include stdlib.h for free and strtol
silence format warning

--- a/lib/ext2.c
+++ b/lib/ext2.c
@@ -41,6 +41,7 @@
 #include "asprintf.h"
 #endif
 #include <stdio.h>
+#include <stdlib.h>
 #include <unistd.h>
 #include "xar.h"
 #include "arcmod.h"
--- a/lib/ea.c
+++ a/lib/ea.c
@@ -67,7 +67,7 @@
 	xar_prop_setvalue(XAR_EA(ret)->prop, NULL);
 	XAR_PROP(XAR_EA(ret)->prop)->attrs = xar_attr_new();
 	XAR_ATTR(XAR_PROP(XAR_EA(ret)->prop)->attrs)->key = strdup("id");
-	asprintf((char **)&XAR_ATTR(XAR_PROP(XAR_EA(ret)->prop)->attrs)->value, "%lld", XAR_FILE(f)->nexteaid++);
+	asprintf((char **)&XAR_ATTR(XAR_PROP(XAR_EA(ret)->prop)->attrs)->value, PRId64, XAR_FILE(f)->nexteaid++);
 
 	xar_prop_pset(f, XAR_EA(ret)->prop, "name", name);