Topic/jemalloc - build script to fetch and build jemalloc from its master repo

[arosenberger]

@densh Is there an easy way to hook up an sbt task to call the build.sh script? Otherwise I think it is fine to leave it is a manual step when wanting to build against the latest jemalloc.

[densh]

Have you considered including jemalloc's github repo using git submodules? Why did you prefer to use manual fetch instead?

It's indeed possible to make sbt launch the script. I'll get them aquatinted with one another once we merge this.

[arosenberger]

@densh The following issues are ready and the build aside from JDK6 is green:

• teach build infrastructure to automatically fetch and build latest jemalloc [done through a git clone / git pull instead of submodules for now]
• decide if we want to support JDK6 [not supported for now]
• ensure that casting between offheap.Size to size_t and offheap.Addr and void* are correct and work both on 32-bit and 64-bit platforms [offhead.Size -> size_t check is in place, not yet on the void* -> offheap.Addr]

I tried a bunch of things as evidenced by the string of broken CI runs. I ended up building the native code on an Ubuntu 12.04 image and as such the bindings should work on any client where the glibc version is >= 2.15

Thanks, Adam

[densh]

I think it's OK that we don't support JDK6, lets drop it officially.