Temporary header file '/tmp/ek2pf4lYkU/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/zdb/Connection.h"
  #include "/usr/include/zdb/ConnectionPool.h"
  #include "/usr/include/zdb/Exception.h"
  #include "/usr/include/zdb/PreparedStatement.h"
  #include "/usr/include/zdb/ResultSet.h"
  #include "/usr/include/zdb/SQLException.h"
  #include "/usr/include/zdb/URL.h"
  #include "/usr/include/zdb/zdb.h"

  // add classes
  Exception_Frame* tmp_add_class_0;
  Exception_T* tmp_add_class_1;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/ek2pf4lYkU/dump1.h"  -I/usr/include/zdb

In file included from /tmp/ek2pf4lYkU/dump1.h:12:
/usr/include/zdb/Connection.h:123:1: error: ‘URL_T’ does not name a type
  123 | URL_T Connection_getURL(T C);
      | ^~~~~
/usr/include/zdb/Connection.h:241:1: error: ‘ResultSet_T’ does not name a type
  241 | ResultSet_T Connection_executeQuery(T C, const char *sql, ...) __attribute__((format (printf, 2, 3)));
      | ^~~~~~~~~~~
/usr/include/zdb/Connection.h:263:1: error: ‘PreparedStatement_T’ does not name a type
  263 | PreparedStatement_T Connection_prepareStatement(T C, const char *sql, ...) __attribute__((format (printf, 2, 3)));
      | ^~~~~~~~~~~~~~~~~~~
In file included from /tmp/ek2pf4lYkU/dump1.h:13:
/usr/include/zdb/ConnectionPool.h:268:22: error: ‘URL_T’ was not declared in this scope
  268 | T ConnectionPool_new(URL_T url);
      |                      ^~~~~
/usr/include/zdb/ConnectionPool.h:286:1: error: ‘URL_T’ does not name a type
  286 | URL_T ConnectionPool_getURL(T P);
      | ^~~~~
In file included from /tmp/ek2pf4lYkU/dump1.h:15:
/usr/include/zdb/PreparedStatement.h:239:1: error: ‘ResultSet_T’ does not name a type
  239 | ResultSet_T PreparedStatement_executeQuery(T P);
      | ^~~~~~~~~~~