Temporary header file '/tmp/LC7NBrxwgv/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/i686-w64-mingw32/include/assuan.h"
  #include "/usr/x86_64-w64-mingw32/include/assuan.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/LC7NBrxwgv/dump1.h"  -I/usr/x86_64-w64-mingw32/include

In file included from /usr/x86_64-w64-mingw32/include/corecrt.h:10,
                 from /usr/x86_64-w64-mingw32/include/corecrt_stdio_config.h:10,
                 from /usr/x86_64-w64-mingw32/include/stdio.h:9,
                 from /usr/i686-w64-mingw32/include/assuan.h:34,
                 from /tmp/LC7NBrxwgv/dump1.h:12:
/usr/x86_64-w64-mingw32/include/_mingw.h:278:2: error: #error Only Win32 target is supported!
  278 | #error Only Win32 target is supported!
      |  ^~~~~
In file included from /usr/i686-w64-mingw32/include/assuan.h:35:
/usr/x86_64-w64-mingw32/include/sys/types.h:10:2: error: #error Only Win32 target is supported!
   10 | #error Only Win32 target is supported!
      |  ^~~~~
In file included from /usr/x86_64-w64-mingw32/include/stdarg.h:140,
                 from /usr/i686-w64-mingw32/include/assuan.h:37:
/usr/x86_64-w64-mingw32/include/_mingw_stdarg.h:11:2: error: #error Only Win32 target is supported!
   11 | #error Only Win32 target is supported!
      |  ^~~~~
In file included from /usr/x86_64-w64-mingw32/include/stdlib.h:766,
                 from /usr/x86_64-w64-mingw32/include/combaseapi.h:129,
                 from /usr/x86_64-w64-mingw32/include/objbase.h:14,
                 from /usr/x86_64-w64-mingw32/include/ole2.h:17,
                 from /usr/x86_64-w64-mingw32/include/wtypes.h:13,
                 from /usr/x86_64-w64-mingw32/include/winscard.h:10,
                 from /usr/x86_64-w64-mingw32/include/windows.h:97,
                 from /usr/x86_64-w64-mingw32/include/winsock2.h:23,
                 from /usr/i686-w64-mingw32/include/assuan.h:40:
/usr/x86_64-w64-mingw32/include/malloc.h:80:10: fatal error: mm_malloc.h: No such file or directory
   80 | #include <mm_malloc.h>
      |          ^~~~~~~~~~~~~
compilation terminated.