Compilation error

Hi I cloned the latest version of the LIGGGHTS development version from git://cfdem.git.sourceforge.net/gitroot/cfdem/liggghtsdev today (3rd of November 2014) and have problems compiling it. The error message is the following:

myvector.h(37): warning #1011: missing return statement at end of non-void function "LAMMPS_NS::vectorConstruct3D"
}
^

myvector.h(44): warning #1011: missing return statement at end of non-void function "LAMMPS_NS::vectorConstruct3D(int *, int, int, int)"
}
^

cfd_datacoupling_file.cpp(218): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(252): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(287): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(321): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(356): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(387): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(419): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

cfd_datacoupling_file.cpp(451): error: identifier "sleep" is undefined
while (stat(file,&st)) sleep(0.03);
^

compilation aborted for cfd_datacoupling_file.cpp (code 2)

Is this a problem of my compilation attempt or is there a bug in the myvector.h and cfd_datacoupling_file.cpp files

Thanks for your help
Jens