From 6c99c7cb0b697057992d25ccafc1ed61d5269013 Mon Sep 17 00:00:00 2001
From: Thomas Nagy <tnagy@waf.io>
Date: Sat, 2 May 2020 21:04:04 +0200
Subject: [PATCH] Add a configuration test for pthread detection #2264

---
 waflib/extras/pthread.py | 81 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 waflib/extras/pthread.py

diff --git a/waflib/extras/pthread.py b/waflib/extras/pthread.py
new file mode 100644
index 00000000..bc100297
--- /dev/null
+++ b/waflib/extras/pthread.py
@@ -0,0 +1,81 @@
+#! /usr/bin/env python
+# encoding: UTF-8
+# Thomas Nagy 2020 (ita)
+
+from waflib import Utils
+from waflib.Configure import conf
+
+PTHREAD_CHECK = '''
+#include <pthread.h>
+
+static void* fun(void* params) {
+    return NULL;
+}
+
+int main() {
+    pthread_t thread;
+    pthread_create(&thread, NULL, &fun, NULL);
+    pthread_join(thread, NULL);
+}
+'''
+
+@conf
+def check_pthreads(self, mode=None):
+	if not mode:
+		mode = 'cxx' if self.env.CXX else 'c'
+
+	if Utils.unversioned_sys_platform() == 'sunos':
+		flags = ['-pthreads', '-lpthread', '-mt', '-pthread']
+	else:
+		flags = ['', '-lpthreads', '-Kthread', '-kthread', '-llthread', '-pthread', '-pthreads', '-mthreads', '-lpthread', '--thread-safe', '-mt']
+
+	features = mode
+	for flag in flags:
+		self.env.stash()
+
+		self.env[mode.upper() + 'FLAGS_PTHREAD'] = [flag]
+
+		if flag:
+			msg = ' -> Trying pthread compilation flag %s' % flag
+			okmsg = 'needs %s' % flag
+		else:
+			msg = 'Checking if a pthread flag is necessary for compiling'
+			okmsg = 'None'
+
+		try:
+			self.check(features=features, msg=msg, okmsg=okmsg, use='PTHREAD', fragment=PTHREAD_CHECK)
+		except self.errors.ConfigurationError:
+			self.env.revert()
+			continue
+		else:
+			break
+	else:
+		self.fatal('Could not find a suitable pthreads flag for compiling')
+
+	features = '%s %sprogram' % (mode, mode)
+	for flag in flags:
+		self.env.stash()
+
+		self.env.LINKFLAGS_PTHREAD = [flag]
+
+		if flag:
+			msg = ' -> Trying pthread link flag %s' % flag
+			okmsg = 'needs %s' % flag
+		else:
+			msg = 'Checking if a pthread flag is necessary for linking'
+			okmsg = 'None'
+
+		try:
+			self.check(features=features, msg=msg, okmsg=okmsg, use='PTHREAD', fragment=PTHREAD_CHECK)
+		except self.errors.ConfigurationError:
+			self.env.revert()
+			continue
+		else:
+			break
+	else:
+		self.fatal('Could not find a suitable pthreads flag for linking')
+
+
+def configure(self):
+	self.check_pthreads()
+