Temporary header file '/tmp/VqUMjcs8lb/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _TIME_BITS 64
#define _FILE_OFFSET_BITS 64
#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/znc/Buffer.h"
  #include "/usr/include/znc/Chan.h"
  #include "/usr/include/znc/Client.h"
  #include "/usr/include/znc/Config.h"
  #include "/usr/include/znc/Csocket.h"
  #include "/usr/include/znc/ExecSock.h"
  #include "/usr/include/znc/FileUtils.h"
  #include "/usr/include/znc/HTTPSock.h"
  #include "/usr/include/znc/IRCNetwork.h"
  #include "/usr/include/znc/IRCSock.h"
  #include "/usr/include/znc/Listener.h"
  #include "/usr/include/znc/MD5.h"
  #include "/usr/include/znc/Message.h"
  #include "/usr/include/znc/Modules.h"
  #include "/usr/include/znc/Nick.h"
  #include "/usr/include/znc/Query.h"
  #include "/usr/include/znc/SHA256.h"
  #include "/usr/include/znc/SSLVerifyHost.h"
  #include "/usr/include/znc/Server.h"
  #include "/usr/include/znc/Socket.h"
  #include "/usr/include/znc/Template.h"
  #include "/usr/include/znc/Threads.h"
  #include "/usr/include/znc/Translation.h"
  #include "/usr/include/znc/User.h"
  #include "/usr/include/znc/Utils.h"
  #include "/usr/include/znc/WebModules.h"
  #include "/usr/include/znc/ZNCDebug.h"
  #include "/usr/include/znc/ZNCString.h"
  #include "/usr/include/znc/defines.h"
  #include "/usr/include/znc/main.h"
  #include "/usr/include/znc/version.h"
  #include "/usr/include/znc/znc.h"
  #include "/usr/include/znc/znc_export_lib_export.h"
  #include "/usr/include/znc/zncconfig.h"

  // add namespaces
  namespace icu_72{typedef int tmp_add_type_1;}
  icu_72::tmp_add_type_1 tmp_add_func_1(){return 0;};

  // add classes
  ASN1_ENCODING_st* tmp_add_class_0;
  BIO_sock_info_u* tmp_add_class_1;
  BIT_STRING_BITNAME_st* tmp_add_class_2;
  CActionMessage* tmp_add_class_3;
  CAuthBase* tmp_add_class_4;
  CBlowfish* tmp_add_class_5;
  CBufLine* tmp_add_class_6;
  CBuffer* tmp_add_class_7;
  CCTCPMessage* tmp_add_class_8;
  CChan* tmp_add_class_9;
  CClient* tmp_add_class_10;
  CClientAuth* tmp_add_class_11;
  CConfig* tmp_add_class_12;
  CConfigEntry* tmp_add_class_13;
  CCoreTranslationMixin* tmp_add_class_14;
  CCron* tmp_add_class_15;
  CDebug* tmp_add_class_16;
  CDebugStream* tmp_add_class_17;
  CDelayedTranslation* tmp_add_class_18;
  CDir* tmp_add_class_19;
  CException* tmp_add_class_20;
  CExecSock* tmp_add_class_21;
  CFPTimer* tmp_add_class_22;
  CFile* tmp_add_class_23;
  CGetAddrInfo* tmp_add_class_24;
  CHTTPSock* tmp_add_class_25;
  CIRCNetwork* tmp_add_class_26;
  CIRCSock* tmp_add_class_27;
  CIRCSocket* tmp_add_class_28;
  CIncomingConnection* tmp_add_class_29;
  CInlineFormatMessage* tmp_add_class_30;
  CJob* tmp_add_class_31;
  CJoinMessage* tmp_add_class_32;
