From c00d2517999fdc4440bbd8e42f12c765c844ab4a Mon Sep 17 00:00:00 2001
From: Wes McKinney <wes.mckinney@twosigma.com>
Date: Tue, 1 Nov 2016 18:23:33 -0400
Subject: [PATCH] Add explicit environment variable to locate libhdfs in one's
 environment

Change-Id: I29bdaaa24e57f29ab96bb33fcb8476735de077f0
---
 cpp/src/arrow/io/libhdfs_shim.cc | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/cpp/src/arrow/io/libhdfs_shim.cc b/cpp/src/arrow/io/libhdfs_shim.cc
index 07eb6250bbe..1fee595d071 100644
--- a/cpp/src/arrow/io/libhdfs_shim.cc
+++ b/cpp/src/arrow/io/libhdfs_shim.cc
@@ -386,6 +386,11 @@ static std::vector<fs::path> get_potential_libhdfs_paths() {
     search_paths.push_back(path);
   }
 
+  const char* libhdfs_dir = std::getenv("ARROW_LIBHDFS_DIR");
+  if (libhdfs_dir != nullptr) {
+    search_paths.push_back(fs::path(libhdfs_dir));
+  }
+
   // All paths with file name
   for (auto& path : search_paths) {
     libhdfs_potential_paths.push_back(path / file_name);