Temporary header file '/tmp/3TTXw7r_gP/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/ETL/ETL/_angle.h"
  #include "/usr/include/ETL/ETL/_bezier.h"
  #include "/usr/include/ETL/ETL/_bezier_angle.h"
  #include "/usr/include/ETL/ETL/_boxblur.h"
  #include "/usr/include/ETL/ETL/_calculus.h"
  #include "/usr/include/ETL/ETL/_curve_func.h"
  #include "/usr/include/ETL/ETL/_fixed.h"
  #include "/usr/include/ETL/ETL/_gaussian.h"
  #include "/usr/include/ETL/ETL/_handle.h"
  #include "/usr/include/ETL/ETL/_hermite.h"
  #include "/usr/include/ETL/ETL/_misc.h"
  #include "/usr/include/ETL/ETL/_pen.h"
  #include "/usr/include/ETL/ETL/_ref_count.h"
  #include "/usr/include/ETL/ETL/_smart_ptr.h"
  #include "/usr/include/ETL/ETL/_stringf.h"
  #include "/usr/include/ETL/ETL/_surface.h"
  #include "/usr/include/ETL/ETL/etl_config.h"
  #include "/usr/include/ETL/ETL/etl_profile.h"

  // add namespaces
  namespace etl{typedef int tmp_add_type_1;}
  etl::tmp_add_type_1 tmp_add_func_1(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/3TTXw7r_gP/dump1.h"  -I/usr/include/ETL

In file included from /tmp/3TTXw7r_gP/dump1.h:26:
/usr/include/ETL/ETL/_stringf.h:40:10: fatal error: glibmm/miscutils.h: No such file or directory
   40 | #include <glibmm/miscutils.h>
      |          ^~~~~~~~~~~~~~~~~~~~
compilation terminated.