Temporary header file '/tmp/6W2xXTFXed/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/meshoptimizer.h" // add classes meshopt_Allocator* tmp_add_class_0; meshopt_Bounds* tmp_add_class_1; meshopt_Meshlet* tmp_add_class_2; meshopt_OverdrawStatistics* tmp_add_class_3; meshopt_Stream* tmp_add_class_4; meshopt_VertexCacheStatistics* tmp_add_class_5; meshopt_VertexFetchStatistics* tmp_add_class_6; The GCC parameters: gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/6W2xXTFXed/dump1.h"