  CKickMessage* tmp_add_class_33;
  CLanguageScope* tmp_add_class_34;
  CListener* tmp_add_class_35;
  CMD5* tmp_add_class_36;
  CMessage* tmp_add_class_37;
  CModCommand* tmp_add_class_38;
  CModInfo* tmp_add_class_39;
  CModeMessage* tmp_add_class_40;
  CModule* tmp_add_class_41;
  CModuleEntry* tmp_add_class_42;
  CModuleJob* tmp_add_class_43;
  CModules* tmp_add_class_44;
  CNick* tmp_add_class_45;
  CNickMessage* tmp_add_class_46;
  CNoticeMessage* tmp_add_class_47;
  CNumericMessage* tmp_add_class_48;
  COptionalTranslation* tmp_add_class_49;
  CPartMessage* tmp_add_class_50;
  CQuery* tmp_add_class_51;
  CQuitMessage* tmp_add_class_52;
  CRealListener* tmp_add_class_53;
  CSCharBuffer* tmp_add_class_54;
  CSConnection* tmp_add_class_55;
  CSListener* tmp_add_class_56;
  CSMonitorFD* tmp_add_class_57;
  CSSSLConnection* tmp_add_class_58;
  CSSSListener* tmp_add_class_59;
  CSSockAddr* tmp_add_class_60;
  CServer* tmp_add_class_61;
  CSockCommon* tmp_add_class_62;
  CSockManager* tmp_add_class_63;
  CSocket* tmp_add_class_64;
  CSocketManager* tmp_add_class_65;
  CString* tmp_add_class_66;
  CTable* tmp_add_class_67;
  CTargetMessage* tmp_add_class_68;
  CTemplate* tmp_add_class_69;
  CTemplateLoopContext* tmp_add_class_70;
  CTemplateOptions* tmp_add_class_71;
  CTemplateTagHandler* tmp_add_class_72;
  CTextMessage* tmp_add_class_73;
  CThreadPool* tmp_add_class_74;
  CTimer* tmp_add_class_75;
  CTopicMessage* tmp_add_class_76;
  CTranslation* tmp_add_class_77;
  CTranslationDomainRefHolder* tmp_add_class_78;
  CTranslationInfo* tmp_add_class_79;
  CUser* tmp_add_class_80;
  CUtils* tmp_add_class_81;
  CWebSession* tmp_add_class_82;
  CWebSessionMap* tmp_add_class_83;
  CWebSock* tmp_add_class_84;
  CWebSubPage* tmp_add_class_85;
  CZNC* tmp_add_class_86;
  CZNCSock* tmp_add_class_87;
  CZNCTagHandler* tmp_add_class_88;
  Csock* tmp_add_class_89;
  ERR_string_data_st* tmp_add_class_90;
  MCString* tmp_add_class_91;
  MD5state_st* tmp_add_class_92;
  Netscape_certificate_sequence* tmp_add_class_93;
  Netscape_spkac_st* tmp_add_class_94;
  Netscape_spki_st* tmp_add_class_95;
  PBE2PARAM_st* tmp_add_class_96;
  PBEPARAM_st* tmp_add_class_97;
  PBKDF2PARAM_st* tmp_add_class_98;
  PKCS7_CTX_st* tmp_add_class_99;
  SCRYPT_PARAMS_st* tmp_add_class_100;
  SHA256state_st* tmp_add_class_101;
  SHA512state_st* tmp_add_class_102;
  SHAstate_st* tmp_add_class_103;
  X509_algor_st* tmp_add_class_104;
  X509_info_st* tmp_add_class_105;
  X509_val_st* tmp_add_class_106;
  _G_fpos64_t* tmp_add_class_107;
  _G_fpos_t* tmp_add_class_108;
  _IO_cookie_io_functions_t* tmp_add_class_109;
  addrinfo* tmp_add_class_110;
  aes_key_st* tmp_add_class_111;
  asn1_string_st* tmp_add_class_112;
  asn1_string_table_st* tmp_add_class_113;
