From 98ae7637e8b4ddcccb2573ddca579fb04a66306c Mon Sep 17 00:00:00 2001
From: Ryan Curtin <ryan@ratml.org>
Date: Tue, 9 Oct 2018 11:13:21 -0400
Subject: [PATCH] Handle DESTDIR correctly for Python bindings.

This patch is from @marcespie from #1522.
---
 src/mlpack/bindings/python/CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mlpack/bindings/python/CMakeLists.txt b/src/mlpack/bindings/python/CMakeLists.txt
index 88ec98a949..18f1ce81cd 100644
--- a/src/mlpack/bindings/python/CMakeLists.txt
+++ b/src/mlpack/bindings/python/CMakeLists.txt
@@ -164,10 +164,10 @@ execute_process(COMMAND ${PYTHON}
     "${CMAKE_CURRENT_SOURCE_DIR}/print_python_version.py" "${CMAKE_INSTALL_PREFIX}"
     OUTPUT_VARIABLE NEW_PYTHONPATH)
 install(CODE "set(ENV{PYTHONPATH} ${NEW_PYTHONPATH})")
-install(CODE "execute_process(COMMAND mkdir -p ${NEW_PYTHONPATH})")
+install(CODE "execute_process(COMMAND mkdir -p $ENV{DESTDIR}${NEW_PYTHONPATH})")
 install(CODE "execute_process(COMMAND ${PYTHON}
     \"${CMAKE_BINARY_DIR}/src/mlpack/bindings/python/setup.py\" install
-    --prefix=${CMAKE_INSTALL_PREFIX}
+    --prefix=${CMAKE_INSTALL_PREFIX} --root=$ENV{DESTDIR}
     WORKING_DIRECTORY \"${CMAKE_BINARY_DIR}/src/mlpack/bindings/python/\")")
 
 # Prepare __init__.py for having all of the convenience imports appended to it.