Merge from upstream

README.md

@@ -210,11 +210,13 @@ Use Homebrew to install them.
 
 Set these variables before using cmake to cirumvent the Xcode versions.
 
+```
   # flex/bison override apple version
   export PATH="$(brew --prefix bison)/bin:${PATH}"
   export PATH="$(brew --prefix flex)/bin:${PATH}"
   export CMAKE_INCLUDE_PATH="$(brew --prefix flex)/include"
   export CMAKE_LIBRARY_PATH="$(brew --prefix flex)/lib;$(brew --prefix bison)/lib"
+```
 
 Homebrew does not support tclreadline, but the macports system does
 (see https://www.macports.org). 

parasitics/SpefReader.cc

@@ -502,7 +502,7 @@ SpefReader::findParasiticNode(char *name,
           warn(1656, "pin %s not found.", name1);
       }
       else
-        warn(1656, "pin %s not found.", name);
+        warn(1657, "pin %s not found.", name);
     }
   }
   return nullptr;

sdc/Sdc.i

@@ -1324,12 +1324,12 @@ filter_timing_arcs(const char *property,
 ////////////////////////////////////////////////////////////////
 
 StringSeq
-get_path_groups()
+path_group_names()
 {
-  StringSeq path_groups;
-  for (auto gp : Sta::sta()->sdc()->groupPaths())
-    path_groups.push_back(gp.first);
-  return path_groups;
+  StringSeq pg_names;
+  for (auto const& [name, group] : Sta::sta()->sdc()->groupPaths())
+    pg_names.push_back(name);
+  return pg_names;
 }
 
 ////////////////////////////////////////////////////////////////

test/path_group_names.ok

@@ -0,0 +1,2 @@
+Initial path groups: 
+Final path groups: In2Out In2Reg Reg2Out Reg2Reg

test/path_group_names.tcl

@@ -0,0 +1,14 @@
+# path_group_names
+
+read_liberty asap7_small.lib.gz
+read_verilog reg1_asap7.v
+link_design top
+create_clock -name clk -period 500 {clk1 clk2 clk3}
+set_input_delay -clock clk 0 [all_inputs -no_clocks]
+set_output_delay -clock clk 0 [all_outputs]
+puts "Initial path groups: [sta::path_group_names]"
+group_path -name In2Reg -from [all_inputs] -to [all_registers -data_pins]
+group_path -name In2Out -from [all_inputs] -to [all_outputs]
+group_path -name Reg2Out -from [all_registers -clock_pins] -to [all_outputs]
+group_path -name Reg2Reg -from [all_registers -clock_pins] -to [all_registers -data_pins]
+puts "Final path groups: [sta::path_group_names]"

test/regression_vars.tcl

@@ -151,6 +151,7 @@ record_sta_tests {
   liberty_ccsn
   liberty_latch3
   package_require
+  path_group_names
   prima3
   report_checks_src_attr
   report_json1