编译错误如下：
In file included from /usr/include/glib-2.0/glib/glib-typeof.h:39,
from /usr/include/glib-2.0/glib/gatomic.h:28,
from /usr/include/glib-2.0/glib/gthread.h:32,
from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
from /usr/include/glib-2.0/glib.h:32,
from ../libqemu/qemu-common.h:39,
from ../libqemu/qemu-aio.h:17,
from ../libqemu/block.h:4,
from ../libqemu/block_int.h:27,
from Block.h:6,
from Block.cpp:1:
/usr/include/c++/11/type_traits:1006:3: error: template with C linkage
1006 | template<typename _Tp>
| ^~~~~~~~
In file included from Block.cpp:1:
Block.h:4:1: note: 'extern "C"' linkage started here
4 | extern "C"
| ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/glib-typeof.h:39,
from /usr/include/glib-2.0/glib/gatomic.h:28,
from /usr/include/glib-2.0/glib/gthread.h:32,
from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
from /usr/include/glib-2.0/glib.h:32,
from ../libqemu/qemu-common.h:39,
from ../libqemu/qemu-aio.h:17,
from ../libqemu/block.h:4,
from ../libqemu/block_int.h:27,
from Block.h:6,
from Block.cpp:1:
/usr/include/c++/11/type_traits:1015:3: error: template with C linkage
1015 | template<typename _Tp, typename... _Args>
| ^~~~~~~~
In file included from Block.cpp:1:
Block.h:4:1: note: 'extern "C"' linkage started here
4 | extern "C"
| ^~~~~~~~~~
In file included from /usr/include/glib-2.0/glib/glib-typeof.h:39,
from /usr/include/glib-2.0/glib/gatomic.h:28,
from /usr/include/glib-2.0/glib/gthread.h:32,
from /usr/include/glib-2.0/glib/gasyncqueue.h:32,
from /usr/include/glib-2.0/glib.h:32,
from ../libqemu/qemu-common.h:39,
from ../libqemu/qemu-aio.h:17,
from ../libqemu/block.h:4,
from ../libqemu/block_int.h:27,
from Block.h:6,
from Block.cpp:1:
/usr/include/c++/11/type_traits:1021:3: error: template with C linkage
1021 | template<typename _Tp, typename... _Args>
| ^~~~~~~~
In file included from Block.cpp:1:
解决方法：
修改了Block.cpp，在其#include "Block.h"之前添加 #include <glib.h>