variables: cleanup, fix errors

Signed-off-by: Øyvind Harboe <[email protected]>

Author: oharboe

flow/scripts/global_place.tcl

@@ -39,7 +39,7 @@ proc do_placement {global_placement_args} {
     -pad_right $::env(CELL_PAD_IN_SITES_GLOBAL_PLACEMENT)] \
     $global_placement_args]
 
-  lappend all_args {*}$::env(GLOBAL_PLACEMENT_ARGS)
+  lappend all_args {*}[env_var_or_empty GLOBAL_PLACEMENT_ARGS]
 
   log_cmd global_placement {*}$all_args
 }

flow/scripts/global_place_skip_io.tcl

@@ -8,7 +8,7 @@ if { [env_var_exists_and_non_empty FLOORPLAN_DEF] } {
   log_cmd global_placement -skip_io -density [place_density_with_lb_addon] \
       -pad_left $::env(CELL_PAD_IN_SITES_GLOBAL_PLACEMENT) \
       -pad_right $::env(CELL_PAD_IN_SITES_GLOBAL_PLACEMENT) \
-      {*}$::env(GLOBAL_PLACEMENT_ARGS)
+      {*}[env_var_or_empty GLOBAL_PLACEMENT_ARGS]
 }
 
 write_db $::env(RESULTS_DIR)/3_1_place_gp_skip_io.odb

flow/scripts/io_placement.tcl

@@ -8,7 +8,7 @@ if {![env_var_exists_and_non_empty FLOORPLAN_DEF] && \
   log_cmd place_pins \
     -hor_layers $::env(IO_PLACER_H) \
     -ver_layers $::env(IO_PLACER_V) \
-    {*}$::env(PLACE_PINS_ARGS)
+    {*}[env_var_or_empty PLACE_PINS_ARGS]
   write_db $::env(RESULTS_DIR)/3_2_place_iop.odb
   write_pin_placement $::env(RESULTS_DIR)/3_2_place_iop.tcl
 } else {