altos/arm: Align data so that gcc 5.4 doesn't do byte-accesses. Add -Wcast-align

[fw/altos] / src / stm / stm32l.h

diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 463125e25f19ebea5472adbd1c0cab57eaa407ff..be1e1d65112c6c47f7b65ee1b3be7bc9934c2472 100644 (file)
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -1961,7 +1961,7 @@ union stm_usb_bdt {
 
 #define STM_USB_BDT_SIZE       8
 
-extern uint8_t stm_usb_sram[];
+extern uint8_t stm_usb_sram[] __attribute__ ((aligned(4)));
 
 struct stm_exti {
        vuint32_t       imr;