RIOT/boards/x86-multiboot-common/Makefile.include

ifeq (, $(NEWLIB_BASE))
  NEWLIB_BASE := $(RIOTBASE)/toolchain/x86/i586-none-elf

  ifneq (0, $(shell test -e "$(NEWLIB_BASE)/lib/libc.a" && echo $$?))
    NEWLIB_PRECOMPILED_NAME := i586-newlib_2.1.0_tlsf-1254.tar.bz2
    NEWLIB_PRECOMPILED := http://download.riot-os.org/$(NEWLIB_PRECOMPILED_NAME)

    $(warning "Precompiled newlib is missing in $(NEWLIB_BASE)")
    $(warning "Downloading from $(NEWLIB_PRECOMPILED)")

    ifeq (0, $(shell which wget 2>&1 > /dev/null ; echo $$?))
      DOWNLOAD_TO_STDOUT := $(shell which wget) -qO-
    else
      ifeq (0, $(shell which curl 2>&1 > /dev/null ; echo $$?))
        DOWNLOAD_TO_STDOUT := $(shell which curl) -s
      else
        $(error "Neither wget nor curl is installed!")
      endif
    endif

    $(shell cd $(RIOTBASE) && $(DOWNLOAD_TO_STDOUT) "$(NEWLIB_PRECOMPILED)" | tar xj)
  endif
endif

ifeq (,$(BUILD_INCLUDE_BASE))
  GCC_BUILD_TRIPLET ?= $(shell gcc -dumpmachine)
  GCC_BUILD_VERSION ?= $(shell gcc -dumpversion)
  BUILD_INCLUDE_BASE = /usr/lib/gcc/$(GCC_BUILD_TRIPLET)/$(GCC_BUILD_VERSION)

  ifeq (,$(shell echo $(GCC_BUILD_TRIPLET) | sed -e 's,-.*,,' | grep -e '\(x\|i[3-7]\)86'))
    $(warning Your build machine is a(n) $(GCC_BUILD_TRIPLET).)
    $(warning Since this is not IA32 compatible, you must set BUILD_INCLUDE_BASE explicitly!)
  endif
endif

export INCLUDES += -isystem $(BUILD_INCLUDE_BASE)/include \
                   -isystem $(NEWLIB_BASE)/include \
                   -isystem $(NEWLIB_BASE)/sys-include \
                   -isystem $(BUILD_INCLUDE_BASE)/include-fixed \
                   -I$(RIOTBOARD)/x86-multiboot-common/include
export CPU = x86

# toolchain config
export CC ?= $(PREFIX)gcc
export AR ?= $(PREFIX)ar
export AS ?= $(PREFIX)as
export RANLIB ?= $(PREFIX)ranlib
export LINK ?= $(RIOTBASE)/boards/x86-multiboot-common/dist/link $(PREFIX)gcc
export SIZE ?= $(PREFIX)size
export OBJCOPY ?= $(PREFIX)objcopy

export CFLAGS += -m32 -mfpmath=387 -ffreestanding -nostdlib -nostdinc -fno-builtin
export OFLAGS = -O binary

LINKFLAGS += -m32 -nostdlib -nostdinc -nostartfiles -nodefaultlibs \
             --prefix=$(NEWLIB_BASE) \
             -Wl,-rpath,$(NEWLIB_BASE)/lib \
             -T$(RIOTBASE)/boards/x86-multiboot-common/linker.ld
UNDEF += $(BINDIR)x86-multiboot-common_base/startup.o

BASELIBS += $(NEWLIB_BASE)/lib/libc.a \
            $(NEWLIB_BASE)/lib/libm.a

all:

all-debug: export CFLAGS += -ggdb3 -O0
all-debug: all

ifeq (, $(filter all-debug, $(MAKECMDGOALS)))
  CFLAGS += -Os -ffunction-sections -fdata-sections
  LINKFLAGS += -Wl,--gc-sections
endif