Temporary header file '/tmp/fP5N_nOhUW/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/radsec/radius.h"
  #include "/usr/include/radsec/radsec-impl.h"
  #include "/usr/include/radsec/radsec.h"
  #include "/usr/include/radsec/request-impl.h"
  #include "/usr/include/radsec/request.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/fP5N_nOhUW/dump1.h"

In file included from /tmp/fP5N_nOhUW/dump1.h:13:
/usr/include/radsec/radsec-impl.h:10:10: fatal error: event2/util.h: No such file or directory
   10 | #include <event2/util.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.