Hi, I have been trying to build yt on Legion cluster at University College London. My default modules are... Currently Loaded Modulefiles: 1) shared 5) infinipath/base/2.1 9) nedit/5.6 2) intel/fce/10.1.008 6) infinipath/mpi/intel/2.1 10) mrxvt/0.5.4 3) intel/cce/10.1.008 7) torque/2.2.1 11) hdf5/1.6.6 4) intel/mkl/64emt/10.0.2.018 8) moab/5.3.0 I did a module purge. And added gcc module... Currently Loaded Modulefiles: 1) GCC/4.4.1 But, the install_script.sh crashes when building matplot with the following warning in the yt_install.log... gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -DPY_ARRAY_UNIQUE_SYMBOL=MPL_ARRAY_API -I/home/ucapsag/enzo3/src/yt/doc/yt-x86_64/lib/python2.6/site-packages/numpy/core/include -I/usr/local/include -I/usr/include -I. -I/home/ucapsag/enzo3/src/yt/doc/yt-x86_64/lib/python2.6/site-packages/numpy/core/include -Isrc -Iagg24/include -I. -I/home/ucapsag/enzo3/src/yt/doc/yt-x86_64/include/python2.6 -c src/path.cpp -o build/temp.linux-x86_64-2.6/src/path.o cc1plus: warning: command line option "-Wstrict-prototypes" is valid for Ada/C/ObjC but not for C++ In file included from /shared/ucl/test/GCC4/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../include/c++/4.4.1/ext/hash_map:59, from ./CXX/Extensions.hxx:68, from src/path.cpp:8: /shared/ucl/test/GCC4/lib/gcc/x86_64-unknown-linux-gnu/4.4.1/../../../../include/c++/4.4.1/backward/backward_warning.h:28:2: warning: #warning This file includes at least one deprecated or antiquated header which may be removed without further notice at a future date. Please use a non-deprecated interface with equivalent functionality instead. For a listing of replacement headers and interfaces, consult the file backward_warning.h. To disable this warning use -Wno-deprecated. Please let me know what could be happening here. Shankar