From 74b4737d8f0e1922ef5314a158271acf81cd79f8 Mon Sep 17 00:00:00 2001
From: Matthew Bauer <mjbauer95@gmail.com>
Date: Tue, 1 Oct 2019 21:07:07 -0400
Subject: [PATCH] Add libatomic for 32-bit ARM

Fixes #3113
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index a52830b38..96a2065b1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -157,6 +157,11 @@ AX_BOOST_BASE([1.66], [CXXFLAGS="$BOOST_CPPFLAGS $CXXFLAGS"], [AC_MSG_ERROR([Nix
 # ends up with LDFLAGS being empty, so we set it afterwards.
 LDFLAGS="$BOOST_LDFLAGS $LDFLAGS"
 
+# Boost atomic needs GCC libatomic on 32-bit ARM
+case "$host_cpu" in
+  armv5*|armv6*|armv7*) LIBS="-latomic $LIBS"
+esac
+
 
 # Look for OpenSSL, a required dependency.
 PKG_CHECK_MODULES([OPENSSL], [libcrypto], [CXXFLAGS="$OPENSSL_CFLAGS $CXXFLAGS"])