  asn1_type_st* tmp_add_class_114;
  bf_key_st* tmp_add_class_115;
  buf_mem_st* tmp_add_class_116;
  cmsghdr* tmp_add_class_117;
  conf_method_st* tmp_add_class_118;
  conf_st* tmp_add_class_119;
  crypto_ex_data_st* tmp_add_class_120;
  crypto_threadid_st* tmp_add_class_121;
  err_state_st* tmp_add_class_122;
  evp_cipher_info_st* tmp_add_class_123;
  f_owner_ex* tmp_add_class_124;
  file_handle* tmp_add_class_125;
  flock64* tmp_add_class_126;
  gaicb* tmp_add_class_127;
  group_filter* tmp_add_class_128;
  group_req* tmp_add_class_129;
  group_source_req* tmp_add_class_130;
  hostent* tmp_add_class_131;
  in6_addr* tmp_add_class_132;
  in6_pktinfo* tmp_add_class_133;
  in_addr* tmp_add_class_134;
  in_pktinfo* tmp_add_class_135;
  iovec* tmp_add_class_136;
  ip6_mtuinfo* tmp_add_class_137;
  ip_mreq* tmp_add_class_138;
  ip_mreq_source* tmp_add_class_139;
  ip_mreqn* tmp_add_class_140;
  ip_msfilter* tmp_add_class_141;
  ip_opts* tmp_add_class_142;
  ipv6_mreq* tmp_add_class_143;
  itimerval* tmp_add_class_144;
  lhash_st_CONF_VALUE* tmp_add_class_145;
  lhash_st_ERR_STRING_DATA* tmp_add_class_146;
  lhash_st_OPENSSL_CSTRING* tmp_add_class_147;
  lhash_st_OPENSSL_STRING* tmp_add_class_148;
  linger* tmp_add_class_149;
  mmsghdr* tmp_add_class_150;
  msghdr* tmp_add_class_151;
  netent* tmp_add_class_152;
  obj_name_st* tmp_add_class_153;
  osockaddr* tmp_add_class_154;
  ossl_algorithm_st* tmp_add_class_155;
  ossl_dispatch_st* tmp_add_class_156;
  ossl_item_st* tmp_add_class_157;
  ossl_param_st* tmp_add_class_158;
  pkcs7_digest_st* tmp_add_class_159;
  pkcs7_enc_content_st* tmp_add_class_160;
  pkcs7_encrypted_st* tmp_add_class_161;
  pkcs7_enveloped_st* tmp_add_class_162;
  pkcs7_issuer_and_serial_st* tmp_add_class_163;
  pkcs7_recip_info_st* tmp_add_class_164;
  pkcs7_signed_st* tmp_add_class_165;
  pkcs7_signedandenveloped_st* tmp_add_class_166;
  pkcs7_signer_info_st* tmp_add_class_167;
  pkcs7_st* tmp_add_class_168;
  pollfd* tmp_add_class_169;
  private_key_st* tmp_add_class_170;
  protoent* tmp_add_class_171;
  rand_meth_st* tmp_add_class_172;
  rpcent* tmp_add_class_173;
  rsa_oaep_params_st* tmp_add_class_174;
  rsa_pss_params_st* tmp_add_class_175;
  servent* tmp_add_class_176;
  sockaddr* tmp_add_class_177;
  sockaddr_in* tmp_add_class_178;
  sockaddr_in6* tmp_add_class_179;
  sockaddr_storage* tmp_add_class_180;
  sockaddr_un* tmp_add_class_181;
  srtp_protection_profile_st* tmp_add_class_182;
  statx_timestamp* tmp_add_class_183;
  termio* tmp_add_class_184;
  tls_session_ticket_ext_st* tmp_add_class_185;
  ucontext_t* tmp_add_class_186;
  ucred* tmp_add_class_187;
  winsize* tmp_add_class_188;
  x509_trust_st* tmp_add_class_189;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/VqUMjcs8lb/dump1.h"