chore: sdk compiles almost w/o warnings?

mk/application.mk

@@ -32,25 +32,27 @@ include $(MKFILES)/sources.mk
 
 # compiler flags
 COMMON_FLAGS := \
-    -mcpu=cortex-m4 -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 \
-    -Os -g2 -w
+    -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 \
+    -Os
 
 CFLAGS := $(COMMON_FLAGS) \
     -DM4 -DCONFIG_PLATFORM_8711B \
     -ffunction-sections -fdata-sections -fomit-frame-pointer \
-    -fno-common -fno-short-enums -std=gnu99 -fsigned-char \
-    -Wno-pointer-sign -Wno-implicit-function-declaration \
-    -Wno-incompatible-pointer-types -Wno-int-conversion
+    -fno-exceptions -fno-unwind-tables -fno-asynchronous-unwind-tables \
+    -fno-builtin -fno-short-enums \
+	-std=gnu99 \
 
 LFLAGS := $(COMMON_FLAGS) \
     --specs=nano.specs -nostartfiles \
-    -Wl,--gc-sections -Wl,--entry=Reset_Handler \
+    -Wl,--gc-sections \
+    -Wl,--entry=Reset_Handler \
     -Wl,--no-enum-size-warning -Wl,--no-wchar-size-warning \
     -Wl,--wrap=malloc -Wl,--wrap=free -Wl,--wrap=realloc \
     -Wl,--wrap=rom_psk_CalcGTK -Wl,--wrap=rom_psk_CalcPTK \
     -Wl,--wrap=CalcMIC -Wl,--wrap=CheckMIC \
     -Wl,--wrap=aes_80211_encrypt -Wl,--wrap=aes_80211_decrypt \
-    -Wl,--wrap=DecGTK
+    -Wl,--wrap=DecGTK \
+    -Wl,--print-memory-usage
 
 # libs
 LIB_DIR := $(SOC_PATH)/misc/bsp/lib/common/GCC