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-rw-r--r--src/ghdldrv/ghdldrv.adb5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/ghdldrv/ghdldrv.adb b/src/ghdldrv/ghdldrv.adb
index b68c46850..31d4a530b 100644
--- a/src/ghdldrv/ghdldrv.adb
+++ b/src/ghdldrv/ghdldrv.adb
@@ -677,6 +677,11 @@ package body Ghdldrv is
Add_Argument (Compiler_Args, new String'(Opt));
end if;
Res := Option_Ok;
+ elsif Opt'Length > 18
+ and then Opt (1 .. 18) = "--time-resolution="
+ then
+ Error ("option --time-resolution not supported by back-end");
+ raise Option_Error;
elsif Opt'Length >= 2
and then (Opt (2) = 'O' or Opt (2) = 'f')
then