diff --git a/src/ca65/error.c b/src/ca65/error.c
index 69446b3fc..7e1457964 100644
--- a/src/ca65/error.c
+++ b/src/ca65/error.c
@@ -84,7 +84,7 @@ static void VPrintMsg (const FilePos* Pos, const char* Desc,
     SB_Terminate (&Msg);
 
     /* Format the message header */
-    SB_Printf (&S, "%s(%u): %s: ",
+    SB_Printf (&S, "%s:%u: %s: ",
                SB_GetConstBuf (GetFileName (Pos->Name)),
                Pos->Line,
                Desc);
diff --git a/src/cc65/error.c b/src/cc65/error.c
index b1529d0b5..f0e023969 100644
--- a/src/cc65/error.c
+++ b/src/cc65/error.c
@@ -129,7 +129,7 @@ void Fatal (const char* Format, ...)
         LineNum  = GetCurrentLine ();
     }
 
-    fprintf (stderr, "%s(%u): Fatal: ", FileName, LineNum);
+    fprintf (stderr, "%s:%u: Fatal: ", FileName, LineNum);
 
     va_start (ap, Format);
     vfprintf (stderr, Format, ap);
@@ -159,7 +159,7 @@ void Internal (const char* Format, ...)
         LineNum  = GetCurrentLine ();
     }
 
-    fprintf (stderr, "%s(%u): Internal compiler error:\n",
+    fprintf (stderr, "%s:%u: Internal compiler error:\n",
              FileName, LineNum);
 
     va_start (ap, Format);
@@ -186,7 +186,7 @@ void Internal (const char* Format, ...)
 static void IntError (const char* Filename, unsigned LineNo, const char* Msg, va_list ap)
 /* Print an error message - internal function*/
 {
-    fprintf (stderr, "%s(%u): Error: ", Filename, LineNo);
+    fprintf (stderr, "%s:%u: Error: ", Filename, LineNo);
     vfprintf (stderr, Msg, ap);
     fprintf (stderr, "\n");
 
@@ -250,7 +250,7 @@ static void IntWarning (const char* Filename, unsigned LineNo, const char* Msg,
 
     } else if (IS_Get (&WarnEnable)) {
 
-        fprintf (stderr, "%s(%u): Warning: ", Filename, LineNo);
+        fprintf (stderr, "%s:%u: Warning: ", Filename, LineNo);
         vfprintf (stderr, Msg, ap);
         fprintf (stderr, "\n");
 
diff --git a/src/cc65/pragma.c b/src/cc65/pragma.c
index e4bb4cdeb..b0478ce2a 100644
--- a/src/cc65/pragma.c
+++ b/src/cc65/pragma.c
@@ -784,7 +784,7 @@ static void IntPragma (StrBuf* B, IntStack* Stack, long Low, long High)
 
 static void MakeMessage (const char* Message)
 {
-    fprintf (stderr, "%s(%u): Note: %s\n", GetInputName (CurTok.LI), GetInputLine (CurTok.LI), Message);
+    fprintf (stderr, "%s:%u: Note: %s\n", GetInputName (CurTok.LI), GetInputLine (CurTok.LI), Message);
 }
 
 
diff --git a/src/cc65/preproc.c b/src/cc65/preproc.c
index cc160c1c3..37073e784 100644
--- a/src/cc65/preproc.c
+++ b/src/cc65/preproc.c
@@ -1396,7 +1396,7 @@ void Preprocess (void)
 
 Done:
     if (Verbosity > 1 && SB_NotEmpty (Line)) {
-        printf ("%s(%u): %.*s\n", GetCurrentFile (), GetCurrentLine (),
+        printf ("%s:%u: %.*s\n", GetCurrentFile (), GetCurrentLine (),
                 (int) SB_GetLen (Line), SB_GetConstBuf (Line));
     }
 }
diff --git a/src/da65/asminc.c b/src/da65/asminc.c
index 59ba0aab4..4d9da2594 100644
--- a/src/da65/asminc.c
+++ b/src/da65/asminc.c
@@ -133,7 +133,7 @@ void AsmInc (const char* Filename, char CommentStart, int IgnoreUnknown)
             SB_Terminate (&Ident);
         } else {
             if (!IgnoreUnknown) {
-                Error ("%s(%u): Syntax error", Filename, Line);
+                Error ("%s:%u: Syntax error", Filename, Line);
             }
             continue;
         }
@@ -148,7 +148,7 @@ void AsmInc (const char* Filename, char CommentStart, int IgnoreUnknown)
             ++L;
         } else {
             if (!IgnoreUnknown) {
-                Error ("%s(%u): Missing '='", Filename, Line);
+                Error ("%s:%u: Missing '='", Filename, Line);
             }
             continue;
         }
@@ -192,7 +192,7 @@ void AsmInc (const char* Filename, char CommentStart, int IgnoreUnknown)
         /* Must have at least one digit */
         if (Digits == 0) {
             if (!IgnoreUnknown) {
-                Error ("%s(%u): Error in number format", Filename, Line);
+                Error ("%s:%u: Error in number format", Filename, Line);
             }
             continue;
         }
@@ -213,7 +213,7 @@ void AsmInc (const char* Filename, char CommentStart, int IgnoreUnknown)
         /* Check for a comment character or end of line */
         if (*L != CommentStart && *L != '\0') {
             if (!IgnoreUnknown) {
-                Error ("%s(%u): Trailing garbage", Filename, Line);
+                Error ("%s:%u: Trailing garbage", Filename, Line);
             }
             continue;
         }
diff --git a/src/da65/scanner.c b/src/da65/scanner.c
index 85853d6c4..33fb3a826 100644
--- a/src/da65/scanner.c
+++ b/src/da65/scanner.c
@@ -94,7 +94,7 @@ void InfoWarning (const char* Format, ...)
     xvsprintf (Buf, sizeof (Buf), Format, ap);
     va_end (ap);
 
