DM-14305: Upgrade Eigen to 3.3.4

patches/fixCMakeNoFortran.patch

@@ -0,0 +1,21 @@
+# HG changeset patch
+# User Gael Guennebaud <g.gael@free.fr>
+# Date 1523083519 -7200
+# Branch 3.3
+# Node ID ba14974d054ae9ae4ba88e5e58012fa6c2729c32
+# Parent  8be258ef0b6d09f1c331851c708e5da1429c5c36
+Fix cmake scripts with no fortran compiler
+(grafted from 607df2a0aa39feecb4334a1a7bd9d07d858598dc)
+
+diff --git a/cmake/language_support.cmake b/cmake/language_support.cmake
+--- a/cmake/language_support.cmake
++++ b/cmake/language_support.cmake
+@@ -26,7 +26,7 @@
+     cmake_minimum_required(VERSION 2.8.0)
+     set (CMAKE_Fortran_FLAGS \"${CMAKE_Fortran_FLAGS}\")
+     set (CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}\")
+-    enable_language(${language} OPTIONAL)
++    enable_language(${language})
+   ")
+   file(REMOVE_RECURSE ${CMAKE_BINARY_DIR}/language_tests/${language})
+   file(MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/language_tests/${language})

patches/setCMakeFortranCompiler.patch

@@ -0,0 +1,19 @@
+# HG changeset patch
+# User Christoph Hertzberg <chtz@informatik.uni-bremen.de>
+# Date 1497970683 -7200
+# Node ID dbab66d00651bf050d1426334a39b627abe7216e
+# Parent  0cb43994733f413565eb6dbe1495d5ec2694436f
+Make sure CMAKE_Fortran_COMPILER is set before checking for Fortran functions
+
+diff --git a/cmake/FindBLAS.cmake b/cmake/FindBLAS.cmake
+--- a/cmake/FindBLAS.cmake
++++ b/cmake/FindBLAS.cmake
+@@ -152,7 +152,7 @@
+
+ # Check the language being used
+ get_property( _LANGUAGES_ GLOBAL PROPERTY ENABLED_LANGUAGES )
+-if( _LANGUAGES_ MATCHES Fortran )
++if( _LANGUAGES_ MATCHES Fortran AND CMAKE_Fortran_COMPILER)
+   set( _CHECK_FORTRAN TRUE )
+ elseif( (_LANGUAGES_ MATCHES C) OR (_LANGUAGES_ MATCHES CXX) )
+   set( _CHECK_FORTRAN FALSE )