In my experience, using one of the excellent parser-combinator libraries out there (megaparsec, attoparsec, trifecta) is usually less painful and perfectly adequate. On Dec 25, 2016 7:49 AM, "Mageshkumar Kuppusamy" wrote: Hello folks, I am generating a parser for SystemVerilog language using happy parser generator. I have the *.y file which i run using happy as below happy -gca ParSysverilog.y and i get the below error. Stack space overflow: current size 8388608 bytes. Use `+RTS -Ksize -RTS' to increase it. to increase the stack size and to get more info on the error, i learned that i need to use something like below. happy -RTS -K16384 -sstderr +RTS -gca ParSysverilog.y but i got an error message happy: Most RTS options are disabled. Link with -rtsopts to enable them. does this mean that, i need to recompile happy source code using the "-rtsopts" to use the +RTS...-RTS options ? any recommendations from your experience ? Thank you in advance Magesh _______________________________________________ Haskell-Cafe mailing list To (un)subscribe, modify options or view archives go to: http://mail.haskell.org/cgi-bin/mailman/listinfo/haskell-cafe Only members subscribed via the mailman list are allowed to post.