esp8266: Disable "strict aliasing" in compiler like in atmel-samd

jepler · dhalbert · commit 1e9a27177c5d · 2018-04-09T22:23:39.000-04:00
This caused a fatal compiler diagnostic after adafruit#750. This compiler flag is already specified in the atmel-samd builds, so it makes sense to do it here for the same reasons.
diff --git a/ports/esp8266/Makefile b/ports/esp8266/Makefile
@@ -48,7 +48,7 @@ CFLAGS_XTENSA = -fsingle-precision-constant -Wdouble-promotion \
 	-Wl,-EL -mlongcalls -mtext-section-literals -mforce-l32 \
 	-DLWIP_OPEN_SRC
 
-CFLAGS = $(INC) -Wall -Wpointer-arith -Werror -std=gnu99 -nostdlib -DUART_OS=$(UART_OS) \
+CFLAGS = $(INC) -Wall -Wpointer-arith -Werror -Wno-strict-aliasing -std=gnu99 -nostdlib -DUART_OS=$(UART_OS) \
 	$(CFLAGS_XTENSA) $(CFLAGS_MOD) $(COPT) $(CFLAGS_EXTRA)
 
 LDSCRIPT = esp8266.ld
