I just checkout the code and issue make -j4 to compile on my ubuntu machine (14.04).
It gives me the following errors:

g++ -std=c++0x -c -DMSHADOW_FORCE_STREAM -Wall -O3 -I./mshadow/ -I./dmlc-core/include -fPIC -Iinclude -msse3 -funroll-loops -Wno-unused-parameter -Wno-unknown-pragmas -DMSHADOW_USE_CUDA=0 -DMSHADOW_USE_CBLAS=1 -DMSHADOW_USE_MKL=0 -DMSHADOW_RABIT_PS=0 -DMSHADOW_DIST_PS=0 -DMXNET_USE_OPENCV=1 pkg-config --cflags opencv -fopenmp -c src/ndarray/unary_function.cc -o build/ndarray/unary_function.o
In file included from src/ndarray/./unary_function-inl.h:9:0,
from src/ndarray/unary_function.cc:7:
src/ndarray/./../common/tblob_op_registry.h:86:16: error: ‘function’ in namespace ‘std’ does not name a template type
typedef std::function<void (const std::vector &in,
^
src/ndarray/./../common/tblob_op_registry.h:90:3: error: ‘OpType’ does not name a type
OpType op;
^
src/ndarray/./../common/tblob_op_registry.h:96:3: warning: ‘mxnet::ndarray::make_TBlobOpRegEntry_square__DEVICE’ defined but not used [-Wunused-variable]
make_ ## TBlobOpRegEntry ## _ ## Name ## __ ## DEV ## =
^
src/ndarray/./unary_function-inl.h:33:3: note: in expansion of macro ‘MXNET_REGISTER_TBLOB_FUN’
MXNET_REGISTER_TBLOB_FUN(Name, DEVICE)
^
src/ndarray/./unary_function-inl.h:38:1: note: in expansion of macro ‘REGISTER_MSHADOW_UNARY’
REGISTER_MSHADOW_UNARY(square, op::mshadow_op::square)
^
src/ndarray/./../common/tblob_op_registry.h:96:3: warning: ‘mxnet::ndarray::make_TBlobOpRegEntry_sqrt__DEVICE’ defined but not used [-Wunused-variable]
make_ ## TBlobOpRegEntry ## _ ## Name ## __ ## DEV ## =
^
src/ndarray/./unary_function-inl.h:33:3: note: in expansion of macro ‘MXNET_REGISTER_TBLOB_FUN’
MXNET_REGISTER_TBLOB_FUN(Name, DEVICE)
^
src/ndarray/./unary_function-inl.h:41:1: note: in expansion of macro ‘REGISTER_MSHADOW_UNARY’
REGISTER_MSHADOW_UNARY(sqrt, op::mshadow_op::square_root)
^
Makefile:104: recipe for target 'build/ndarray/unary_function.o' failed
make: *** [build/ndarray/unary_function.o] Error 1
make: *** Waiting for unfinished jobs....

Appreciate if someone can fix the above issue

Thanks,

Kaishi