Temporary header file '/tmp/S4exV8MGh8/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#define _FILE_OFFSET_BITS 64
#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/vdt/asin.h"
  #include "/usr/include/vdt/atan.h"
  #include "/usr/include/vdt/atan2.h"
  #include "/usr/include/vdt/cos.h"
  #include "/usr/include/vdt/exp.h"
  #include "/usr/include/vdt/identity.h"
  #include "/usr/include/vdt/inv.h"
  #include "/usr/include/vdt/log.h"
  #include "/usr/include/vdt/sin.h"
  #include "/usr/include/vdt/sincos.h"
  #include "/usr/include/vdt/sqrt.h"
  #include "/usr/include/vdt/tan.h"
  #include "/usr/include/vdt/tanh.h"
  #include "/usr/include/vdt/vdtMath.h"
  #include "/usr/include/vdt/vdtcore_common.h"

  // add namespaces
  namespace vdt{typedef int tmp_add_type_1;}
  vdt::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace vdt{namespace details{typedef int tmp_add_type_2;}}
  vdt::details::tmp_add_type_2 tmp_add_func_2(){return 0;};

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/S4exV8MGh8/dump1.h"