Update documentation to reflect requirements changes

dexter2206 · Jan 21, 2019 · 49ba3f4 · 49ba3f4
1 parent 2257705
commit 49ba3f4
Showing 1 changed file with 5 additions and 6 deletions.
diff --git a/doc/installation.rst b/doc/installation.rst
@@ -6,7 +6,7 @@ Installing binary wheel from PyPI
 
 If you are running a Linux system and are only interested in non GPU-enabled build, you can install
 binary wheel from PyPI as usual::
-		
+
    pip install ising
 
 Unfortunately, we cannot provide GPU-enabled binary wheel due to a manylinux_ PEP-513 policy, as it is impossible to build **ising** on CentOS 5.
@@ -25,11 +25,12 @@ To build **ising** you need the following:
 
 - Virtually any C and C++ compiler,
 - A Fortran compiler. The build script supports PGI, Intel, and gfortran compilers.
-- The thrust_ library. This is installed by default alongside with CUDA toolkit, otherwise you need to make sure that thrust's include files are visible by your C++ compiler.
+- Working CUDA toolkit. For CPU based implementation only its thrust_ library with ``OMP_DEVICE_BACKEND`` is used, but ``nvcc`` is still required for compiling sources. You can get around this requirement and use your local installation of ``thrust`` if you use GNU fortran compiler.
 - ``numpy`` Python package installed in the same environment as is used to run the build process.
+- Python development headers.
 
 .. _thrust: https://thrust.github.io/
-In addition, to build a GPU-enabled version you need PGI CUDA Fortran and compatible CUDA toolkit. Our package was tested against CUDA 9.2 and CUDA 10.0.
+In addition, to build a GPU-enabled version you need PGI CUDA Fortran. Our package was tested against CUDA 9.2 and CUDA 10.0.
 
 Building and installing
 +++++++++++++++++++++++
@@ -40,6 +41,4 @@ To build the **ising** package download its source code and run ``install.py`` s
 
 where ``<fortran_compiler>`` is one of ``pgi``, ``intel``, ``gfortran``. The ``--usecuda`` switch can be used to enable GPU support. Note that ``--usecuda`` requires ``--fcompiler=pgi``.
 
-The script should take care of building extensions and installing package, so after running the above command **ising** package should be ready to use. 
-
-
+The script should take care of building extensions and installing package, so after running the above command **ising** package should be ready to use.