From 88613805905edc8e3fa39326813f6f7220a14ad4 Mon Sep 17 00:00:00 2001
From: Kenichi Ishigaki <ishigaki@cpan.org>
Date: Sat, 17 Apr 2021 18:37:44 +0900
Subject: [PATCH] Set THREADSAFE=0 only if usethreads is undef and pthreads is
 not linked

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

diff --git a/Makefile.PL b/Makefile.PL
index aa2244c..548ca38 100644
--- a/Makefile.PL
+++ b/Makefile.PL
@@ -262,7 +262,7 @@ if ( $^O eq 'cygwin') {
 if ( $Config{d_usleep} || $Config{osname} =~ m/linux/ ) {
 	push @CC_DEFINE, '-DHAVE_USLEEP=1';
 }
-unless ( $Config{usethreads} ) {
+if ( !$Config{usethreads} and $Config{libs} !~ /pthreads/ ) {
 	push @CC_DEFINE, '-DTHREADSAFE=0';
 }
 if ($^O eq 'hpux' and $Config{osvers} <= 10.20) {