diff --git a/ide/packages/ideconfig/compileroptions.pp b/ide/packages/ideconfig/compileroptions.pp
index ced7441c74..18bc490fb5 100644
--- a/ide/packages/ideconfig/compileroptions.pp
+++ b/ide/packages/ideconfig/compileroptions.pp
@@ -154,6 +154,18 @@ type
     );
   TCompilerCmdLineOptions = set of TCompilerCmdLineOption;
 
+const
+  CompilerCmdLineOptionNames: array[TCompilerCmdLineOption] of string = (
+    'NoLinkerOpts',
+    'AddVerboseAll',
+    'DoNotAppendOutFileOption',
+    'AbsolutePaths',
+    'NoMacroParams',
+    'AddCompilerPath'
+  );
+
+type
+
   { TCompilationToolOptions }
 
   TCompilationToolOptions = class(TLazCompilationToolOptions)
@@ -221,7 +233,7 @@ type
     function GetEnumerator: TCompilerMsgIDFlagsEnumerator;
     function GetMsgIdList(Delim: char; aValue: TCompilerFlagValue; FPCMsgFile: TFPCMsgFilePoolItem = nil): string;
     function CreateDiff(Tool: TCompilerDiffTool; Other: TCompilerMsgIDFlags): boolean;
-    function Count: SizeInt; inline;
+    function Count: SizeInt;
     property ChangeStamp: int64 read FChangeStamp;
   end;
 
@@ -428,6 +440,8 @@ procedure SaveXMLCompileReasons(const AConfig: TXMLConfig; const APath: String;
 function EnumToStr(Flag: TCompilerFlagValue): string; overload;
 function CompareCompMsgIdFlag(Data1, Data2: Pointer): integer;
 
+function dbgs(const Opts: TCompilerCmdLineOptions): string; overload;
+
 var
   TestCompilerOptions: TNotifyEvent = nil;
 
@@ -757,6 +771,19 @@ begin
     Result:=0;
 end;
 
+function dbgs(const Opts: TCompilerCmdLineOptions): string;
+var
+  o: TCompilerCmdLineOption;
+begin
+  Result:='';
+  for o in Opts do
+  begin
+    if Result<>'' then Result+=',';
+    Result+=CompilerCmdLineOptionNames[o];
+  end;
+  Result:='['+Result+']';
+end;
+
 { TCompilerMsgIDFlagsEnumerator }
 
 function TCompilerMsgIDFlagsEnumerator.GetCurrent: PCompilerMsgIdFlag;
@@ -2663,7 +2690,7 @@ begin
   CurMainSrcFile:=GetDefaultMainSourceFileName;
   CurTargetFilename:='';
   CurTargetDirectory:='';
-  //DebugLn(['TBaseCompilerOptions.MakeOptionsString ',DbgSName(Self),' ',ccloDoNotAppendOutFileOption in Flags,' TargetFilename="',TargetFilename,'" CurMainSrcFile="',CurMainSrcFile,'" CurOutputDir="',CurOutputDir,'"']);
+  DebugLn(['TBaseCompilerOptions.MakeOptionsString ',DbgSName(Self),' ',dbgs(Flags),' TargetFilename="',TargetFilename,'" CurMainSrcFile="',CurMainSrcFile,'" CurOutputDir="',CurOutputDir,'"']);
   if (not (ccloDoNotAppendOutFileOption in Flags))
     and (not (ccloNoMacroParams in Flags))
     and ((TargetFilename<>'') or (CurMainSrcFile<>'') or (CurOutputDir<>'')) then
diff --git a/ide/showcompileropts.pas b/ide/showcompileropts.pas
index ec2e9b32af..e22dac90f1 100644
--- a/ide/showcompileropts.pas
+++ b/ide/showcompileropts.pas
@@ -295,28 +295,20 @@ end;
 procedure TShowCompilerOptionsDlg.UpdateMemo;
 var
   Flags: TCompilerCmdLineOptions;
-  CompPath: String;
   CompOptions: TStringListUTF8Fast;
 begin
   if CompilerOpts=nil then exit;
 
   // set flags
   Flags:=CompilerOpts.DefaultMakeOptionsFlags;
-  Include(Flags, ccloAddCompilerPath);
+  Include(Flags,ccloAddCompilerPath);
   if not RelativePathsCheckBox.Checked then
     Include(Flags,ccloAbsolutePaths);
 
   // get command line parameters (include compiler path)
   CompOptions := CompilerOpts.MakeCompilerParams(Flags);
   try
-    // add the main project unit after the compiler path
-    if (Project1<>nil) and (Project1.MainUnitInfo<>nil) and (CompOptions.Count>0) then
-    begin
-      if RelativePathsCheckBox.Checked then
-        CompOptions.Insert(1, Project1.MainUnitInfo.ShortFilename)
-      else
-        CompOptions.Insert(1, Project1.MainUnitInfo.GetFullFilename);
-    end;
+    CompOptions.Add(CompilerOpts.CreateTargetFilename);
 
     // show
     FillMemo(CmdLineMemo,CompOptions);