haskell makefile import library

Question

So I have the following makefile which I want to use to compile my haskell program. However, in my program.hs file I have imported a library that is not in the standard Haskell distribution (e.g. Data.List). As a result, when I try to compile I get the error below. How can I include the said library so that it compiles fine? P.S. I am NOT interested in other approaches which do not involve a makefile, thank you.

error:

Linking program...
ld: library not found for -lcrt0.o
clang: error: linker command failed with exit code 1 (use -v to see invocation)

makefile:

 program: program.hs
        ghc --make -static -optl-static program.hs

`crt0` is a C library, not a Haskell one. Something is going wrong, and it does not depend on Haskell libraries. I wonder if your `clang` can produce static executables from C sources (?) — chi, Mar 14 '18 at 17:45
@chi thx for the answer, I dont know anything about c, but I was getting `gcc failed in phase Linker. (Exit code: 1) makefile:2: recipe for target 'program' failed make: ***[program] Error 1` without the 2 static options and adding them fixed it — Sreten Jocić, Mar 14 '18 at 17:55
As you seem to have anticipated, the reasonable answer is: _don't use `make` to build Haskell projects, use `cabal` or `stack` instead_. Make, especially GNU Make, is bogged down not only with anachronistic environment assumptions but also ridiculous implicit rules for languages nobody has been using for 30 years anymore. (Well, not literally _nobody_, and of course you can and should just turn those off, but still...) If it matters because you don't have root permissions and only GHC installed, note that `stack` can be installed entirely in user space. — leftaroundabout, Mar 14 '18 at 19:25
@leftaroundabout Of course `cabal` can be installed entirely in user space, too (and that is the default behavior of `bootstrap.sh`). — Daniel Wagner, Mar 14 '18 at 22:40

score 0 · Accepted Answer · answered Mar 17 '18 at 00:40

You went down the wrong path with static options. I assume you're on os-x. As explained at ld: library not found for -lcrt0.o on OSX 10.6 with gcc/clang -static flag that just makes things worse. In fact you got a different error, because you got an earlier error.

To write a good makefile, first ensure you can run ghc to compile the program without make, just by running the commands in the shell.

I.e. try to compile just ghc --make program.hs and see what happens. If you have the other libraries in your package environment already, it doesn't matter if they're in the standard distribution or not.

haskell makefile import library

1 Answers1