Can't build Facebooks HHVM from Github (git submodule init) - facebook

Question

When I run these steps:
mkdir dev
cd dev
git clone git://github.com/facebook/hhvm.git
cd hhvm
git submodule init
export CMAKE_PREFIX_PATH=`pwd`/..
export HPHP_HOME=`pwd`
cd ..
url: https://github.com/facebook/hhvm/wiki/Building-and-installing-HHVM-on-Ubuntu-12.04
I get stuck at the git submodule init I get the error: Submodule 'hphp/submodules/folly' () registered for path 'hphp/submodules/folly'
I have no clue what it means and it doesn't look like a fatal error...
UPDATE:
git submodule sync does sync php/submodules/folly but still the same error...

Answer 1

I would try:
git submodule update --init --recursive
And make sure that "Submodule 'xxx' registered for path 'yyy'" is indeed an error message: it looks like a standard answer for a git submodule init command.
From the git submodule book page:
The rack directory is there, but empty.
You must run two commands:
git submodule init to initialize your local configuration file, and
git submodule update to fetch all the data from that project and check out the appropriate commit listed in your superproject:
$ git submodule init
Submodule 'rack' (git://github.com/chneukirchen/rack.git) registered for path 'rack'
$ git submodule update
Initialized empty Git repository in /opt/myproject/rack/.git/
remote: Counting objects: 3181, done.
remote: Compressing objects: 100% (1534/1534), done.
remote: Total 3181 (delta 1951), reused 2623 (delta 1603)
Receiving objects: 100% (3181/3181), 675.42 KiB | 173 KiB/s, done.
Resolving deltas: 100% (1951/1951), done.
Submodule path 'rack': checked out '08d709f78b8c5b0fbeb7821e37fa53e69afcf433'
I prefer running only one command:
git submodule update --init