Temporary header file '/tmp/d3cd8yLea9/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#define _FILE_OFFSET_BITS 64
#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/Spectra/DavidsonSymEigsSolver.h"
  #include "/usr/include/Spectra/GenEigsBase.h"
  #include "/usr/include/Spectra/GenEigsComplexShiftSolver.h"
  #include "/usr/include/Spectra/GenEigsRealShiftSolver.h"
  #include "/usr/include/Spectra/GenEigsSolver.h"
  #include "/usr/include/Spectra/JDSymEigsBase.h"
  #include "/usr/include/Spectra/LinAlg/Arnoldi.h"
  #include "/usr/include/Spectra/LinAlg/BKLDLT.h"
  #include "/usr/include/Spectra/LinAlg/DoubleShiftQR.h"
  #include "/usr/include/Spectra/LinAlg/Lanczos.h"
  #include "/usr/include/Spectra/LinAlg/Orthogonalization.h"
  #include "/usr/include/Spectra/LinAlg/RitzPairs.h"
  #include "/usr/include/Spectra/LinAlg/SearchSpace.h"
  #include "/usr/include/Spectra/LinAlg/TridiagEigen.h"
  #include "/usr/include/Spectra/LinAlg/UpperHessenbergEigen.h"
  #include "/usr/include/Spectra/LinAlg/UpperHessenbergQR.h"
  #include "/usr/include/Spectra/LinAlg/UpperHessenbergSchur.h"
  #include "/usr/include/Spectra/MatOp/DenseCholesky.h"
  #include "/usr/include/Spectra/MatOp/DenseGenComplexShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/DenseGenMatProd.h"
  #include "/usr/include/Spectra/MatOp/DenseGenRealShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/DenseSymMatProd.h"
  #include "/usr/include/Spectra/MatOp/DenseSymShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/SparseCholesky.h"
  #include "/usr/include/Spectra/MatOp/SparseGenComplexShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/SparseGenMatProd.h"
  #include "/usr/include/Spectra/MatOp/SparseGenRealShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/SparseRegularInverse.h"
  #include "/usr/include/Spectra/MatOp/SparseSymMatProd.h"
  #include "/usr/include/Spectra/MatOp/SparseSymShiftSolve.h"
  #include "/usr/include/Spectra/MatOp/SymShiftInvert.h"
  #include "/usr/include/Spectra/MatOp/internal/ArnoldiOp.h"
  #include "/usr/include/Spectra/MatOp/internal/SymGEigsBucklingOp.h"
  #include "/usr/include/Spectra/MatOp/internal/SymGEigsCayleyOp.h"
  #include "/usr/include/Spectra/MatOp/internal/SymGEigsCholeskyOp.h"
  #include "/usr/include/Spectra/MatOp/internal/SymGEigsRegInvOp.h"
  #include "/usr/include/Spectra/MatOp/internal/SymGEigsShiftInvertOp.h"
  #include "/usr/include/Spectra/SymEigsBase.h"
  #include "/usr/include/Spectra/SymEigsShiftSolver.h"
  #include "/usr/include/Spectra/SymEigsSolver.h"
  #include "/usr/include/Spectra/SymGEigsShiftSolver.h"
  #include "/usr/include/Spectra/SymGEigsSolver.h"
  #include "/usr/include/Spectra/Util/CompInfo.h"
  #include "/usr/include/Spectra/Util/GEigsMode.h"
  #include "/usr/include/Spectra/Util/SelectionRule.h"
  #include "/usr/include/Spectra/Util/SimpleRandom.h"
  #include "/usr/include/Spectra/Util/TypeTraits.h"
  #include "/usr/include/Spectra/Util/Version.h"
  #include "/usr/include/Spectra/contrib/LOBPCGSolver.h"
  #include "/usr/include/Spectra/contrib/PartialSVDSolver.h"

  // add namespaces
  namespace Eigen{typedef int tmp_add_type_1;}
  Eigen::tmp_add_type_1 tmp_add_func_1(){return 0;};
  namespace Eigen{namespace Architecture{typedef int tmp_add_type_2;}}
  Eigen::Architecture::tmp_add_type_2 tmp_add_func_2(){return 0;};
  namespace Eigen{namespace indexing{typedef int tmp_add_type_3;}}
  Eigen::indexing::tmp_add_type_3 tmp_add_func_3(){return 0;};
  namespace Eigen{namespace internal{typedef int tmp_add_type_4;}}
  Eigen::internal::tmp_add_type_4 tmp_add_func_4(){return 0;};
  namespace Eigen{namespace internal{namespace Colamd{typedef int tmp_add_type_5;}}}
  Eigen::internal::Colamd::tmp_add_type_5 tmp_add_func_5(){return 0;};
  namespace Eigen{namespace numext{typedef int tmp_add_type_6;}}
  Eigen::numext::tmp_add_type_6 tmp_add_func_6(){return 0;};
  namespace Eigen{namespace placeholders{typedef int tmp_add_type_7;}}
  Eigen::placeholders::tmp_add_type_7 tmp_add_func_7(){return 0;};
  namespace Eigen{namespace symbolic{typedef int tmp_add_type_8;}}
  Eigen::symbolic::tmp_add_type_8 tmp_add_func_8(){return 0;};
  namespace Spectra{typedef int tmp_add_type_9;}
  Spectra::tmp_add_type_9 tmp_add_func_9(){return 0;};
  namespace Eigen{namespace bfloat16_impl{typedef int tmp_add_type_10;}}
  Eigen::bfloat16_impl::tmp_add_type_10 tmp_add_func_10(){return 0;};
  namespace Eigen{namespace half_impl{typedef int tmp_add_type_11;}}
  Eigen::half_impl::tmp_add_type_11 tmp_add_func_11(){return 0;};
  namespace Eigen{namespace internal{namespace std_fallback{typedef int tmp_add_type_12;}}}
  Eigen::internal::std_fallback::tmp_add_type_12 tmp_add_func_12(){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/d3cd8yLea9/dump1.h"  -I/usr/include/eigen3 -I/usr/include/eigen3/Eigen/src/Core/arch/HIP/hcc