add more warning option, also fix -Wconversion with rp2040

-Wuninitialized, -Wunused,  -Wredundant-decls

hw/bsp/broadcom_32bit/family.mk

@@ -16,7 +16,7 @@ CFLAGS += \
 CROSS_COMPILE = arm-none-eabi-
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \

hw/bsp/broadcom_64bit/family.mk

@@ -15,7 +15,7 @@ CFLAGS += \
 CROSS_COMPILE = aarch64-none-elf-
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 SRC_C += \
 	src/portable/synopsys/dwc2/dcd_dwc2.c \

hw/bsp/imxrt/family.mk

@@ -23,7 +23,7 @@ CFLAGS += -DBOARD_TUH_RHPORT=$(BOARD_TUH_RHPORT)
 endif
 
 # mcu driver cause following warnings
-CFLAGS += -Wno-error=unused-parameter -Wno-error=implicit-fallthrough=
+CFLAGS += -Wno-error=unused-parameter -Wno-error=implicit-fallthrough -Wno-error=redundant-decls
 
 MCU_DIR = $(SDK_DIR)/devices/$(MCU_VARIANT)
 

hw/bsp/mm32/boards/mm32f327x_mb39/mm32f327x_mb39.c

@@ -52,7 +52,6 @@ void USB_DeviceClockInit (void)
 //--------------------------------------------------------------------+
 // LED
 
-void board_led_write (bool state);
 extern u32 SystemCoreClock;
 const int baudrate = 115200;
 

hw/bsp/nrf/family.mk

@@ -16,6 +16,9 @@ CFLAGS += \
 # suppress warning caused by vendor mcu driver
 CFLAGS += -Wno-error=undef -Wno-error=unused-parameter -Wno-error=cast-align -Wno-error=cast-qual
 
+# warning caused by dcd_nrf5x.c due to include of usbd.h and re-declare of dcd_int_handler()
+CFLAGS += -Wno-error=redundant-decls
+
 # All source paths should be relative to the top level.
 LD_FILE ?= hw/bsp/nrf/boards/$(BOARD)/nrf52840_s140_v6.ld
 

hw/bsp/rx/family.mk

@@ -13,6 +13,9 @@ CFLAGS += \
   -mlittle-endian-data \
   -DSSIZE_MAX=__INT_MAX__
 
+# suppress warning caused by vendor mcu driver
+CFLAGS += -Wno-error=redundant-decls
+
 SRC_C += \
 	src/portable/renesas/usba/dcd_usba.c \
 	src/portable/renesas/usba/hcd_usba.c \

hw/bsp/samd21/family.mk

@@ -13,7 +13,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAMD21
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \

hw/bsp/saml2x/family.mk

@@ -14,7 +14,7 @@ CFLAGS += \
   -DCFG_TUSB_MCU=OPT_MCU_SAML22
 
 # suppress warning caused by vendor mcu driver
-CFLAGS += -Wno-error=cast-qual
+CFLAGS += -Wno-error=cast-qual -Wno-error=redundant-decls
 
 SRC_C += \
 	src/portable/microchip/samd/dcd_samd.c \