Squashed 'third_party/eigen/' content from commit 61d72f6

Change-Id: Iccc90fa0b55ab44037f018046d2fcffd90d9d025
git-subtree-dir: third_party/eigen
git-subtree-split: 61d72f6383cfa842868c53e30e087b0258177257
diff --git a/cmake/FindScotch.cmake b/cmake/FindScotch.cmake
new file mode 100644
index 0000000..530340b
--- /dev/null
+++ b/cmake/FindScotch.cmake
@@ -0,0 +1,24 @@
+# Pastix requires SCOTCH or METIS (partitioning and reordering tools)
+
+if (SCOTCH_INCLUDES AND SCOTCH_LIBRARIES)
+  set(SCOTCH_FIND_QUIETLY TRUE)
+endif (SCOTCH_INCLUDES AND SCOTCH_LIBRARIES)
+
+find_path(SCOTCH_INCLUDES 
+  NAMES 
+  scotch.h 
+  PATHS 
+  $ENV{SCOTCHDIR} 
+  ${INCLUDE_INSTALL_DIR} 
+  PATH_SUFFIXES 
+  scotch
+)
+
+
+find_library(SCOTCH_LIBRARIES scotch PATHS $ENV{SCOTCHDIR} ${LIB_INSTALL_DIR})
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(SCOTCH DEFAULT_MSG
+                                  SCOTCH_INCLUDES SCOTCH_LIBRARIES)
+
+mark_as_advanced(SCOTCH_INCLUDES SCOTCH_LIBRARIES)