Added logic to handle installation to a user-defined location

Author: dsuponitskiy-duality

CMakeLists.txt

@@ -75,20 +75,24 @@ find_package(PythonInterp REQUIRED)
 
 # Check Python version
 if(${PYTHON_VERSION_MAJOR} EQUAL 3 AND ${PYTHON_VERSION_MINOR} GREATER_EQUAL 10)
-execute_process(
-    COMMAND "${Python_EXECUTABLE}" -c "from sys import exec_prefix; print(exec_prefix)"
-    OUTPUT_VARIABLE PYTHON_SITE_PACKAGES
-    OUTPUT_STRIP_TRAILING_WHITESPACE
- )       
+    execute_process(
+        COMMAND "${Python_EXECUTABLE}" -c "from sys import exec_prefix; print(exec_prefix)"
+        OUTPUT_VARIABLE PYTHON_SITE_PACKAGES
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 else()
-execute_process(
-    COMMAND "${Python_EXECUTABLE}" -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"
-    OUTPUT_VARIABLE PYTHON_SITE_PACKAGES
-    OUTPUT_STRIP_TRAILING_WHITESPACE
- )    
+    execute_process(
+        COMMAND "${Python_EXECUTABLE}" -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())"
+        OUTPUT_VARIABLE PYTHON_SITE_PACKAGES
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 endif()
 
-
-
 message(STATUS "Python site packages directory: ${PYTHON_SITE_PACKAGES}")
-install(TARGETS openfhe LIBRARY DESTINATION ${PYTHON_SITE_PACKAGES})
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+    set(Python_Install_Location "${PYTHON_SITE_PACKAGES}")
+else()
+    set(Python_Install_Location "${CMAKE_INSTALL_PREFIX}")
+endif()
+message("***** INSTALL IS AT ${Python_Install_Location}; to change, run cmake with -DCMAKE_INSTALL_PREFIX=/your/path")
+install(TARGETS openfhe LIBRARY DESTINATION ${Python_Install_Location})