From 0ceb8e60f8f4fa6772a3e9e95c766c2027bfd864 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Wed, 22 Dec 2021 16:11:54 -0700
Subject: [PATCH] define_corners after read_liberty error

Signed-off-by: James Cherry <cherry@parallaxsw.com>
---
 tcl/Sdc.tcl | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tcl/Sdc.tcl b/tcl/Sdc.tcl
index bd05ed44..b8f950a1 100644
--- a/tcl/Sdc.tcl
+++ b/tcl/Sdc.tcl
@@ -3159,6 +3159,9 @@ proc set_max_leakage_power { power {unit {}} } {
 define_cmd_args "define_corners" { corner1 [corner2]... }
 
 proc define_corners { args } {
+  if { [get_libs -quiet *] != {} } {
+    sta_error 373 "define_corners must be called before read_liberty."
+  }
   define_corners_cmd $args
 }