Temporary header file '/tmp/A1EHeygHgy/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/guacamole/argv-constants.h"
  #include "/usr/include/guacamole/argv-fntypes.h"
  #include "/usr/include/guacamole/argv.h"
  #include "/usr/include/guacamole/audio-fntypes.h"
  #include "/usr/include/guacamole/audio-types.h"
  #include "/usr/include/guacamole/audio.h"
  #include "/usr/include/guacamole/client-constants.h"
  #include "/usr/include/guacamole/client-fntypes.h"
  #include "/usr/include/guacamole/client-types.h"
  #include "/usr/include/guacamole/client.h"
  #include "/usr/include/guacamole/error-types.h"
  #include "/usr/include/guacamole/error.h"
  #include "/usr/include/guacamole/hash.h"
  #include "/usr/include/guacamole/layer-types.h"
  #include "/usr/include/guacamole/layer.h"
  #include "/usr/include/guacamole/object-types.h"
  #include "/usr/include/guacamole/object.h"
  #include "/usr/include/guacamole/parser-constants.h"
  #include "/usr/include/guacamole/parser-types.h"
  #include "/usr/include/guacamole/parser.h"
  #include "/usr/include/guacamole/plugin-constants.h"
  #include "/usr/include/guacamole/plugin.h"
  #include "/usr/include/guacamole/pool-types.h"
  #include "/usr/include/guacamole/pool.h"
  #include "/usr/include/guacamole/protocol-constants.h"
  #include "/usr/include/guacamole/protocol-types.h"
  #include "/usr/include/guacamole/protocol.h"
  #include "/usr/include/guacamole/socket-constants.h"
  #include "/usr/include/guacamole/socket-fntypes.h"
  #include "/usr/include/guacamole/socket-ssl.h"
  #include "/usr/include/guacamole/socket-types.h"
  #include "/usr/include/guacamole/socket.h"
  #include "/usr/include/guacamole/stream-types.h"
  #include "/usr/include/guacamole/stream.h"
  #include "/usr/include/guacamole/string.h"
  #include "/usr/include/guacamole/timestamp-types.h"
  #include "/usr/include/guacamole/timestamp.h"
  #include "/usr/include/guacamole/unicode.h"
  #include "/usr/include/guacamole/user-constants.h"
  #include "/usr/include/guacamole/user-fntypes.h"
  #include "/usr/include/guacamole/user-types.h"
  #include "/usr/include/guacamole/user.h"
  #include "/usr/include/guacamole/wol-constants.h"
  #include "/usr/include/guacamole/wol.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/A1EHeygHgy/dump1.h"

In file included from /tmp/A1EHeygHgy/dump1.h:21:
/usr/include/guacamole/client.h:41:10: fatal error: cairo/cairo.h: No such file or directory
   41 | #include <cairo/cairo.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.