Temporary header file '/tmp/m9llCNKIBB/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/otf2/OTF2_Archive.h"
  #include "/usr/include/otf2/OTF2_AttributeList.h"
  #include "/usr/include/otf2/OTF2_AttributeValue.h"
  #include "/usr/include/otf2/OTF2_Callbacks.h"
  #include "/usr/include/otf2/OTF2_DefReader.h"
  #include "/usr/include/otf2/OTF2_DefReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_DefWriter.h"
  #include "/usr/include/otf2/OTF2_Definitions.h"
  #include "/usr/include/otf2/OTF2_ErrorCodes.h"
  #include "/usr/include/otf2/OTF2_EventSizeEstimator.h"
  #include "/usr/include/otf2/OTF2_Events.h"
  #include "/usr/include/otf2/OTF2_EvtReader.h"
  #include "/usr/include/otf2/OTF2_EvtReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_EvtWriter.h"
  #include "/usr/include/otf2/OTF2_GeneralDefinitions.h"
  #include "/usr/include/otf2/OTF2_GlobalDefReader.h"
  #include "/usr/include/otf2/OTF2_GlobalDefReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_GlobalDefWriter.h"
  #include "/usr/include/otf2/OTF2_GlobalEvtReader.h"
  #include "/usr/include/otf2/OTF2_GlobalEvtReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_GlobalSnapReader.h"
  #include "/usr/include/otf2/OTF2_GlobalSnapReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_IdMap.h"
  #include "/usr/include/otf2/OTF2_MPI_Collectives.h"
  #include "/usr/include/otf2/OTF2_Marker.h"
  #include "/usr/include/otf2/OTF2_MarkerReader.h"
  #include "/usr/include/otf2/OTF2_MarkerReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_MarkerWriter.h"
  #include "/usr/include/otf2/OTF2_OpenMP_Locks.h"
  #include "/usr/include/otf2/OTF2_Pthread_Locks.h"
  #include "/usr/include/otf2/OTF2_Reader.h"
  #include "/usr/include/otf2/OTF2_SnapReader.h"
  #include "/usr/include/otf2/OTF2_SnapReaderCallbacks.h"
  #include "/usr/include/otf2/OTF2_SnapWriter.h"
  #include "/usr/include/otf2/OTF2_Thumbnail.h"
  #include "/usr/include/otf2/otf2.h"
  #include "/usr/include/otf2/otf2_compiler.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/m9llCNKIBB/dump1.h"

In file included from /tmp/m9llCNKIBB/dump1.h:35:
/usr/include/otf2/OTF2_MPI_Collectives.h:365:10: fatal error: mpi.h: No such file or directory
  365 | #include <mpi.h>
      |          ^~~~~~~
compilation terminated.