Temporary header file '/tmp/ySEZqL_MUo/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/pd/g_all_guis.h"
  #include "/usr/include/pd/g_canvas.h"
  #include "/usr/include/pd/g_undo.h"
  #include "/usr/include/pd/m_imp.h"
  #include "/usr/include/pd/m_pd.h"
  #include "/usr/include/pd/s_net.h"
  #include "/usr/include/pd/s_stuff.h"
  #include "/usr/include/pd/x_vexp.h"
  #include "/usr/include/m_pd.h"

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

In file included from /tmp/ySEZqL_MUo/dump1.h:19:
/usr/include/pd/x_vexp.h:16:10: fatal error: ext.h: No such file or directory
   16 | #include "ext.h"
      |          ^~~~~~~
compilation terminated.