Temporary header file '/tmp/nqwpDJm9z2/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/Cauchy/Config.h"
  #include "/usr/include/Cauchy/Eigen3/Complex.h"
  #include "/usr/include/Cauchy/Eigen3/ComplexOperators.h"
  #include "/usr/include/Cauchy/Eigen3/Cond.h"
  #include "/usr/include/Cauchy/Eigen3/Display.h"
  #include "/usr/include/Cauchy/Eigen3/Eig.h"
  #include "/usr/include/Cauchy/Eigen3/FEval.h"
  #include "/usr/include/Cauchy/Eigen3/FFT.h"
  #include "/usr/include/Cauchy/Eigen3/Infinity.h"
  #include "/usr/include/Cauchy/Eigen3/Inv.h"
  #include "/usr/include/Cauchy/Eigen3/LU.h"
  #include "/usr/include/Cauchy/Eigen3/Math.h"
  #include "/usr/include/Cauchy/Eigen3/Matrix.h"
  #include "/usr/include/Cauchy/Eigen3/MatrixIterator.h"
  #include "/usr/include/Cauchy/Eigen3/MatrixOperators.h"
  #include "/usr/include/Cauchy/Eigen3/Norm.h"
  #include "/usr/include/Cauchy/Eigen3/NumberTypes.h"
  #include "/usr/include/Cauchy/Eigen3/Octave.h"
  #include "/usr/include/Cauchy/Eigen3/Quad.h"
  #include "/usr/include/Cauchy/Eigen3/Range.h"
  #include "/usr/include/Cauchy/Eigen3/RangeIterator.h"
  #include "/usr/include/Cauchy/Eigen3/SVD.h"
  #include "/usr/include/Cauchy/Eigen3/Sort.h"
  #include "/usr/include/Cauchy/Eigen3/System.h"
  #include "/usr/include/Cauchy/Eigen3/Time.h"
  #include "/usr/include/Cauchy/Eigen3/Unknown.h"
  #include "/usr/include/Cauchy/Eigen3.h"
  #include "/usr/include/m2mml.h"

  // add namespaces
  namespace Cauchy{typedef int tmp_add_type_1;}
  Cauchy::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/nqwpDJm9z2/dump1.h"

In file included from /tmp/nqwpDJm9z2/dump1.h:11:
/usr/include/Cauchy/Config.h:84:4: error: #error "Unknown architecture"
   84 | #  error "Unknown architecture"
      |    ^~~~~
In file included from /tmp/nqwpDJm9z2/dump1.h:14:
/usr/include/Cauchy/Eigen3/Cond.h:26:10: fatal error: Eigen/SVD: No such file or directory
   26 | #include <Eigen/SVD>
      |          ^~~~~~~~~~~
compilation terminated.