This test requires pthreads, so, I've copied bits from another testcase that uses -pthreads in the same way.
Checked it in.
diff --git a/gcc/testsuite/gcc.dg/pr53849.c b/gcc/testsuite/gcc.dg/pr53849.c index 3b67010..eddc45f 100644 --- a/gcc/testsuite/gcc.dg/pr53849.c +++ b/gcc/testsuite/gcc.dg/pr53849.c @@ -1,4 +1,5 @@ /* { dg-do compile } */ +/* { dg-require-effective-target pthread } */ /* { dg-options "-O2 -ftree-parallelize-loops=2 -fno-tree-loop-im" } */ extern int *b, *e[8], d;