Split spqr and cholmod lib components

Findsuitesparse.cmake

@@ -1,4 +1,4 @@
-if (TARGET suitesparse::suitesparse)
+if (TARGET suitesparse::cholmod OR TARGET suitesparse::spqr)
   return()
 endif()
 
@@ -12,36 +12,57 @@ if (APPLE)
     /opt/homebrew/Cellar/suite-sparse/*
   )
 else ()
-  file(GLOB SUITESPARSE_DIRS
-    /usr/include/suitesparse/*
-  )
+  set(SUITESPARSE_DIRS /usr/include/suitesparse)
 endif()
 
-find_path(suitesparse_INCLUDE_DIR
-  NAMES SuiteSparseQR.hpp cholmod.h
+find_path(suitesparse_cholmod_INCLUDE_DIR
+  NAMES cholmod.h
   HINTS ${SUITESPARSE_DIRS}
   PATH_SUFFIXES include
 )
 
-find_library(suitesparse_LIBRARY
-  NAMES spqr cholmod
+find_path(suitesparse_spqr_INCLUDE_DIR
+  NAMES SuiteSparseQR.hpp
+  HINTS ${SUITESPARSE_DIRS}
+  PATH_SUFFIXES include
+)
+
+find_library(suitesparse_cholmod_LIBRARY
+  NAMES cholmod
+  HINTS ${SUITESPARSE_DIRS}
+  PATH_SUFFIXES lib
+)
+
+find_library(suitesparse_spqr_LIBRARY
+  NAMES spqr
   HINTS ${SUITESPARSE_DIRS}
   PATH_SUFFIXES lib
 )
 
 find_package_handle_standard_args(suitesparse REQUIRED_VARS
-    suitesparse_LIBRARY
-    suitesparse_INCLUDE_DIR
+  suitesparse_cholmod_LIBRARY
+  suitesparse_spqr_LIBRARY
+  suitesparse_cholmod_INCLUDE_DIR
+  suitesparse_spqr_INCLUDE_DIR
 )
 
 if (suitesparse_FOUND)
-  mark_as_advanced(suitesparse_LIBRARY)
-  mark_as_advanced(suitesparse_INCLUDE_DIR)
+  mark_as_advanced(suitesparse_cholmod_LIBRARY)
+  mark_as_advanced(suitesparse_cholmod_INCLUDE_DIR)
+
+  add_library(suitesparse::cholmod UNKNOWN IMPORTED)
+  set_target_properties(suitesparse::cholmod
+      PROPERTIES
+      IMPORTED_LOCATION ${suitesparse_cholmod_LIBRARY}
+      INTERFACE_INCLUDE_DIRECTORIES ${suitesparse_cholmod_INCLUDE_DIR}
+  )
 
-  add_library(suitesparse::suitesparse UNKNOWN IMPORTED)
-  set_target_properties(suitesparse::suitesparse
+  mark_as_advanced(suitesparse_spqr_LIBRARY)
+  mark_as_advanced(suitesparse_spqr_INCLUDE_DIR)
+  add_library(suitesparse::spqr UNKNOWN IMPORTED)
+  set_target_properties(suitesparse::spqr
       PROPERTIES
-      IMPORTED_LOCATION ${suitesparse_LIBRARY}
-      INTERFACE_INCLUDE_DIRECTORIES ${suitesparse_INCLUDE_DIR}
+      IMPORTED_LOCATION ${suitesparse_spqr_LIBRARY}
+      INTERFACE_INCLUDE_DIRECTORIES ${suitesparse_spqr_INCLUDE_DIR}
   )
 endif ()