How to compile dependencies for profiling in a cabal sandbox

Question

I'm trying to compile one of my executables with profiling options. I added the -prof options in my cabal file. When I do that, I get a message saying

Could not find module ‘Package-X’
Perhaps you haven't installed the profiling libraries for package ‘package-x’?
Use -v to see a list of the files searched for.

How do I do that? I tried cabal install --only-dependency --reinstall and I get the following response :

All the requested packages are already installed:
Use --reinstall if you want to reinstall anyway.

I already used --reinstall what should I do ? I also tried cabal configure --enable-profiling-libraries etc ...

Answer 1

The link suggested by bheklilr helped but didn't straight away.

I ended up adding library-profiling: True in my .cabal/config file and reinstall everything. cabal install --reinstall wolrd didn't work, maybe because I'm inside a sandbox. However, the good things about sandboxes is that you can ditch them away so I reinstalled everything using

cabal sandbox delete
cabal sandbox init
cabal install

Even though this solution worked, it's not satisfactory for the following reasons :

• I had to modify .cabal/config which is a global file, whereas in a ideal wolrd I should have had to only modify my sandbox. However, I didn't try to create a local cabal config file

• I had to reinstall EVERYTHING, ie the profiling version of each library as well as the plain version, which was already installed.