termux-packages/packages/qalc/util.cc.patch

--- ../libqalculate-2.0.0/libqalculate/util.cc	2017-08-27 20:37:20.000000000 +0200
+++ ./libqalculate/util.cc	2017-08-30 21:33:31.235484528 +0200
@@ -771,8 +771,8 @@
 }
 
 void Thread::enableAsynchronousCancel() {
-	pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
-	pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
+	//pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
+	//pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
 }
 
 void *Thread::doRun(void *data) {
@@ -795,7 +795,8 @@
 
 bool Thread::cancel() {
 	if(!running) return true;
-	running = pthread_cancel(m_thread) != 0;
+	//running = pthread_cancel(m_thread) != 0;
+	running = pthread_kill(m_thread, 0) != 0;
 	return !running;
 }