Temporary header file '/tmp/ns90aeXIc0/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/pixman-1/pixman.h"

  // add classes
  pixman_box16* tmp_add_class_0;
  pixman_box32* tmp_add_class_1;
  pixman_color* tmp_add_class_2;
  pixman_edge* tmp_add_class_3;
  pixman_f_transform* tmp_add_class_4;
  pixman_f_vector* tmp_add_class_5;
  pixman_gradient_stop* tmp_add_class_6;
  pixman_indexed* tmp_add_class_7;
  pixman_line_fixed* tmp_add_class_8;
  pixman_point_fixed* tmp_add_class_9;
  pixman_rectangle16* tmp_add_class_10;
  pixman_rectangle32* tmp_add_class_11;
  pixman_region16* tmp_add_class_12;
  pixman_region16_data* tmp_add_class_13;
  pixman_region32* tmp_add_class_14;
  pixman_region32_data* tmp_add_class_15;
  pixman_span_fix* tmp_add_class_16;
  pixman_transform* tmp_add_class_17;
  pixman_trap* tmp_add_class_18;
  pixman_trapezoid* tmp_add_class_19;
  pixman_triangle* tmp_add_class_20;
  pixman_vector* tmp_add_class_21;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/ns90aeXIc0/dump1.h"  -I/usr/include/pixman-1