Temporary header file '/tmp/u_zgg93HsH/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/volume_key/libvolume_key.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/u_zgg93HsH/dump1.h"

In file included from /tmp/u_zgg93HsH/dump1.h:11:
/usr/include/volume_key/libvolume_key.h:21:10: fatal error: cert.h: No such file or directory
   21 | #include <cert.h>
      |          ^~~~~~~~
compilation terminated.