From 9771bb1966a427565b9a0555c144612254bfcaf1 Mon Sep 17 00:00:00 2001
From: Thomas Karl Pietrowski <thopiekar@googlemail.com>
Date: Thu, 18 Nov 2021 21:19:07 +0100
Subject: [PATCH] SIPMacros: Allow installation to a custom location

Python3_SITEARCH will point to the system directory rather than a prefix or user-defined location.
Let's change the behaviour so it acts like libCharon.
---
 cmake/SIPMacros.cmake | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cmake/SIPMacros.cmake b/cmake/SIPMacros.cmake
index 14544d2..ae1813c 100644
--- a/cmake/SIPMacros.cmake
+++ b/cmake/SIPMacros.cmake
@@ -124,6 +124,12 @@ MACRO(ADD_SIP_PYTHON_MODULE MODULE_NAME MODULE_SIP)
         SET_TARGET_PROPERTIES(${_logical_name} PROPERTIES SUFFIX ".pyd" IMPORT_PREFIX "_")
     ENDIF (WIN32)
 
-    INSTALL(TARGETS ${_logical_name} DESTINATION "${Python3_SITEARCH}/${_parent_module_path}")
+    if(EXISTS /etc/debian_version)
+        set(PYTHON_SITE_INSTALL_PATH lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}/dist-packages)
+    else()
+        set(PYTHON_SITE_INSTALL_PATH lib${LIB_SUFFIX}/python${Python3_VERSION_MAJOR}.${Python3_VERSION_MINOR}/site-packages)
+    endif()
+
+    INSTALL(TARGETS ${_logical_name} DESTINATION "${PYTHON_SITE_INSTALL_PATH}/${_parent_module_path}")
 
 ENDMACRO(ADD_SIP_PYTHON_MODULE)