makefile.in

這是一個實時嵌入式作業系統 實作了MCS51 ARM等MCU

# 

GCC_VERSION:=$(strip $(subst ",, $(BR2_GCC_VERSION)))
#"))
TARGET_OPTIMIZATION:=$(strip $(subst ",, $(BR2_TARGET_OPTIMIZATION)))
#"))
EXTRA_GCC_CONFIG_OPTIONS:=$(strip $(subst ",, $(BR2_EXTRA_GCC_CONFIG_OPTIONS)))
#"))
ifeq ($(strip $(subst ",, $(BR2_GCC_IS_SNAP))),y)
#"))
GCC_SNAP_DATE:=$(strip $(subst ",, $(BR2_GCC_SNAP_DATE)))
#"))
else
GCC_SNAP_DATE:=
endif
#")))

ifeq ($(strip $(BR2_GCC_USE_SJLJ_EXCEPTIONS)),y)
GCC_USE_SJLJ_EXCEPTIONS:=--enable-sjlj-exceptions
endif

ifeq ($(BR2_SOFT_FLOAT),y)
# gcc 3.4.x soft float configuration is different than previous versions.
ifeq ($(findstring 3.4.,$(GCC_VERSION)),3.4.)
SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
else
SOFT_FLOAT_CONFIG_OPTION:=--without-float
endif

# again... there must be a better way
ifeq ($(findstring 4.,$(GCC_VERSION)),4.)
SOFT_FLOAT_CONFIG_OPTION:=--with-float=soft
ifeq ($(BR2_SOFT_FLOAT_FP),y)
TARGET_SOFT_FLOAT:=-mfloat-abi=softfp
else # no fp at all
TARGET_SOFT_FLOAT:=-mfloat-abi=soft
endif
else # not gcc-4.x
TARGET_SOFT_FLOAT:=-msoft-float
endif
ARCH_FPU_SUFFIX:=_nofpu
else # no softfloat support
SOFT_FLOAT_CONFIG_OPTION:=
TARGET_SOFT_FLOAT:=
ARCH_FPU_SUFFIX:=
endif

TARGET_GCC_FLAGS= CFLAGS_FOR_TARGET="$(TARGET_CFLAGS) $(TARGET_SOFT_FLOAT)" \
	CXXFLAGS_FOR_TARGET="$(TARGET_CFLAGS) $(TARGET_SOFT_FLOAT)" \
	CFLAGS="$(TARGET_CFLAGS) $(TARGET_SOFT_FLOAT)" \
	BOOT_CFLAGS="$(TARGET_CFLAGS) $(TARGET_SOFT_FLOAT)"

ifeq ($(strip $(BR2_PACKAGE_GCC_TARGET)),y)
# pull in config opts from the user
EXTRA_TARGET_GCC_CONFIG_OPTIONS:=$(strip $(subst ",, $(BR2_EXTRA_TARGET_GCC_CONFIG_OPTIONS)))
#"))

ifeq ($(BR2_PREFER_IMA),y)
# >= 4.x
ifneq ($(findstring 3.,$(GCC_VERSION)),3.)
EXTRA_TARGET_GCC_CONFIG_OPTIONS+=--enable-intermodule
endif
endif # BR2_PREFER_IMA=y

TARGETS+=gcc_target
endif