From e44f90277aa0786d3404d49bac7d63455168995e Mon Sep 17 00:00:00 2001
From: Benjamin Greiner <greiner@dsi.uni-stuttgart.de>
Date: Fri, 21 Jun 2019 18:43:28 +0200
Subject: [PATCH] fix CMake sitelib/sitearch issue

---
 CMakeLists.txt        | 10 ++++++++++
 slycot/CMakeLists.txt |  6 +++---
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 63b32e03..f3084168 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,5 +46,15 @@ if(WIN32)
   string(REPLACE "\\" "/" PYTHON_SITE ${PYTHON_SITE})
 endif()
 
+# base site dir, use python installation for location specific includes
+execute_process(
+  COMMAND "${PYTHON_EXECUTABLE}" -c
+  "from distutils.sysconfig import get_python_lib as pl; print(pl(plat_specific=True))"
+  OUTPUT_VARIABLE PYTHON_SITEARCH
+  OUTPUT_STRIP_TRAILING_WHITESPACE)
+if(WIN32)
+  string(REPLACE "\\" "/" PYTHON_SITEARCH ${PYTHON_SITEARCH})
+endif()
+
 add_subdirectory(slycot)
 
diff --git a/slycot/CMakeLists.txt b/slycot/CMakeLists.txt
index 3207d92c..41b062f3 100644
--- a/slycot/CMakeLists.txt
+++ b/slycot/CMakeLists.txt
@@ -128,7 +128,7 @@ add_custom_command(
 add_library(
   ${SLYCOT_MODULE} SHARED
   SLYCOTmodule.c _wrappermodule.c _wrapper-f2pywrappers.f
-  "${PYTHON_SITE}/numpy/f2py/src/fortranobject.c"
+  "${PYTHON_SITEARCH}/numpy/f2py/src/fortranobject.c"
   ${FSOURCES})
 
 set(CMAKE_SHARED_LIBRARY_PREFIX "")
@@ -161,8 +161,8 @@ endif()
 
 target_include_directories(
   ${SLYCOT_MODULE} PUBLIC
-  ${PYTHON_SITE}/numpy/core/include
-  ${PYTHON_SITE}/numpy/f2py/src
+  ${PYTHON_SITEARCH}/numpy/core/include
+  ${PYTHON_SITEARCH}/numpy/f2py/src
   ${PYTHON_INCLUDE_DIRS}
   )