Temporary header file '/tmp/HZHAN5XGsn/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/lv2-c++-tools/namespaces.hpp"
  #include "/usr/include/lv2-c++-tools/query.hpp"
  #include "/usr/include/lv2-c++-tools/rdf.hpp"
  #include "/usr/include/lv2-c++-tools/turtleparser.hpp"
  #include "/usr/include/lv2-c++-tools/unicode.hpp"

  // add namespaces
  namespace PAQ{typedef int tmp_add_type_1;}
  PAQ::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/HZHAN5XGsn/dump1.h"

In file included from /tmp/HZHAN5XGsn/dump1.h:15:
/usr/include/lv2-c++-tools/turtleparser.hpp:26:10: fatal error: boost/spirit/include/classic_core.hpp: No such file or directory
   26 | #include <boost/spirit/include/classic_core.hpp>
      |          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.