[CMake] A hint where SuperLU is located can be given by SUPERLU_ROOT. If

it is not found there, it silencely fails and searchs the default installtion
locations.

[[Imported from SVN: r1605]]

cmake/modules/FindSuperLU.cmake

@@ -19,12 +19,14 @@ endif(NOT BLAS_FOUND AND REQUIRED)
 # look for header files
 find_path(SUPERLU_INCLUDE_DIR
   NAMES supermatrix.h
+  HINTS ${SUPERLU_ROOT}
   PATH_SUFFIXES "superlu" "include/superlu" "include" "SRC"
 )
 
 # look for library
 find_library(SUPERLU_LIBRARY
-  NAMES "superlu" "superlu_4.3" "superlu_4.2" "superlu_4.1" "superlu_4.0" "superlu_3.1" "superlu_3.0"
+  NAMES "superlu_4.3" "superlu_4.2" "superlu_4.1" "superlu_4.0" "superlu_3.1" "superlu_3.0" "superlu"
+  HINTS ${SUPERLU_ROOT}
   PATH_SUFFIXES "lib" "lib64"
 )