Temporary header file '/tmp/rKkIoLBUy9/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
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/OpenColorIO/OpenColorABI.h"
  #include "/usr/include/OpenColorIO/OpenColorIO.h"
  #include "/usr/include/OpenColorIO/oglapphelpers/glsl.h"
  #include "/usr/include/OpenColorIO/oglapphelpers/oglapp.h"
  #include "/usr/include/OpenColorIO/oiiohelpers/oiiohelpers.h"

  // add namespaces
  namespace fmt{typedef int tmp_add_type_1;}
  fmt::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace fmt{namespace v9{typedef int tmp_add_type_2;}}
  fmt::v9::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace fmt{namespace v9{namespace align{typedef int tmp_add_type_3;}}}
  fmt::v9::align::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace fmt{namespace v9{namespace detail{typedef int tmp_add_type_4;}}}
  fmt::v9::detail::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace fmt{namespace v9{namespace detail{namespace digits{typedef int tmp_add_type_5;}}}}
  fmt::v9::detail::digits::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace fmt{namespace v9{namespace detail{namespace dragonbox{typedef int tmp_add_type_6;}}}}
  fmt::v9::detail::dragonbox::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace fmt{namespace v9{namespace enums{typedef int tmp_add_type_7;}}}
  fmt::v9::enums::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace fmt{namespace v9{namespace literals{typedef int tmp_add_type_8;}}}
  fmt::v9::literals::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace fmt{namespace v9{namespace sign{typedef int tmp_add_type_9;}}}
  fmt::v9::sign::tmp_add_type_9 tmp_add_func_9(){return 0;};
  namespace fmt{namespace v9{namespace detail{namespace __anon5586f71d8f11{typedef int tmp_add_type_10;}}}}
  fmt::v9::detail::__anon5586f71d8f11::tmp_add_type_10 tmp_add_func_10(){return 0;};
  namespace fmt{namespace v9{namespace detail_exported{typedef int tmp_add_type_11;}}}
  fmt::v9::detail_exported::tmp_add_type_11 tmp_add_func_11(){return 0;};
  namespace OpenColorIO_v2_1{typedef int tmp_add_type_12;}
  OpenColorIO_v2_1::tmp_add_type_12 tmp_add_func_12(){return 0;};
  namespace OpenColorIO_v2_1{namespace ColorSpaceHelpers{typedef int tmp_add_type_13;}}
  OpenColorIO_v2_1::ColorSpaceHelpers::tmp_add_type_13 tmp_add_func_13(){return 0;};
  namespace OpenColorIO_v2_1{namespace DisplayViewHelpers{typedef int tmp_add_type_14;}}
  OpenColorIO_v2_1::DisplayViewHelpers::tmp_add_type_14 tmp_add_func_14(){return 0;};
  namespace OpenColorIO_v2_1{namespace DynamicPropertyValue{typedef int tmp_add_type_15;}}
  OpenColorIO_v2_1::DynamicPropertyValue::tmp_add_type_15 tmp_add_func_15(){return 0;};
  namespace OpenImageIO_v2_4{typedef int tmp_add_type_16;}
  OpenImageIO_v2_4::tmp_add_type_16 tmp_add_func_16(){return 0;};
  namespace OpenImageIO_v2_4{namespace bjhash{typedef int tmp_add_type_17;}}
  OpenImageIO_v2_4::bjhash::tmp_add_type_17 tmp_add_func_17(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{typedef int tmp_add_type_18;}}
  OpenImageIO_v2_4::farmhash::tmp_add_type_18 tmp_add_func_18(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashcc{typedef int tmp_add_type_19;}}}
  OpenImageIO_v2_4::farmhash::farmhashcc::tmp_add_type_19 tmp_add_func_19(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashmk{typedef int tmp_add_type_20;}}}
