-/* target specific */
-extern int trx_fixup(int fd, const char *name);
-extern int trx_check(int imagefd, const char *mtd, char *buf, int *len);
-
+/* target specific functions */
+extern int trx_fixup(int fd, const char *name) __attribute__ ((weak));
+extern int trx_check(int imagefd, const char *mtd, char *buf, int *len) __attribute__ ((weak));
+extern int mtd_fixtrx(const char *mtd, size_t offset) __attribute__ ((weak));