Avoid parallel build conflicts (#198)

The Liberty, Sdf, and Verilog parsers were writing to the same files
causing random failures in parallel builds.  position.hh and stack.hh
are removed by switching to 3.0 to 3.2 in the require statement.
location.hh is renamed per-parser with api.location.file.

Signed-off-by: Matt Liberty <mliberty@precisioninno.com>

liberty/LibertyParse.yy

@@ -38,11 +38,12 @@
 #define loc_line(loc) loc.begin.line
 %}
 
-%require  "3.0"
+%require  "3.2"
 %skeleton "lalr1.cc"
 %debug
 %define api.namespace {sta}
 %locations
+%define api.location.file "LibertyLocation.hh"
 %define parse.assert
 %parse-param { LibertyScanner *scanner }
 %parse-param { LibertyParser *reader }

liberty/LibertyScanner.hh

@@ -30,7 +30,7 @@
 #include <FlexLexer.h>
 #endif
 
-#include "location.hh"
+#include "LibertyLocation.hh"
 #include "LibertyParse.hh"
 
 namespace sta {

sdf/SdfParse.yy

@@ -35,11 +35,12 @@
 #pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 %}
 
-%require  "3.0"
+%require  "3.2"
 %skeleton "lalr1.cc"
 %debug
 %define api.namespace {sta}
 %locations
+%define api.location.file "SdfLocation.hh"
 %define parse.assert
 %parse-param { SdfScanner *scanner }
 %parse-param { SdfReader *reader }

sdf/SdfScanner.hh

@@ -30,7 +30,7 @@
 #include <FlexLexer.h>
 #endif
 
-#include "location.hh"
+#include "SdfLocation.hh"
 #include "SdfParse.hh"
 
 namespace sta {

verilog/VerilogParse.yy

@@ -48,11 +48,12 @@ sta::VerilogParse::error(const location_type &loc,
 }
 %}
 
-%require  "3.0"
+%require  "3.2"
 %skeleton "lalr1.cc"
 %debug
 %define api.namespace {sta}
 %locations
+%define api.location.file "VerilogLocation.hh"
 %define parse.assert
 %parse-param { VerilogScanner *scanner }
 %parse-param { VerilogReader *reader }

verilog/VerilogScanner.hh

@@ -30,7 +30,7 @@
 #include <FlexLexer.h>
 #endif
 
-#include "location.hh"
+#include "VerilogLocation.hh"
 #include "VerilogParse.hh"
 
 namespace sta {