gcc version 11.4.0 (Ubuntu 11.4.0-1ubuntu1~22.04) 上编译问题笔记

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>

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