Temporary header file '/tmp/TwomV_LtGK/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/KF5/KDAV/kdav/davcollection.h"
  #include "/usr/include/KF5/KDAV/kdav/davcollectiondeletejob.h"
  #include "/usr/include/KF5/KDAV/kdav/davcollectionmodifyjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davcollectionsfetchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davcollectionsmultifetchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/daverror.h"
  #include "/usr/include/KF5/KDAV/kdav/davitem.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemcreatejob.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemdeletejob.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemfetchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemmodifyjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemsfetchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davitemslistjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davjobbase.h"
  #include "/usr/include/KF5/KDAV/kdav/davprincipalhomesetsfetchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davprincipalsearchjob.h"
  #include "/usr/include/KF5/KDAV/kdav/davurl.h"
  #include "/usr/include/KF5/KDAV/kdav/enums.h"
  #include "/usr/include/KF5/KDAV/kdav/etagcache.h"
  #include "/usr/include/KF5/KDAV/kdav/kdav_export.h"
  #include "/usr/include/KF5/KDAV/kdav/protocolinfo.h"
  #include "/usr/include/KF5/KDAV/kdav_version.h"

  // add namespaces
  namespace KDAV{typedef int tmp_add_type_1;}
  KDAV::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace QAlgorithmsPrivate{typedef int tmp_add_type_2;}
  QAlgorithmsPrivate::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace Qt{typedef int tmp_add_type_3;}
  Qt::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace QtGlobalStatic{typedef int tmp_add_type_4;}
  QtGlobalStatic::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace QtPrivate{typedef int tmp_add_type_5;}
  QtPrivate::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace QtPrivate{namespace DeprecatedRefClassBehavior{typedef int tmp_add_type_6;}}
  QtPrivate::DeprecatedRefClassBehavior::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace QtPrivate{namespace SwapExceptionTester{typedef int tmp_add_type_7;}}
  QtPrivate::SwapExceptionTester::tmp_add_type_7 tmp_add_func_7(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/TwomV_LtGK/dump1.h"  -I/usr/include/arm-linux-gnueabihf/qt5 -I/usr/include/arm-linux-gnueabihf/qt5/QtCore

In file included from /usr/include/KF5/KDAV/kdav/davcollectiondeletejob.h:12,
                 from /tmp/TwomV_LtGK/dump1.h:13:
/usr/include/KF5/KDAV/kdav/davjobbase.h:12:10: fatal error: KJob: No such file or directory
   12 | #include <KJob>
      |          ^~~~~~
compilation terminated.