Add a "fork" of musl as //fusl.

fusl/src/env/__stack_chk_fail.c

+#include <string.h>
+#include <stdint.h>
+#include "pthread_impl.h"
+
+uintptr_t __stack_chk_guard;
+
+void __init_ssp(void *entropy)
+{
+        if (entropy) memcpy(&__stack_chk_guard, entropy, sizeof(uintptr_t));
+        else __stack_chk_guard = (uintptr_t)&__stack_chk_guard * 1103515245;
+
+        __pthread_self()->CANARY = __stack_chk_guard;
+}
+
+void __stack_chk_fail(void)
+{
+        a_crash();
+}
+
+__attribute__((__visibility__("hidden")))
+void __stack_chk_fail_local(void);
+
+weak_alias(__stack_chk_fail, __stack_chk_fail_local);