cmake: fix variable name when enabling languages for external dependencies

Author: andrea-iob

CMakeLists.txt

@@ -733,8 +733,8 @@ set(LAPACKE_LANGUAGES "C")
 set(PETSC_LANGUAGES "Fortran;C")
 
 foreach(DEP_NAME IN LISTS EXTERNAL_DEPS)
-    if(DEFINED ${DEP_NAME}_LANGUAGES)
-        string(TOUPPER ${DEP_NAME} UPPER_DEP_NAME)
+    string(TOUPPER ${DEP_NAME} UPPER_DEP_NAME)
+    if(DEFINED ${UPPER_DEP_NAME}_LANGUAGES)
         foreach(LANGUAGE IN LISTS ${UPPER_DEP_NAME}_LANGUAGES)
             enable_language(${LANGUAGE})
         endforeach()