-    fprintf (stderr, "%s(%u): Warning: %s\n",
+    fprintf (stderr, "%s:%u: Warning: %s\n",
             InputSrcName, InfoErrorLine, Buf);
 }
 
@@ -110,7 +110,7 @@ void InfoError (const char* Format, ...)
     xvsprintf (Buf, sizeof (Buf), Format, ap);
     va_end (ap);
 
-    fprintf (stderr, "%s(%u): Error: %s\n",
+    fprintf (stderr, "%s:%u: Error: %s\n",
             InputSrcName, InfoErrorLine, Buf);
     exit (EXIT_FAILURE);
 }
diff --git a/src/ld65/asserts.c b/src/ld65/asserts.c
index 626ed94a6..e9bae83e5 100644
--- a/src/ld65/asserts.c
+++ b/src/ld65/asserts.c
@@ -140,12 +140,12 @@ void CheckAssertions (void)
 
                 case ASSERT_ACT_WARN:
                 case ASSERT_ACT_LDWARN:
-                    Warning ("%s(%u): %s", Module, Line, Message);
+                    Warning ("%s:%u: %s", Module, Line, Message);
                     break;
 
                 case ASSERT_ACT_ERROR:
                 case ASSERT_ACT_LDERROR:
-                    Error ("%s(%u): %s", Module, Line, Message);
+                    Error ("%s:%u: %s", Module, Line, Message);
                     break;
 
                 default:
diff --git a/src/ld65/exports.c b/src/ld65/exports.c
index 5df7a37c9..872db5143 100644
--- a/src/ld65/exports.c
+++ b/src/ld65/exports.c
@@ -774,17 +774,19 @@ static void PrintUnresolved (ExpCheckFunc F, void* Data)
         if (E->Expr == 0 && E->ImpCount > 0 && F (E->Name, Data) == 0) {
             /* Unresolved external */
             Import* Imp = E->ImpList;
+            const char * name = GetString (E->Name);
             fprintf (stderr,
                      "Unresolved external '%s' referenced in:\n",
-                     GetString (E->Name));
+                     name);
             while (Imp) {
                 unsigned J;
                 for (J = 0; J < CollCount (&Imp->RefLines); ++J) {
                     const LineInfo* LI = CollConstAt (&Imp->RefLines, J);
                     fprintf (stderr,
-                         "  %s(%u)\n",
+                         "  %s:%u: Error: Unresolved external '%s'\n",
                          GetSourceName (LI),
-                         GetSourceLine (LI));
+                         GetSourceLine (LI),
+                         name);
                 }
                 Imp = Imp->Next;
             }
diff --git a/src/ld65/scanner.c b/src/ld65/scanner.c
index d6278abbd..256d47f07 100644
--- a/src/ld65/scanner.c
+++ b/src/ld65/scanner.c
@@ -92,7 +92,7 @@ void CfgWarning (const FilePos* Pos, const char* Format, ...)
     SB_VPrintf (&Buf, Format, ap);
     va_end (ap);
 
-    Warning ("%s(%u): %s",
+    Warning ("%s:%u: %s",
              GetString (Pos->Name), Pos->Line, SB_GetConstBuf (&Buf));
     SB_Done (&Buf);
 }
@@ -109,7 +109,7 @@ void CfgError (const FilePos* Pos, const char* Format, ...)
     SB_VPrintf (&Buf, Format, ap);
     va_end (ap);
 
-    Error ("%s(%u): %s",
+    Error ("%s:%u: %s",
            GetString (Pos->Name), Pos->Line, SB_GetConstBuf (&Buf));
     SB_Done (&Buf);
 }