Temporary header file '/tmp/N7ydXDM3SX/dump1.h' with the following content will be compiled to create GCC translation unit dump: // add defines #define __STDC_VERSION__ 201710L #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/fclib.h" // add classes fclib_global* tmp_add_class_0; fclib_info* tmp_add_class_1; fclib_local* tmp_add_class_2; fclib_matrix* tmp_add_class_3; fclib_matrix_info* tmp_add_class_4; fclib_solution* tmp_add_class_5; The GCC parameters: gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/N7ydXDM3SX/dump1.h"