https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124582
Bug ID: 124582
Summary: Conflicting imported declaration with both modules and
reflection enabled
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nick.weihs at gmail dot com
Target Milestone: ---
Using the snapshot build from Saturday of this week, I'm getting the following
error while compiling a project that uses both reflection and modules. I'm not
entirely sure if the problem is in gcc or cmake but I figure this is a good
place to start.
In file included from /usr/include/pthread.h:26,
from
/usr/include/c++/16.0.0/x86_64-pc-linux-gnu/bits/gthr-default.h:35,
from
/usr/include/c++/16.0.0/x86_64-pc-linux-gnu/bits/gthr.h:157,
from /usr/include/c++/16.0.0/bits/atomic_wait.h:40,
from /usr/include/c++/16.0.0/bits/atomic_base.h:43,
from /usr/include/c++/16.0.0/atomic:53,
from Types.ixx:3,
of module YT:Types, imported at BlockTable.ixx:11:
/usr/include/bits/pthreadtypes.h:72:3: error: conflicting imported declaration
‘typedef union pthread_mutex_t pthread_mutex_t’ [-Wtemplate-body]
72 | } pthread_mutex_t;
| ^~~~~~~~~~~~~~~
In file included from /usr/include/pthread.h:26,
from
/usr/include/c++/16.0.0/x86_64-pc-linux-gnu/bits/gthr-default.h:35,
from
/usr/include/c++/16.0.0/x86_64-pc-linux-gnu/bits/gthr.h:157,
from /usr/include/c++/16.0.0/bits/atomic_wait.h:40,
from /usr/include/c++/16.0.0/bits/atomic_base.h:43,
from /usr/include/c++/16.0.0/atomic:53,
from BlockTable.ixx:3:
/usr/include/bits/pthreadtypes.h:72:3: note: existing declaration ‘typedef
union pthread_mutex_t pthread_mutex_t’
72 | } pthread_mutex_t;
| ^~~~~~~~~~~~~~~
BlockTable.ixx:622:9: note: during load of binding ‘YT::Mutex@YT:Types’
622 | Mutex m_BlockAllocMutex;
Somehow it's telling me that there's conflicting symbols, however the two
symbols it's telling me are conflicted are exactly the same. This only happens
if I enable -freflection. Without that flag it compiles fine
I've uploaded a trimmed down version of the problem along with a simple build
script here:
https://github.com/hamfirst/gccbug
