From 395bd727a17fc68c12c5963e11a7f2d99a1d012b Mon Sep 17 00:00:00 2001
From: Alan Mishchenko <alanmi@berkeley.edu>
Date: Tue, 12 Apr 2016 11:16:22 -0700
Subject: Typo in Makefile.

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index bdc9822b..2fc63936 100644
--- a/Makefile
+++ b/Makefile
@@ -76,7 +76,7 @@ ifndef ABC_USE_NO_READLINE
 endif
 
 # whether to compile with thread support
-ifdef ABC_USE_NO_PTHREADS
+ifndef ABC_USE_NO_PTHREADS
   CFLAGS += -DABC_USE_PTHREADS
   LIBS += -lpthread
   $(info $(MSG_PREFIX)Using pthreads)
-- 
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