From 3100ea6d55bd5f995a7dc2538c07e0b53fa56e06 Mon Sep 17 00:00:00 2001
From: Scott Beamer <sbeamer@ucsc.edu>
Date: Mon, 14 Jun 2021 11:43:07 -0700
Subject: [PATCH] [tc] encourage use of parallel sort

---
 src/tc.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/tc.cc b/src/tc.cc
index fa1ef23..97e83d0 100644
--- a/src/tc.cc
+++ b/src/tc.cc
@@ -1,6 +1,9 @@
 // Copyright (c) 2015, The Regents of the University of California (Regents)
 // See LICENSE.txt for license details
 
+// Encourage use of gcc's parallel algorithms (for sort for relabeling)
+#define _GLIBCXX_PARALLEL
+
 #include <algorithm>
 #include <cinttypes>
 #include <iostream>