Use <string.h> & <3ds/exheader.h>, fix some bugs, etc.

also fix all warnings and use -Werror

arm11/Makefile

@@ -28,8 +28,8 @@ INCLUDES	:=	include include/svc
 ARCH	:=	-march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft
 DEFINES :=	-DARM11 -D_3DS
 
-CFLAGS	:=	-g -std=gnu11 -Wall -Wextra -O2 -mword-relocations \
-			-fomit-frame-pointer -ffunction-sections -fdata-sections -fno-builtin \
+CFLAGS	:=	-g -std=gnu11 -Wall -Wextra -Werror -O2 -mword-relocations \
+			-fomit-frame-pointer -ffunction-sections -fdata-sections \
 			-Wno-main -fno-builtin $(ARCH) $(DEFINES)
 
 CFLAGS	+=	$(INCLUDE)

arm11/source/start.s

@@ -58,7 +58,7 @@ start:
     mov r1, #0
     ldr r2, =__bss_end__
     sub r2, r0
-    bl memset32
+    bl memset
 
     @ Call the init array
     bl __libc_init_array