--- a/modules/Internals/SysFiles.pm	
+++ a/modules/Internals/SysFiles.pm	
@@ -1,7 +1,7 @@ 
 ###########################################################################
 # A module to find system files and automatically generate include paths
 #
-# Copyright (C) 2015-2017 Andrey Ponomarenko's ABI Laboratory
+# Copyright (C) 2015-2018 Andrey Ponomarenko's ABI Laboratory
 #
 # Written by Andrey Ponomarenko
 #
@@ -31,7 +31,7 @@ my %BinUtils = map {$_=>1} (
 );
 
 # Header file extensions as described by gcc
-my $HEADER_EXT = "h|hh|hp|hxx|hpp|h\\+\\+";
+my $HEADER_EXT = "h|hh|hp|hxx|hpp|h\\+\\+|tcc|txx|x|inl|inc|ads|isph";
 
 my %GlibcHeader = map {$_=>1} (
     "aliases.h",
@@ -760,11 +760,13 @@ sub detectDefaultPaths($$$$)
             printMsg("INFO", "Using GCC $GccVer ($Target, target: ".getArch_GCC(1).")");
             
             # check GCC version
-            if($GccVer=~/\A4\.8(|\.[012])|6\..*|7\..*\Z/)
+            if($GccVer=~/\A(4\.8(|\.[012])|[67]\..*)\Z/ or cmpVersions($GccVer, "8")>=0)
             { # GCC 4.8.[0-2]: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57850
               # GCC 6.[1-2].0: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78040
               # GCC 7.1: still the same issue ...
-                printMsg("WARNING", "May not work properly with GCC 4.8.[0-2], 6.* and higher due to bug #78040 in GCC. Please try other GCC versions with the help of --gcc-path=PATH option or try creating ABI dumps by ABI Dumper tool instead.");
+              # GCC 8: still the same issue ...
+              # ABICC 2.3: enable this for all future GCC versions
+                printMsg("WARNING", "May not work properly with GCC 4.8.[0-2], 6.* and higher due to bug #78040 in GCC. Please try other GCC versions with the help of --gcc-path=PATH option or create ABI dumps by ABI Dumper tool instead to avoid using GCC. Test selected GCC version first by -test option.");
                 $In::Opt{"GccMissedMangling"} = 1;
             }
         }
--- a/modules/Internals/TUDump.pm	
+++ a/modules/Internals/TUDump.pm	
@@ -1,7 +1,7 @@ 
 ###########################################################################
 # A module to create AST dump
 #
-# Copyright (C) 2015-2016 Andrey Ponomarenko's ABI Laboratory
+# Copyright (C) 2015-2018 Andrey Ponomarenko's ABI Laboratory
 #
 # Written by Andrey Ponomarenko
 #
@@ -282,9 +282,17 @@ sub createTUDump($)
         $HeaderPath = $PrePath;
     }
     
+    my $GCC_8 = checkGcc("8"); # support for GCC 8 and new options
+    
     if($In::ABI{$LVer}{"Language"} eq "C++")
     { # add classes and namespaces to the dump
-        my $CHdump = "-fdump-class-hierarchy -c";
+        my $CHdump = "-fdump-class-hierarchy";
+        if($GCC_8)
+        { # -fdump-lang-class instead of -fdump-class-hierarchy
+            $CHdump = "-fdump-lang-class";
+        }
+        $CHdump .= " -c";
+        
         if($In::Desc{$LVer}{"CppMode"}==1
         or $MinGWMode{$LVer}==1) {
             $CHdump .= " -fpreprocessed";
@@ -388,8 +396,14 @@ sub createTUDump($)
         }
     }
     writeLog($LVer, "Temporary header file \'$TmpHeaderPath\' with the following content will be compiled to create GCC translation unit dump:\n".readFile($TmpHeaderPath)."\n");
+    
     # create TU dump
-    my $TUdump = "-fdump-translation-unit -fkeep-inline-functions -c";
+    my $TUdump = "-fdump-translation-unit";
+    if ($GCC_8)
+    { # -fdump-lang-raw instead of -fdump-translation-unit
+        $TUdump = "-fdump-lang-raw";
+    }
+    $TUdump .= " -fkeep-inline-functions -c";
     if($In::Opt{"UserLang"} eq "C") {
         $TUdump .= " -U__cplusplus -D_Bool=\"bool\"";
     }
@@ -458,8 +472,15 @@ sub createTUDump($)
     
     unlink($TmpHeaderPath);
     unlink($HeaderPath);
-    
-    if(my @TUs = cmdFind($TmpDir,"f","*.tu",1)) {
+
+    my $dumpExt;
+    if ($GCC_8) {
+        $dumpExt = "*.raw";
+    }
+    else {
+        $dumpExt = "*.tu";
+    }
+    if(my @TUs = cmdFind($TmpDir,"f",$dumpExt,1)) {
         return $TUs[0];
     }
     else