From a0bc6d7472daaf2f0814462f5dcd74615555e71e Mon Sep 17 00:00:00 2001
From: Carles Fernandez <carles.fernandez@gmail.com>
Date: Sat, 2 Jul 2016 12:02:13 +0200
Subject: [PATCH] Don't override the BOOST_ROOT environment variable

---
 .../libs/volk_gnsssdr_module/volk_gnsssdr/CMakeLists.txt        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/CMakeLists.txt b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/CMakeLists.txt
index 2e7097377..cdf9d9553 100644
--- a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/CMakeLists.txt
+++ b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/CMakeLists.txt
@@ -57,7 +57,7 @@ include(VolkVersion) #setup version info
 ########################################################################
 # Environment setup
 ########################################################################
-IF(NOT DEFINED BOOST_ROOT)
+IF(NOT DEFINED BOOST_ROOT AND NOT DEFINED ENV{BOOST_ROOT})
     SET(BOOST_ROOT ${CMAKE_INSTALL_PREFIX})
 ENDIF()