Some old version of Linux don't provide the SIOCGSKNS ioctl in linux/sockios.h. 
In this case, attempting to build test_mkfds produces an error. Suppress building 
of test_mkfds.
Index: util-linux-2.39.2/meson.build
===================================================================
--- util-linux-2.39.2.orig/meson.build
+++ util-linux-2.39.2/meson.build
@@ -3288,11 +3288,14 @@ exe = executable(
 exes += exe
 
 if LINUX
-  exe = executable(
-    'test_mkfds',
-    'tests/helpers/test_mkfds.c',
-    include_directories : includes)
-  exes += exe
+  have = cc.has_header_symbol('linux/sockios.h', 'SIOCGSKNS')
+  if have
+    exe = executable(
+      'test_mkfds',
+      'tests/helpers/test_mkfds.c',
+      include_directories : includes)
+    exes += exe
+  endif
 endif
 
 exe = executable(