Temporary header file '/tmp/uGhdnl7d0c/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/tag/absorient.h"
  #include "/usr/include/tag/array.h"
  #include "/usr/include/tag/constantposition.h"
  #include "/usr/include/tag/constantvelocity.h"
  #include "/usr/include/tag/five_point.h"
  #include "/usr/include/tag/fn.h"
  #include "/usr/include/tag/fourpointpose.h"
  #include "/usr/include/tag/handeye.h"
  #include "/usr/include/tag/helpers.h"
  #include "/usr/include/tag/intersection.h"
  #include "/usr/include/tag/kalmanfilter.h"
  #include "/usr/include/tag/measurements.h"
  #include "/usr/include/tag/printf.h"
  #include "/usr/include/tag/quartic.h"
  #include "/usr/include/tag/ransac.h"
  #include "/usr/include/tag/ransac_estimators.h"
  #include "/usr/include/tag/stdpp.h"
  #include "/usr/include/tag/threepointpose.h"
  #include "/usr/include/tag/tuple.h"
  #include "/usr/include/tag/unscented.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/uGhdnl7d0c/dump1.h"

In file included from /tmp/uGhdnl7d0c/dump1.h:12:
/usr/include/tag/absorient.h:13:10: fatal error: TooN/TooN.h: No such file or directory
   13 | #include <TooN/TooN.h>
      |          ^~~~~~~~~~~~~
compilation terminated.

