Temporary header file '/tmp/QPU1OfoYR3/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/include/tumbler-1/tumbler/tumbler-cache-plugin.h"
  #include "/usr/include/tumbler-1/tumbler/tumbler-marshal.h"
  #include "/usr/include/tumbler-1/tumbler/tumbler-util.h"
  #include "/usr/include/tumbler-1/tumbler/tumbler.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/QPU1OfoYR3/dump1.h"  -I/usr/include/tumbler-1 -I/usr/include/glib-2.0 -I/lib/arm-linux-gnueabihf/glib-2.0/include

In file included from /usr/include/tumbler-1/tumbler/tumbler-cache-plugin.h:24,
                 from /tmp/QPU1OfoYR3/dump1.h:12:
/usr/include/tumbler-1/tumbler/tumbler-cache.h:22:2: error: #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
   22 | #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
      |  ^~~~~
In file included from /usr/include/tumbler-1/tumbler/tumbler-cache.h:28:
/usr/include/tumbler-1/tumbler/tumbler-thumbnail.h:22:2: error: #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
   22 | #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
      |  ^~~~~
In file included from /usr/include/tumbler-1/tumbler/tumbler-thumbnail.h:30:
/usr/include/tumbler-1/tumbler/tumbler-enum-types.h:22:2: error: #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
   22 | #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
      |  ^~~~~
In file included from /usr/include/tumbler-1/tumbler/tumbler-thumbnail.h:31:
/usr/include/tumbler-1/tumbler/tumbler-thumbnail-flavor.h:22:2: error: #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
   22 | #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
      |  ^~~~~
In file included from /usr/include/tumbler-1/tumbler/tumbler-cache.h:29:
/usr/include/tumbler-1/tumbler/tumbler-thumbnail-flavor.h:22:2: error: #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
   22 | #error "Only <tumbler/tumbler.h> may be included directly. This file might disappear or change contents."
      |  ^~~~~
In file included from /tmp/QPU1OfoYR3/dump1.h:14:
/usr/include/tumbler-1/tumbler/tumbler-util.h:25:10: fatal error: gdk-pixbuf/gdk-pixbuf.h: No such file or directory
   25 | #include <gdk-pixbuf/gdk-pixbuf.h>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.