https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100429
Bug ID: 100429
Summary: threading support on windows
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: unlvsur at live dot com
Target Milestone: ---
It looks like libgcc DOES provide threading support for windows. However,
_GLIBCXX_HAS_GTHREADS does not get defined for libstdc++, I guess it is another
libtool issue.
SO GOOD, if we fix them, we will have our own threading support for GCC on
windows.
https://github.com/gcc-mirror/gcc/blob/master/libgcc/config/i386/gthr-win32.h
_GLIBCXX_HAS_GTHREADS
In file included from
d:\toolchains\include\c++\12.0.0\x86_64-w64-mingw32\bits\gthr.h:148,
from b.cc:4:
d:\toolchains\include\c++\12.0.0\x86_64-w64-mingw32\bits\gthr-default.h: In
function 'int __gthread_setspecific(__gthread_key_t, const void*)':
d:\toolchains\include\c++\12.0.0\x86_64-w64-mingw32\bits\gthr-default.h:629:27:
error: types may not be defined in casts
629 | if (TlsSetValue (__key, CONST_CAST2(void *, const void *, __ptr)) !=
0)
| ^~~~~~~~~~~
BTW. there is another bug in libgcc. This does not work.
An alternative code should be if (TlsSetValue (__key, void*( __ptr)) != 0)
