Fwd: I need help to build a project

[laila fal]

Hello,
I downloaded a project from
https://github.com/openjdk-mirror/jdk7u-hotspot/tree/master/src/share/vm/gc_implementation/g1
 jdk7u-hotspot/src/share/vm/gc_implementation/g1/

and also from
http://hg.openjdk.java.net/jdk7u/jdk7u2/hotspot/file/6259c6d3bbb7

but i have problems to build it, can you please help me?
I need details about technical environment, and may be version, OS ...

Best regards,
Thank you