How to compile arduino core library with makefile?

Question

I want to create library files (.a) of the arduino core library, eventually also the other libraries (SPI, ...), with a makefile, but I can't get it to work!

This is my makefile:

CC=avr-gcc
CPP=avr-g++
MCU=-mmcu=atmega328p
CPU_SPEED=-DF_CPU=16000000UL
CFLAGS=$(MCU) $(CPU_SPEED) -g2 -gstabs -Os -Wall \
-ffunction-sections -fdata-sections -fno-exceptions
INCLUDE=-I./arduinoCORE

CFILES=$(wildcard ./arduinoCORE/*.c)
CPPFILES=$(wildcard ./arduinoCORE/*.cpp)

OBJ=$(CFILES:.c=.o) $(CPPFILES:.cpp=.o)

default: $(OBJ)
    avr-ar -r libarduinoUNO.a $^

%.o : %.c
    $(CC) $< $(CFLAGS) -c -o $@

%.o : %.cpp
    $(CPP) $< $(CFLAGS) -c -o $@

(all header and source files are in arduinoCORE; even pins_arduino.h)

After $ make in directory above arduinoCORE I get this error message:

avr-g++ arduinoCORE/CDC.cpp -mmcu=atmega328p -DF_CPU=16000000UL -g2 -gstabs -Os -Wall -ffunction-sections -fdata-sections -fno-exceptions -c -o arduinoCORE/CDC.o
In file included from arduinoCORE/Print.h:27:0,
                 from arduinoCORE/Stream.h:26,
                 from arduinoCORE/HardwareSerial.h:28,
                 from arduinoCORE/Arduino.h:193,
                 from arduinoCORE/Platform.h:15,
                 from arduinoCORE/CDC.cpp:19:
arduinoCORE/Printable.h:23:17: fatal error: new.h: No such file or directory
 #include <new.h>
                 ^
compilation terminated.

make: *** [arduinoCORE/CDC.o] Error 1

The problem is, that new.h is actually in arduinoCORE! Does anyone know how to manage this?

You don't actually want to do it this way. Each architecture that Arduino uses has multiple subarchitectures, and each need the libraries built slightly differently. — Ignacio Vazquez-Abrams, Aug 18 '15 at 05:56
For the moment I want to compile only for atmega328p, if that's the problem. — Fabio, Aug 18 '15 at 12:30
Rebuild for each subarch into a separate directory, and then add the appropriate directory via `-L` when linking. — Ignacio Vazquez-Abrams, Aug 18 '15 at 12:47
Actually I don't want to link the files now, I only want to compile them to object files and then archive them. Later I want to use this archive as an argument for the linker with programs I write (adding the container directory with the `-L` flag and the library itself with `-l`). — Fabio, Aug 18 '15 at 17:16
Being still more concise: I want to create a libXXX.a file of the Arduino core library, so that after compiling a sketch I can just link it with this file. (if I have understood well: you need the library source files (.c and .cpp) for compiling a sketch and a compiled library archive file (.a) for linking it) — Fabio, Aug 18 '15 at 18:20

garvamel · Accepted Answer · 2016-07-12T01:20:51.533

I had a different error with your code. It displayed Arduino.h as not being present. I fixed it after actually adding the INCLUDE variable to CFLAGS and CPPFLAGS (yours was defined but not added).

I also used CFLAGS and CPPFLAGS as per the Arduino Specification. The code is:

CC=avr-gcc
CPP=avr-g++
MCU=-mmcu=atmega328p
CPU_SPEED=-DF_CPU=16000000UL
INCLUDE=-I./

CFLAGS = -c -g -Os -w -ffunction-sections -fdata-sections -MMD $(MCU) $(CPU_SPEED) $(INCLUDE) 
CPPFLAGS = -c -g -Os -w -fno-exceptions -ffunction-sections -fdata-sections -fno-threadsafe-statics -MMD $(MCU) $(CPU_SPEED)  $(INCLUDE)

CFILES=$(wildcard ./*.c)
CPPFILES=$(wildcard ./*.cpp)

OBJ=$(CFILES:.c=.o) $(CPPFILES:.cpp=.o)

default: $(OBJ)
    avr-ar rcs core.a $^

%.o : %.c
    $(CC) $< $(CFLAGS) -c -o $@

%.o : %.cpp
    $(CPP) $< $(CPPFLAGS) -c -o $@

Which creates the archive successfully (not tested, just created).

How to compile arduino core library with makefile?

1 Answers1