# Hey Emacs, this is a -*- makefile -*-
#
# Copyright (C) 2012-2014 Felix Ruess <felix.ruess@gmail.com>


#
# This is the common Makefile for finding the arm compiler
# for bare metal systems like on the ARM7TDMI, cortex M3/4

PREFIX ?= arm-none-eabi

#
# if gcc can't be found in path, try the paparazzi toolchain in /opt
#
ifeq ($(shell which $(PREFIX)-gcc),)
  ifdef ALLOW_OLD_ARM_MULTILIB_TOOLCHAIN
    PPRZ_TOOLCHAIN=$(shell find -L /opt/paparazzi/arm-multilib -maxdepth 1 -type d -name arm-none-eabi 2>/dev/null | head -n 1)
    ifneq ($(PPRZ_TOOLCHAIN),)
      # set prefix with full path to /opt/paparazzi/arm-multilib toolchain
      PREFIX=$(shell dirname $(PPRZ_TOOLCHAIN))/bin/arm-none-eabi
      TOOLCHAIN_FOUND = 1
    endif
  endif
else
  TOOLCHAIN_FOUND = 1
endif
ifneq ($(TOOLCHAIN_FOUND),1)
  ifneq ($(MAKECMDGOALS),clean)
    $(error Error: arm-none-eabi-gcc cross-compiler not found! Recommended toolchain is https://launchpad.net/gcc-arm-embedded)
  endif
endif

CC    = $(PREFIX)-gcc
CXX   = $(PREFIX)-g++
LD    = $(PREFIX)-g++
AR    = $(PREFIX)-ar
CP    = $(PREFIX)-objcopy
DMP   = $(PREFIX)-objdump
NM    = $(PREFIX)-nm
SIZE  = $(PREFIX)-size
GDB   = $(PREFIX)-gdb
STRIP = $(PREFIX)-strip

# some general commands
RM = rm