Osx makefile

[aherlihy]

Hi,

I modified the makefile so that it compiles on Darwin. I've put each change in a separate commit in case you would like to separate them.

The only issue I haven't been able to resolve is the ArgumentsAdjuster API change. If you have the time, I would appreciate any input you might have.

Thank you!

[eliben]

Thanks, @aherlihy

I'll have to think a bit whether I want this in the Makefile, or just to point folks to this pull request if they ask about Darwin.

[unphased]

I just tested this on Centos 7 Linux (master branch and llvm/clang checked out at r224244) and linking succeeds with the change of removing -Wl,--{start,end}-group and adding -Wl,-undefined,dynamic_lookup to the $(PLUGIN_LDFLAGS).

This indicates to me that it is a better way to write the makefile since it would then work out of the box (and without any makefile environment switch) in both linux and OS X.

[tbg]

Confirmed that this worked for me on OSX at 5.0 with only the line PLUGIN_LDFLAGS := -shared -Wl,-undefined,dynamic_lookup (I didn't build the clang-stuff though, only the pure llvm).

Thanks @aherlihy!