Cabal config for compiler flags and runtime options

Question

I'm trying to get a cabal config equivalent to compiling with ghc -threaded -O2 then running with my.exe +RTS -N4 -s. Currently I have

executable my.exe
   ghc-options: 
        -O3
        -threaded
        -rtsopts
        -with-rtsopts="-N4"
   main-is: Main.hs

When I run my.exe it gives me unexpected RTS argument: -N4

Have you tried it without the quotes around the `-N4`? [This question](http://stackoverflow.com/questions/6505648/building-with-runtime-flags-using-cabal-and-ghc) seems very similar to yours. — bheklilr, Oct 31 '14 at 16:50

score 7 · Accepted Answer · edited Jun 20 '20 at 09:12

7

For multiple options, put the entire field in quotes:

"-with-rtsopts=-N4 -s"

Alternatively, you can add each option seperately:

-with-rtsopts=-N4

-with-rtsopts=-s

edited Jun 20 '20 at 09:12

Community

answered Oct 31 '14 at 16:56

ftl

But doing `-N4 -s` does not work. how do I add `-s` ? – Dulguun Otgon Oct 31 '14 at 17:21
Sorry, I overlooked the -s flag. I think adding another line will do the trick, but I'd be happy to hear about a single line solution. – ftl Oct 31 '14 at 20:10
Put the entire thing in quotes - "-with-rtsopts=-N4 -s" – user2407038 Nov 02 '14 at 05:03
Oh, that's nice, wouldn't have thought of that :) Thanks, I updated the answer accordingly. – ftl Nov 02 '14 at 11:33

1 Answers1