Documentation.md

+## Modules (Voltar)
+
+```
+module use $HOME/x86/modulefiles
+module load openblas/git cuda gcc hwloc cmake automake autoconf
+```
+
+## StarPU
+
+Clone it:
+
+```
+git clone https://gitlab.inria.fr/starpu/starpu.git
+```
+
+Configure and compile it:
+
+```
+./autogen.sh
+./configure --prefix=$PWD/install --with-cuda-dir=/$CUDA --disable-socl --disable-opencl --enable-blas-lib=openblas --disable-mpi --disable-build-doc
+make -j install
+```
+
+Notes:
+- I had issues with OpenBLAS, even though I am setting the pkg path in my module:
+```
+export PKG_CONFIG_PATH=$HOME/x86/OpenBLAS/install/lib64/pkgconfig:$PKG_CONFIG_PATH
+```
+In configure.ac, I replace this line:
+```
+    PKG_CHECK_MODULES([OPENBLAS], [blas-openblas],
+```
+with this line:
+```
+    PKG_CHECK_MODULES([OPENBLAS], [openblas],
+```
+
+- Since I cannot build the documentation on Voltar, I disable it with `--disable-build-doc`. However, `make install` seems to try to go into directories related to this documentation that do not exist. I `mkdir` them when make complains and that's it.
+
+## Apex
+
+Clone it. The StarPU support is on my fork:
+```
+git clone git@github.com:coti/apex.git
+```
+
+Compile it. For me:
+```
+mkdir build install
+cd build
+cmake .. -DAPEX_WITH_BFD=ON -DCMAKE_INSTALL_PREFIX=$PWD/../install -DAPEX_WITH_STARPU=ON -DSTARPU_INCLUDE_DIR=$HOME/x86/starpu/install/include/starpu/1.3 -DSTARPU_LIBRARY=$HOME/x86/starpu/install/lib/libstarpu-1.3.so
+make -j install
+```
+
+Apex installs some dependencies if it cannot find them, so we need to set the `LD_LIBRARY_PATH` to use them:
+```
+export LD_LIBRARY_PATH=~/x86/apex/install//binutils/lib:~/x86/apex/install/otf2/lib:$LD_LIBRARY_PATH
+```
+
+Then... voila
+```
+ ~/x86/apex/install/bin/apex_exec --apex:cuda ./axpy 
+```