Update Eigen to 3.3.0

Author: robertodr

CHANGELOG.md

@@ -23,6 +23,8 @@
   See the [Green's function code
   reference](http://pcmsolver.readthedocs.io/en/latest/code-reference/greens-functions.html)
   for a more detailed explanation.
+- **BREAKING CHANGE** The minimum required version of Eigen is now 3.3.0
+  The version bundled with the code has been accordingly updated.
 
 ### Deprecated
 

cmake/custom/eigen.cmake

@@ -1,9 +1,9 @@
 #.rst:
 #
 # Detect Eigen3.
-# By default, use Eigen 3.2.0 as bundled with PCMSolver.
+# By default, use Eigen 3.3.0 as bundled with PCMSolver.
 # Look in a specific search directory, if given. If nothing is found
-# there, falls back to Eigen 3.2.0 bundled with PCMSolver.
+# there, falls back to Eigen 3.3.0 bundled with PCMSolver.
 #
 # autocmake.cfg configuration::
 #
@@ -12,14 +12,14 @@
 
 if(EIGEN3_ROOT)
   set(EIGEN3_INCLUDE_DIR ${EIGEN3_ROOT}/include)
-  find_package(Eigen3 3.1.0)
+  find_package(Eigen3 3.3.0)
   message(STATUS "Eigen " ${EIGEN3_VERSION} " is located here: " ${EIGEN3_INCLUDE_DIR})
   if(NOT EIGEN3_FOUND)
     set(EIGEN3_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/external/eigen3/include/eigen3)
-    message(STATUS "Eigen 3.2.0 is located here: " ${EIGEN3_INCLUDE_DIR})
+    message(STATUS "Eigen 3.3.0 is located here: " ${EIGEN3_INCLUDE_DIR})
   endif()
 else()
   set(EIGEN3_INCLUDE_DIR ${PROJECT_SOURCE_DIR}/external/eigen3/include/eigen3)
-  message(STATUS "Eigen 3.2.0 is located here: " ${EIGEN3_INCLUDE_DIR})
+  message(STATUS "Eigen 3.3.0 is located here: " ${EIGEN3_INCLUDE_DIR})
 endif()
 include_directories(SYSTEM ${EIGEN3_INCLUDE_DIR})

doc/users/building.rst

@@ -44,8 +44,8 @@ Libraries and toolchain programs
 + PyYAML Python module (documentation only)
 + Sphinx (documentation only)
 
-PCMSolver relies on the Eigen template libraries version 3.0.0 and higher.
-Version 3.2.0 of Eigen libraries is shipped with the module and resides in the `external` subdirectory.
+PCMSolver relies on the Eigen template libraries version 3.3.0 and higher.
+Version 3.3.0 of Eigen libraries is shipped with the module and resides in the `external` subdirectory.
 
 Configuration
 -------------