fix #43 mac libs should be linked against @rpath

[koskokos2]

This is fix for #43 mac. The best way how to deal with a problem of absolute paths embedded into binary is to replace the with @rpath, it requires list of paths where to look for libraries. Also I stopped linking against all libs libcurl depends on and link only against libcurl as this binary only depends on libcurl and libcurl itself handling its own dependencies just fine.

[simiansim]

@koskokos2 or @JCMais I think this line might need a semi colon:
CURL_PREFIX=/usr/local;
https://github.com/koskokos2/node-libcurl/blob/linking-improvement-mac/.travis.yml#L88

When run by travis...

if [[ $TRAVIS_OS_NAME == "osx" ]]; then
   CURL_PREFIX=/usr/local
fi

it look like this gets rewritten into

if [[ $TRAVIS_OS_NAME == "osx" ]]; then CURL_PREFIX=/usr/local fi

And so the bash "fi" is lost within the "then"

[koskokos2]

yeah right thanks, used to regular bash scripting and here that is just single line, so needs that semicolon

[simiansim]

Awesome then, Cheers. This issue has bugged me for a while. You seem to have the insight required. Happy to help.

[JCMais]

I will merge this on this weekend and create a pre-release for it so it can be tested.

Thanks for all the work you have done on this