linux/tools/build/feature/test-gettid.c

// SPDX-License-Identifier: GPL-2.0
// Copyright (C) 2019, Red Hat Inc, Arnaldo Carvalho de Melo <[email protected]>
#define _GNU_SOURCE
#include <unistd.h>

int main(void)
{
	return gettid();
}

#undef _GNU_SOURCE