ESP32 disable C++ exceptions and RTTI

Author: rojer

platforms/esp32/Makefile.build

@@ -139,7 +139,8 @@ CFLAGS += -Wall -Werror -pipe -mtext-section-literals \
           -DMGOS_ROOT_FS_TYPE='$(MGOS_ROOT_FS_TYPE)' \
           -DMGOS_ROOT_FS_OPTS='$(MGOS_ROOT_FS_OPTS)' \
           -DMGOS_ROOT_FS_EXTRACT='$(MGOS_ROOT_FS_EXTRACT)'
-CXXFLAGS += -pipe -fno-jump-tables -fno-tree-switch-conversion \
+CXXFLAGS += -pipe -fno-exceptions -fno-rtti \
+            -fno-jump-tables -fno-tree-switch-conversion \
             $(APP_CXXFLAGS) $(addprefix -I ,$(APP_INCLUDES))
 
 # Settings for the ESP-IDF build system

platforms/esp32/sdkconfig

@@ -46,3 +46,6 @@ CONFIG_ESP_NETIF_TCPIP_ADAPTER_COMPATIBLE_LAYER=n
 
 # Required to be able to update boot loader.
 CONFIG_SPI_FLASH_DANGEROUS_WRITE_ALLOWED=y
+
+CONFIG_COMPILER_CXX_EXCEPTIONS=n
+CONFIG_COMPILER_CXX_RTTI=n

platforms/esp32/src/esp32_src.mk

@@ -63,17 +63,18 @@ MGOS_OBJS = $(addsuffix .o,$(MGOS_SRCS)) esp32_nsleep100.S.o
 APP_OBJS = $(addsuffix .o,$(APP_SRCS))
 BUILD_INFO_OBJS = $(addsuffix .o,$(notdir $(BUILD_INFO_C)) $(notdir $(MG_BUILD_INFO_C)))
 
-C_CXX_CFLAGS += -DMGOS_APP=\"$(APP)\" -DFW_ARCHITECTURE=$(APP_PLATFORM) \
+C_CXX_CFLAGS += -pipe -DMGOS_APP=\"$(APP)\" -DFW_ARCHITECTURE=$(APP_PLATFORM) \
                 -DMGOS_ESP32 -include mgos_iram.h \
                 $(MG_FEATURES_TINY) -DMG_NET_IF=MG_NET_IF_LWIP_LOW_LEVEL \
                 $(MGOS_FEATURES) -DMGOS_MAX_NUM_UARTS=3 \
                 -DMGOS_DEBUG_UART=$(MGOS_DEBUG_UART) \
                 -DMG_ENABLE_FILESYSTEM \
                 -DMG_ENABLE_DIRECTORY_LISTING \
-                -DMGOS_NUM_HW_TIMERS=4
+                -DMGOS_NUM_HW_TIMERS=4 \
+                -fno-jump-tables -fno-tree-switch-conversion
 
 CFLAGS += $(C_CXX_CFLAGS)
-CXXFLAGS += $(C_CXX_CFLAGS)
+CXXFLAGS += $(C_CXX_CFLAGS) -fno-exceptions -fno-rtti
 
 $(BUILD_INFO_C): $(MGOS_OBJS) $(APP_OBJS)
 	$(call gen_build_info,$@,$(APP_PATH),$(APP_BUILD_ID),$(APP_VERSION),,$(BUILD_INFO_C),$(BUILD_INFO_JSON))