Temporary header file '/tmp/HL7oNyEViG/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 // add includes #include "/usr/include/mirwayland/mir/wayland/wayland_base.h" // add namespaces namespace mir{typedef int tmp_add_type_1;} mir::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/HL7oNyEViG/dump1.h" -I/usr/include/mircore In file included from /tmp/HL7oNyEViG/dump1.h:11: /usr/include/mirwayland/mir/wayland/wayland_base.h:22:10: fatal error: boost/throw_exception.hpp: No such file or directory 22 | #include | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated.