Temporary header file '/tmp/Nx7Oxf0QuU/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/sopt/bisection_method.h"
  #include "/usr/include/sopt/chained_operators.h"
  #include "/usr/include/sopt/config.h"
  #include "/usr/include/sopt/conjugate_gradient.h"
  #include "/usr/include/sopt/credible_region.h"
  #include "/usr/include/sopt/exception.h"
  #include "/usr/include/sopt/forward_backward.h"
  #include "/usr/include/sopt/imaging_forward_backward.h"
  #include "/usr/include/sopt/imaging_padmm.h"
  #include "/usr/include/sopt/joint_map.h"
  #include "/usr/include/sopt/l1_proximal.h"
  #include "/usr/include/sopt/linear_transform.h"
  #include "/usr/include/sopt/logging.disabled.h"
  #include "/usr/include/sopt/logging.enabled.h"
  #include "/usr/include/sopt/logging.h"
  #include "/usr/include/sopt/maths.h"
  #include "/usr/include/sopt/mpi/communicator.h"
  #include "/usr/include/sopt/mpi/registered_types.h"
  #include "/usr/include/sopt/mpi/session.h"
  #include "/usr/include/sopt/mpi/utilities.h"
  #include "/usr/include/sopt/objective_functions.h"
  #include "/usr/include/sopt/padmm.h"
  #include "/usr/include/sopt/positive_quadrant.h"
  #include "/usr/include/sopt/power_method.h"
  #include "/usr/include/sopt/primal_dual.h"
  #include "/usr/include/sopt/proximal.h"
  #include "/usr/include/sopt/proximal_expression.h"
  #include "/usr/include/sopt/real_type.h"
  #include "/usr/include/sopt/relative_variation.h"
  #include "/usr/include/sopt/reweighted.h"
  #include "/usr/include/sopt/sampling.h"
  #include "/usr/include/sopt/sdmm.h"
  #include "/usr/include/sopt/types.h"
  #include "/usr/include/sopt/utilities.h"
  #include "/usr/include/sopt/wavelets/direct.h"
  #include "/usr/include/sopt/wavelets/indirect.h"
  #include "/usr/include/sopt/wavelets/innards.impl.h"
  #include "/usr/include/sopt/wavelets/sara.h"
  #include "/usr/include/sopt/wavelets/wavelet_data.h"
  #include "/usr/include/sopt/wavelets/wavelets.h"
  #include "/usr/include/sopt/wavelets.h"
  #include "/usr/include/sopt/wrapper.h"

  // add namespaces
  namespace sopt{typedef int tmp_add_type_1;}
  sopt::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/Nx7Oxf0QuU/dump1.h"

In file included from /usr/include/sopt/logging.h:7,
                 from /usr/include/sopt/bisection_method.h:7,
                 from /tmp/Nx7Oxf0QuU/dump1.h:12:
/usr/include/sopt/logging.enabled.h:5:10: fatal error: spdlog/fmt/ostr.h: No such file or directory
    5 | #include <spdlog/fmt/ostr.h>
      |          ^~~~~~~~~~~~~~~~~~~
compilation terminated.