https://bugs.gentoo.org/777582
https://src.fedoraproject.org/rpms/sbcl/blob/rawhide/f/sbcl-1.4.14-gcc10.patch
--- a/src/runtime/linux-os.c
+++ b/src/runtime/linux-os.c
@@ -64,7 +64,7 @@ int personality (unsigned long);
 #include <sys/personality.h>
 #endif
 
-size_t os_vm_page_size;
+//size_t os_vm_page_size;
 
 #if defined(LISP_FEATURE_SB_THREAD) && defined(LISP_FEATURE_SB_FUTEX) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX)
 #include <sys/syscall.h>