  OpenImageIO_v2_4::farmhash::farmhashmk::tmp_add_type_20 tmp_add_func_20(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashna{typedef int tmp_add_type_21;}}}
  OpenImageIO_v2_4::farmhash::farmhashna::tmp_add_type_21 tmp_add_func_21(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashnt{typedef int tmp_add_type_22;}}}
  OpenImageIO_v2_4::farmhash::farmhashnt::tmp_add_type_22 tmp_add_func_22(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashsa{typedef int tmp_add_type_23;}}}
  OpenImageIO_v2_4::farmhash::farmhashsa::tmp_add_type_23 tmp_add_func_23(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashsu{typedef int tmp_add_type_24;}}}
  OpenImageIO_v2_4::farmhash::farmhashsu::tmp_add_type_24 tmp_add_func_24(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashte{typedef int tmp_add_type_25;}}}
  OpenImageIO_v2_4::farmhash::farmhashte::tmp_add_type_25 tmp_add_func_25(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashuo{typedef int tmp_add_type_26;}}}
  OpenImageIO_v2_4::farmhash::farmhashuo::tmp_add_type_26 tmp_add_func_26(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace farmhashxo{typedef int tmp_add_type_27;}}}
  OpenImageIO_v2_4::farmhash::farmhashxo::tmp_add_type_27 tmp_add_func_27(){return 0;};
  namespace OpenImageIO_v2_4{namespace farmhash{namespace inlined{typedef int tmp_add_type_28;}}}
  OpenImageIO_v2_4::farmhash::inlined::tmp_add_type_28 tmp_add_func_28(){return 0;};
  namespace OpenImageIO_v2_4{namespace fasthash{typedef int tmp_add_type_29;}}
  OpenImageIO_v2_4::fasthash::tmp_add_type_29 tmp_add_func_29(){return 0;};
  namespace OpenImageIO_v2_4{namespace Filesystem{typedef int tmp_add_type_30;}}
  OpenImageIO_v2_4::Filesystem::tmp_add_type_30 tmp_add_func_30(){return 0;};
  namespace OpenImageIO_v2_4{namespace murmur{typedef int tmp_add_type_31;}}
  OpenImageIO_v2_4::murmur::tmp_add_type_31 tmp_add_func_31(){return 0;};
  namespace OpenImageIO_v2_4{namespace pvt{typedef int tmp_add_type_32;}}
  OpenImageIO_v2_4::pvt::tmp_add_type_32 tmp_add_func_32(){return 0;};
  namespace OpenImageIO_v2_4{namespace simd{typedef int tmp_add_type_33;}}
  OpenImageIO_v2_4::simd::tmp_add_type_33 tmp_add_func_33(){return 0;};
  namespace OpenImageIO_v2_4{namespace Strutil{typedef int tmp_add_type_34;}}
  OpenImageIO_v2_4::Strutil::tmp_add_type_34 tmp_add_func_34(){return 0;};
  namespace OpenImageIO_v2_4{namespace Strutil{namespace fmt{typedef int tmp_add_type_35;}}}
  OpenImageIO_v2_4::Strutil::fmt::tmp_add_type_35 tmp_add_func_35(){return 0;};
  namespace OpenImageIO_v2_4{namespace Strutil{namespace old{typedef int tmp_add_type_36;}}}
  OpenImageIO_v2_4::Strutil::old::tmp_add_type_36 tmp_add_func_36(){return 0;};
  namespace OpenImageIO_v2_4{namespace Strutil{namespace pvt{typedef int tmp_add_type_37;}}}
  OpenImageIO_v2_4::Strutil::pvt::tmp_add_type_37 tmp_add_func_37(){return 0;};
  namespace OpenImageIO_v2_4{namespace Strutil{namespace sync{typedef int tmp_add_type_38;}}}
  OpenImageIO_v2_4::Strutil::sync::tmp_add_type_38 tmp_add_func_38(){return 0;};
  namespace OpenImageIO_v2_4{namespace xxhash{typedef int tmp_add_type_39;}}
  OpenImageIO_v2_4::xxhash::tmp_add_type_39 tmp_add_func_39(){return 0;};

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/rKkIoLBUy9/dump1.h"