w ab(k ai) {
|
