commit 4f4bd9e47ba98ccfeeaa8c600c0b0c8bbabcebb3
Author: Matheus Castanho <msc@linux.ibm.com>
Date:   Fri Dec 4 09:48:56 2020 -0300

    elf: Add missing <stddef.h> header to elf/dl-hwcaps.h
    
    The lack of this header makes size_t unavailable on builds configured
    with --disable-tunables, causing compilation errors.

diff --git a/elf/dl-hwcaps.h b/elf/dl-hwcaps.h
index 769ecab3f886c6c4..9a34088c17e97d7f 100644
--- a/elf/dl-hwcaps.h
+++ b/elf/dl-hwcaps.h
@@ -20,6 +20,7 @@
 #define _DL_HWCAPS_H
 
 #include <stdint.h>
+#include <stddef.h>
 
 #include <elf/dl-tunables.h>