flex disable register decls

CMakeLists.txt

@@ -236,6 +236,9 @@ set(STA_TCL_FILES
 #
 ################################################################
 
+# Earlier versions of flex use 'register' declarations are deprecated in c++11
+# and  illegal in c++17.
+#find_package(FLEX 2.6.4)
 find_package(FLEX)
 find_package(BISON)
 

liberty/LibertyExprLex.ll

@@ -18,6 +18,7 @@
 
 // Liberty function expression lexical analyzer
 
+#include "util/FlexDisableRegister.hh"
 #include "Debug.hh"
 #include "StringUtil.hh"
 #include "liberty/LibertyExprPvt.hh"

liberty/LibertyLex.ll

@@ -18,6 +18,7 @@
 #include <ctype.h>
 #include <string.h>
 
+#include "util/FlexDisableRegister.hh"
 #include "liberty/LibertyParser.hh"
 #include "LibertyParse.hh"
 

parasitics/SpefLex.ll

@@ -19,6 +19,7 @@
 #include <string.h>
 #include <string>
 
+#include "util/FlexDisableRegister.hh"
 #include "StringUtil.hh"
 #include "parasitics/SpefReaderPvt.hh"
 #include "SpefParse.hh"

sdf/SdfLex.ll

@@ -16,6 +16,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+#include "util/FlexDisableRegister.hh"
 #include "sdf/Sdf.hh"
 #include "SdfParse.hh"
 

util/FlexDisableRegister.hh

@@ -0,0 +1,5 @@
+// workaround for flex versions that insert register declarations
+#if !(YY_FLEX_MAJOR_VERSION >= 2 && YY_FLEX_MINOR_VERSION >= 6) && __cplusplus > 199711L
+#define register
+#endif
+

verilog/VerilogLex.ll

@@ -16,6 +16,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
+#include "util/FlexDisableRegister.hh"
 #include "Debug.hh"
 #include "VerilogNamespace.hh"
 #include "verilog/VerilogReaderPvt.hh"