Temporary header file '/tmp/1GJUMh4ONk/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/jpegtcl.h"
  #include "/usr/include/jpegtclDecls.h"
  #include "/usr/include/pngtcl.h"
  #include "/usr/include/pngtclDecls.h"
  #include "/usr/include/tifftcl.h"
  #include "/usr/include/tifftclDecls.h"
  #include "/usr/include/tkimg.h"
  #include "/usr/include/tkimgDecls.h"
  #include "/usr/include/zlibtcl.h"
  #include "/usr/include/zlibtclDecls.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/1GJUMh4ONk/dump1.h"  -I/usr/include/tcl8.6

In file included from /usr/include/jpegtcl.h:51,
                 from /tmp/1GJUMh4ONk/dump1.h:12:
/usr/include/jpegtclDecls.h:33:10: fatal error: /usr/include/jpeglib.h: No such file or directory
   33 | #include "/usr/include/jpeglib.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.