Build error

[Siddhartha123]

Hi, I am trying to build Parser-Verilog on my ubuntu system. I am getting the following error from make command.

/usr/bin/cmake -H/home/<...>/Parser-Verilog -B/home/<...>/Parser-Verilog/build --check-build-system CMakeFiles/Makefile.cmake 0
/usr/bin/cmake -E cmake_progress_start /home/<...>/Parser-Verilog/build/CMakeFiles /home/<...>/Parser-Verilog/build/CMakeFiles/progress.marks
make -f CMakeFiles/Makefile2 all
make[1]: Entering directory '/home/<...>/Parser-Verilog/build'
make -f CMakeFiles/regression.dir/build.make CMakeFiles/regression.dir/depend
make[2]: Entering directory '/home/<...>/Parser-Verilog/build'
[  5%] [FLEX][verilog_lexer] Building scanner with flex 2.6.4
cd /home/<...>/Parser-Verilog && /usr/bin/flex -o/home/<...>/Parser-Verilog/build/verilog_lexer.yy.cc /home/<...>/Parser-Verilog/parser-verilog/verilog_lexer.l
[ 11%] [BISON][verilog_parser] Building parser with bison 3.0.4
cd /home/<...>/Parser-Verilog && /usr/bin/bison -d -o /home/<...>/Parser-Verilog/build/verilog_parser.tab.cc /home/<...>/Parser-Verilog/parser-verilog/verilog_parser.yy
/home/<...>/Parser-Verilog/parser-verilog/verilog_parser.yy: warning: 2 shift/reduce conflicts [-Wconflicts-sr]
/home/<...>/Parser-Verilog/parser-verilog/verilog_parser.yy:6.9-24: error: %define variable 'api.parser.class' is not used
 %define api.parser.class {VerilogParser}
         ^^^^^^^^^^^^^^^^
CMakeFiles/regression.dir/build.make:64: recipe for target 'verilog_parser.tab.cc' failed
make[2]: *** [verilog_parser.tab.cc] Error 1
make[2]: Leaving directory '/home/<...>/Parser-Verilog/build'
CMakeFiles/Makefile2:70: recipe for target 'CMakeFiles/regression.dir/all' failed
make[1]: *** [CMakeFiles/regression.dir/all] Error 2
make[1]: Leaving directory '/home/<...>/Parser-Verilog/build'
Makefile:97: recipe for target 'all' failed
make: *** [all] Error 2

Also attaching CMake log -

-- The CXX compiler identification is GNU 7.5.0
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Found BISON: /usr/bin/bison (found version "3.0.4") 
-- Found FLEX: /usr/bin/flex (found version "2.6.4") 
-- Configuring done
-- Generating done
-- Build files have been written to: /home/<...>/Parser-Verilog/build

Has anyone else encountered this error before ?