Temporary header file '/tmp/_cUWpcS1Ka/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/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/freetypefont.h" #include "/usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/glyph.h" #include "/usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/glyphsview.h" #include "/usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/harfbuzzfont.h" #include "/usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/mainwindow.h" #include "/usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/ttfparserfont.h" The GCC parameters: gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/_cUWpcS1Ka/dump1.h" In file included from /tmp/_cUWpcS1Ka/dump1.h:12: /usr/share/cargo/registry/ttf-parser-0.15.2/testing-tools/font-view/freetypefont.h:3:10: fatal error: ft2build.h: No such file or directory 3 | #include | ^~~~~~~~~~~~ compilation terminated.