binutils-dev isn't used

[WaDelma]

I copy pasted the required packages from the readme to my .travis.yml.

Coverage seems to work fine, but in the output I can see:

kcov: warning: kcov: WARNING: kcov has been built without libbfd-dev (or
kcov: binutils-dev), so the --verify option will not do anything.

even thought there should be binutils-dev installed.

travis log: https://travis-ci.org/WaDelma/poisson/jobs/276394285

[WaDelma]

Also btw caching cargo doesn't play nicely with cargo install as it fails if the command is already installed. There is bunch of discussion on adding way to add way to update cargo installed things. I just worked around it by just ignoring the error :P

[lu-zero]

Did you try to cargo install -f ?

[sbosnick]

This is likely caused by not having listed "libiberty-dev" as an apt package in the addon section of your travis.yml file. See #38 for my explanation for where this comes from.