| # |
| # (C) Copyright 2000-2006 |
| # Wolfgang Denk, DENX Software Engineering, wd@denx.de. |
| # |
| # See file CREDITS for list of people who contributed to this |
| # project. |
| # |
| # This program is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU General Public License as |
| # published by the Free Software Foundation; either version 2 of |
| # the License, or (at your option) any later version. |
| # |
| # This program is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| # GNU General Public License for more details. |
| # |
| # You should have received a copy of the GNU General Public License |
| # along with this program; if not, write to the Free Software |
| # Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| # MA 02111-1307 USA |
| # |
| |
| ######################################################################### |
| |
| ifneq ($(OBJTREE),$(SRCTREE)) |
| ifeq ($(CURDIR),$(SRCTREE)) |
| dir := |
| else |
| dir := $(subst $(SRCTREE)/,,$(CURDIR)) |
| endif |
| |
| obj := $(if $(dir),$(OBJTREE)/$(dir)/,$(OBJTREE)/) |
| src := $(if $(dir),$(SRCTREE)/$(dir)/,$(SRCTREE)/) |
| |
| $(shell mkdir -p $(obj)) |
| else |
| obj := |
| src := |
| endif |
| |
| # clean the slate ... |
| PLATFORM_RELFLAGS = |
| PLATFORM_CPPFLAGS = |
| PLATFORM_LDFLAGS = |
| |
| ######################################################################### |
| |
| HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer \ |
| $(HOSTCPPFLAGS) |
| HOSTSTRIP = strip |
| |
| # |
| # Mac OS X / Darwin's C preprocessor is Apple specific. It |
| # generates numerous errors and warnings. We want to bypass it |
| # and use GNU C's cpp. To do this we pass the -traditional-cpp |
| # option to the compiler. Note that the -traditional-cpp flag |
| # DOES NOT have the same semantics as GNU C's flag, all it does |
| # is invoke the GNU preprocessor in stock ANSI/ISO C fashion. |
| # |
| # Apple's linker is similar, thanks to the new 2 stage linking |
| # multiple symbol definitions are treated as errors, hence the |
| # -multiply_defined suppress option to turn off this error. |
| # |
| |
| ifeq ($(HOSTOS),darwin) |
| # get major and minor product version (e.g. '10' and '6' for Snow Leopard) |
| DARWIN_MAJOR_VERSION = $(shell sw_vers -productVersion | cut -f 1 -d '.') |
| DARWIN_MINOR_VERSION = $(shell sw_vers -productVersion | cut -f 2 -d '.') |
| |
| os_x_before = $(shell if [ $(DARWIN_MAJOR_VERSION) -le $(1) -a \ |
| $(DARWIN_MINOR_VERSION) -le $(2) ] ; then echo "$(3)"; else echo "$(4)"; fi ;) |
| |
| # Snow Leopards build environment has no longer restrictions as described above |
| HOSTCC = $(call os_x_before, 10, 5, "cc", "gcc") |
| HOSTCFLAGS += $(call os_x_before, 10, 4, "-traditional-cpp") |
| HOSTLDFLAGS += $(call os_x_before, 10, 5, "-multiply_defined suppress") |
| else |
| HOSTCC = gcc |
| endif |
| |
| ifeq ($(HOSTOS),cygwin) |
| HOSTCFLAGS += -ansi |
| endif |
| |
| # We build some files with extra pedantic flags to try to minimize things |
| # that won't build on some weird host compiler -- though there are lots of |
| # exceptions for files that aren't complaint. |
| |
| HOSTCFLAGS_NOPED = $(filter-out -pedantic,$(HOSTCFLAGS)) |
| HOSTCFLAGS += -pedantic |
| |
| ######################################################################### |
| # |
| # Option checker (courtesy linux kernel) to ensure |
| # only supported compiler options are used |
| # |
| cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ |
| > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) |
| |
| # |
| # Include the make variables (CC, etc...) |
| # |
| AS = $(CROSS_COMPILE)as |
| LD = $(CROSS_COMPILE)ld |
| CC = $(CROSS_COMPILE)gcc |
| CPP = $(CC) -E |
| AR = $(CROSS_COMPILE)ar |
| NM = $(CROSS_COMPILE)nm |
| STRIP = $(CROSS_COMPILE)strip |
| OBJCOPY = $(CROSS_COMPILE)objcopy |
| OBJDUMP = $(CROSS_COMPILE)objdump |
| RANLIB = $(CROSS_COMPILE)RANLIB |
| |
| ######################################################################### |
| |
| # Load generated board configuration |
| sinclude $(OBJTREE)/include/autoconf.mk |
| |
| # Some architecture config.mk files need to know what CPUDIR is set to, |
| # so calculate CPUDIR before including ARCH/SOC/CPU config.mk files. |
| # Check if arch/$ARCH/cpu/$CPU exists, otherwise assume arch/$ARCH/cpu contains |
