Eliminate CMake FindPackageHandleStandardArgs warnings.

CMake complains that the package name does not match when the case
differs, e.g.:
```
CMake Warning (dev) at /usr/share/cmake-3.18/Modules/FindPackageHandleStandardArgs.cmake:273 (message):
  The package name passed to `find_package_handle_standard_args` (UMFPACK)
  does not match the name of the calling package (Umfpack).  This can lead to
  problems in calling code that expects `find_package` result variables
  (e.g., `_FOUND`) to follow a certain pattern.
Call Stack (most recent call first):
  cmake/FindUmfpack.cmake:50 (find_package_handle_standard_args)
  bench/spbench/CMakeLists.txt:24 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.
```
Here we rename the libraries to match their true cases.

1 files changed, 53 insertions, 0 deletions

diff --git a/cmake/FindUMFPACK.cmake b/cmake/FindUMFPACK.cmake
new file mode 100644
index 000000000..91cf6372f
--- /dev/null
+++ b/cmake/FindUMFPACK.cmake
@@ -0,0 +1,53 @@
+# Umfpack lib usually requires linking to a blas library.
+# It is up to the user of this module to find a BLAS and link to it.
+
+if (UMFPACK_INCLUDES AND UMFPACK_LIBRARIES)
+  set(UMFPACK_FIND_QUIETLY TRUE)
+endif ()
+
+find_path(UMFPACK_INCLUDES
+  NAMES
+  umfpack.h
+  PATHS
+  $ENV{UMFPACKDIR}
+  ${INCLUDE_INSTALL_DIR}
+  PATH_SUFFIXES
+  suitesparse
+  ufsparse
+)
+
+find_library(UMFPACK_LIBRARIES umfpack PATHS $ENV{UMFPACKDIR} ${LIB_INSTALL_DIR})
+
+if(UMFPACK_LIBRARIES)
+
+  if(NOT UMFPACK_LIBDIR)
+    get_filename_component(UMFPACK_LIBDIR ${UMFPACK_LIBRARIES} PATH)
+  endif()
+
+  find_library(COLAMD_LIBRARY colamd PATHS ${UMFPACK_LIBDIR} $ENV{UMFPACKDIR} ${LIB_INSTALL_DIR})
+  if(COLAMD_LIBRARY)
+    set(UMFPACK_LIBRARIES ${UMFPACK_LIBRARIES} ${COLAMD_LIBRARY})
+  endif ()
+  
+  find_library(AMD_LIBRARY amd PATHS ${UMFPACK_LIBDIR} $ENV{UMFPACKDIR} ${LIB_INSTALL_DIR})
+  if(AMD_LIBRARY)
+    set(UMFPACK_LIBRARIES ${UMFPACK_LIBRARIES} ${AMD_LIBRARY})
+  endif ()
+
+  find_library(SUITESPARSE_LIBRARY SuiteSparse PATHS ${UMFPACK_LIBDIR} $ENV{UMFPACKDIR} ${LIB_INSTALL_DIR})
+  if(SUITESPARSE_LIBRARY)
+    set(UMFPACK_LIBRARIES ${UMFPACK_LIBRARIES} ${SUITESPARSE_LIBRARY})
+  endif ()
+
+  find_library(CHOLMOD_LIBRARY cholmod PATHS $ENV{UMFPACK_LIBDIR} $ENV{UMFPACKDIR} ${LIB_INSTALL_DIR})
+  if(CHOLMOD_LIBRARY)
+    set(UMFPACK_LIBRARIES ${UMFPACK_LIBRARIES} ${CHOLMOD_LIBRARY})
+  endif()
+
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(UMFPACK DEFAULT_MSG
+                                  UMFPACK_INCLUDES UMFPACK_LIBRARIES)
+
+mark_as_advanced(UMFPACK_INCLUDES UMFPACK_LIBRARIES AMD_LIBRARY COLAMD_LIBRARY CHOLMOD_LIBRARY SUITESPARSE_LIBRARY)