commit df4cb2280e32187380520f71bd27ab32252cbc85
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Nov 30 15:39:17 2021 +0100

    elf: Include <stdbool.h> in tst-tls20.c
    
    The test uses the bool type.

diff --git a/elf/tst-tls20.c b/elf/tst-tls20.c
index 18067e6b0a6093f9..200dacb748af21a8 100644
--- a/elf/tst-tls20.c
+++ b/elf/tst-tls20.c
@@ -19,6 +19,7 @@
 #include <array_length.h>
 #include <dlfcn.h>
 #include <pthread.h>
+#include <stdbool.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>