| # CPU-specific code. |
| CPUDIR=cpu/$(CPU) |
| ifneq ($(SRCTREE)/$(CPUDIR),$(wildcard $(SRCTREE)/$(CPUDIR))) |
| CPUDIR=cpu |
| endif |
| |
| sinclude $(TOPDIR)/$(ARCH)_config.mk # include architecture dependend rules |
| sinclude $(TOPDIR)/$(CPUDIR)/config.mk # include CPU specific rules |
| |
| ifdef SOC |
| sinclude $(TOPDIR)/$(CPUDIR)/$(SOC)/config.mk # include SoC specific rules |
| endif |
| ifdef VENDOR |
| BOARDDIR = $(VENDOR)/$(BOARD) |
| else |
| BOARDDIR = $(BOARD) |
| endif |
| ifdef BOARD |
| sinclude $(TOPDIR)/board/$(BOARDDIR)/config.mk # include board specific rules |
| endif |
| |
| ######################################################################### |
| |
| ifneq (,$(findstring s,$(MAKEFLAGS))) |
| ARFLAGS = cr |
| else |
| ARFLAGS = crv |
| endif |
| RELFLAGS= $(PLATFORM_RELFLAGS) |
| DBGFLAGS= -g # -DDEBUG |
| OPTFLAGS= -Os #-fomit-frame-pointer |
| ifndef LDSCRIPT |
| #LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/x-load.lds.debug |
| LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/x-load.lds |
| endif |
| OBJCFLAGS += --gap-fill=0xff |
| |
| gccincdir := $(shell $(CC) -print-file-name=include) |
| |
| CPPFLAGS := $(DBGFLAGS) $(OPTFLAGS) $(RELFLAGS) \ |
| -D__KERNEL__ |
| ifneq ($(TEXT_BASE),) |
| CPPFLAGS += -DTEXT_BASE=$(TEXT_BASE) |
| endif |
| |
| ifneq ($(STACK_BASE),) |
| CPPFLAGS += -DSTACK_BASE=$(STACK_BASE) |
| endif |
| |
| ifneq ($(RESET_VECTOR_ADDRESS),) |
| CPPFLAGS += -DRESET_VECTOR_ADDRESS=$(RESET_VECTOR_ADDRESS) |
| endif |
| |
| ifneq ($(OBJTREE),$(SRCTREE)) |
| CPPFLAGS += -I$(OBJTREE)/include2 -I$(OBJTREE)/include |
| endif |
| |
| CPPFLAGS += -I$(TOPDIR)/include |
| CPPFLAGS += -fno-builtin -ffreestanding -nostdinc \ |
| -isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS) |
| |
| ifdef BUILD_TAG |
| CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes \ |
| -DBUILD_TAG='"$(BUILD_TAG)"' |
| else |
| CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes |
| endif |
| |
| CFLAGS += $(call cc-option,-fno-stack-protector) |
| |
| # $(CPPFLAGS) sets -g, which causes gcc to pass a suitable -g<format> |
| # option to the assembler. |
| AFLAGS_DEBUG := |
| |
| AFLAGS_DEBUG := -Wa,-gstabs |
| AFLAGS := $(AFLAGS_DEBUG) -D__ASSEMBLY__ $(CPPFLAGS) |
| |
| LDFLAGS += -Bstatic -T $(obj)x-load.lds $(PLATFORM_LDFLAGS) |
| ifneq ($(TEXT_BASE),) |
| LDFLAGS += -Ttext $(TEXT_BASE) |
| endif |
| |
| # Location of a usable BFD library, where we define "usable" as |
| # "built for ${HOST}, supports ${TARGET}". Sensible values are |
| # - When cross-compiling: the root of the cross-environment |
| # - Linux/ppc (native): /usr |
| # - NetBSD/ppc (native): you lose ... (must extract these from the |
| # binutils build directory, plus the native and U-Boot include |
| # files don't like each other) |
| # |
| # So far, this is used only by tools/gdb/Makefile. |
| |
| ifeq ($(HOSTOS),darwin) |
| BFD_ROOT_DIR = /usr/local/tools |
| else |
| ifeq ($(HOSTARCH),$(ARCH)) |
| # native |
| BFD_ROOT_DIR = /usr |
| else |
| #BFD_ROOT_DIR = /LinuxPPC/CDK # Linux/i386 |
| #BFD_ROOT_DIR = /usr/pkg/cross # NetBSD/i386 |
| BFD_ROOT_DIR = /opt/powerpc |
| endif |
| endif |
| |
| ######################################################################### |
| |
| export HOSTCC HOSTCFLAGS HOSTLDFLAGS PEDCFLAGS HOSTSTRIP CROSS_COMPILE \ |
| AS LD CC CPP AR NM STRIP OBJCOPY OBJDUMP MAKE |
| export TEXT_BASE PLATFORM_CPPFLAGS PLATFORM_RELFLAGS CPPFLAGS CFLAGS AFLAGS |
| |
| ######################################################################### |
| |
| # Allow boards to use custom optimize flags on a per dir/file basis |
| BCURDIR = $(subst $(SRCTREE)/,,$(CURDIR:$(obj)%=%)) |
| $(obj)%.s: %.S |
| $(CPP) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \ |
| -o $@ $< |
| $(obj)%.o: %.S |
| $(CC) $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR)) \ |
| -o $@ $< -c |
| $(obj)%.o: %.c |
| $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \ |
| -o $@ $< -c |
| $(obj)%.i: %.c |
| $(CPP) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \ |
| -o $@ $< -c |
| $(obj)%.s: %.c |
| $(CC) $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR)) \ |
| -o $@ $< -c -S |
| |
| ######################################################################### |