mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-05 02:36:39 +09:00
be7e41efda
Remove linker command line options from the SPL makefile that force the inclusion of unreferenced command code from linked object files. As commands are not used in the SPL, these options resulted in an unnecessary increase in the image size, in addition to introducing the possibility of tricky link errors in the case where the command code contained symbols that were not resolved by linking in the limited objects compiled in the SPL build. Signed-off-by: Tyler Olmstead <tyler.j.olmstead@gmail.com> Acked-by: Tom Rini <trini@ti.com>
159 lines
4.6 KiB
Makefile
159 lines
4.6 KiB
Makefile
#
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# (C) Copyright 2000-2011
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# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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#
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# (C) Copyright 2011
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# Daniel Schwierzeck, daniel.schwierzeck@googlemail.com.
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#
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# (C) Copyright 2011
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# Texas Instruments Incorporated - http://www.ti.com/
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# Aneesh V <aneesh@ti.com>
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#
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# This file is released under the terms of GPL v2 and any later version.
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# See the file COPYING in the root directory of the source tree for details.
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#
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# Based on top-level Makefile.
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#
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CONFIG_SPL_BUILD := y
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export CONFIG_SPL_BUILD
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include $(TOPDIR)/config.mk
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# We want the final binaries in this directory
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obj := $(OBJTREE)/spl/
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HAVE_VENDOR_COMMON_LIB = $(if $(wildcard $(SRCTREE)/board/$(VENDOR)/common/Makefile),y,n)
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ifdef CONFIG_SPL_START_S_PATH
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START_PATH := $(subst ",,$(CONFIG_SPL_START_S_PATH))
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else
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START_PATH := $(CPUDIR)
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endif
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START := $(START_PATH)/start.o
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LIBS-y += arch/$(ARCH)/lib/lib$(ARCH).o
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LIBS-y += $(CPUDIR)/lib$(CPU).o
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ifdef SOC
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LIBS-y += $(CPUDIR)/$(SOC)/lib$(SOC).o
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endif
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LIBS-y += board/$(BOARDDIR)/lib$(BOARD).o
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LIBS-$(HAVE_VENDOR_COMMON_LIB) += board/$(VENDOR)/common/lib$(VENDOR).o
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LIBS-$(CONFIG_SPL_LIBCOMMON_SUPPORT) += common/libcommon.o
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LIBS-$(CONFIG_SPL_LIBDISK_SUPPORT) += disk/libdisk.o
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LIBS-$(CONFIG_SPL_I2C_SUPPORT) += drivers/i2c/libi2c.o
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LIBS-$(CONFIG_SPL_GPIO_SUPPORT) += drivers/gpio/libgpio.o
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LIBS-$(CONFIG_SPL_MMC_SUPPORT) += drivers/mmc/libmmc.o
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LIBS-$(CONFIG_SPL_SERIAL_SUPPORT) += drivers/serial/libserial.o
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LIBS-$(CONFIG_SPL_SPI_FLASH_SUPPORT) += drivers/mtd/spi/libspi_flash.o
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LIBS-$(CONFIG_SPL_SPI_SUPPORT) += drivers/spi/libspi.o
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LIBS-$(CONFIG_SPL_FAT_SUPPORT) += fs/fat/libfat.o
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LIBS-$(CONFIG_SPL_LIBGENERIC_SUPPORT) += lib/libgeneric.o
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LIBS-$(CONFIG_SPL_POWER_SUPPORT) += drivers/power/libpower.o
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LIBS-$(CONFIG_SPL_NAND_SUPPORT) += drivers/mtd/nand/libnand.o
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LIBS-$(CONFIG_SPL_ONENAND_SUPPORT) += drivers/mtd/onenand/libonenand.o
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LIBS-$(CONFIG_SPL_DMA_SUPPORT) += drivers/dma/libdma.o
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LIBS-$(CONFIG_SPL_POST_MEM_SUPPORT) += post/drivers/memory.o
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ifneq ($(CONFIG_AM33XX)$(CONFIG_OMAP34XX)$(CONFIG_OMAP44XX)$(CONFIG_OMAP54XX),)
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LIBS-y += $(CPUDIR)/omap-common/libomap-common.o
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endif
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ifeq ($(SOC),tegra20)
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LIBS-y += arch/$(ARCH)/cpu/$(SOC)-common/lib$(SOC)-common.o
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endif
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# Add GCC lib
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ifeq ("$(USE_PRIVATE_LIBGCC)", "yes")
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PLATFORM_LIBGCC = $(SPLTREE)/arch/$(ARCH)/lib/libgcc.o
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PLATFORM_LIBS := $(filter-out %/libgcc.o, $(filter-out -lgcc, $(PLATFORM_LIBS))) $(PLATFORM_LIBGCC)
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endif
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START := $(addprefix $(SPLTREE)/,$(START))
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LIBS := $(addprefix $(SPLTREE)/,$(sort $(LIBS-y)))
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__START := $(subst $(obj),,$(START))
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__LIBS := $(subst $(obj),,$(LIBS))
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# Linker Script
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ifdef CONFIG_SPL_LDSCRIPT
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# need to strip off double quotes
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LDSCRIPT := $(addprefix $(SRCTREE)/,$(subst ",,$(CONFIG_SPL_LDSCRIPT)))
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/board/$(BOARDDIR)/u-boot-spl.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/$(CPUDIR)/u-boot-spl.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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LDSCRIPT := $(TOPDIR)/arch/$(ARCH)/cpu/u-boot.lds
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endif
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ifeq ($(wildcard $(LDSCRIPT)),)
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$(error could not find linker script)
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endif
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# Special flags for CPP when processing the linker script.
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# Pass the version down so we can handle backwards compatibility
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# on the fly.
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LDPPFLAGS += \
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-include $(TOPDIR)/include/u-boot/u-boot.lds.h \
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-include $(OBJTREE)/include/config.h \
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-DCPUDIR=$(CPUDIR) \
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$(shell $(LD) --version | \
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sed -ne 's/GNU ld version \([0-9][0-9]*\)\.\([0-9][0-9]*\).*/-DLD_MAJOR=\1 -DLD_MINOR=\2/p')
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ifdef CONFIG_OMAP
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$(OBJTREE)/MLO: $(obj)u-boot-spl.bin
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$(OBJTREE)/tools/mkimage -T omapimage \
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-a $(CONFIG_SPL_TEXT_BASE) -d $< $@
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endif
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ifdef CONFIG_AM33XX
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$(OBJTREE)/MLO: $(obj)u-boot-spl.bin
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$(OBJTREE)/tools/mkimage -T omapimage \
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-a $(CONFIG_SPL_TEXT_BASE) -d $< $@
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endif
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ALL-y += $(obj)u-boot-spl.bin
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ifdef CONFIG_SAMSUNG
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ALL-y += $(obj)$(BOARD)-spl.bin
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endif
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all: $(ALL-y)
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ifdef CONFIG_SAMSUNG
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$(obj)$(BOARD)-spl.bin: $(obj)u-boot-spl.bin
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$(OBJTREE)/tools/mk$(BOARD)spl \
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$(obj)u-boot-spl.bin $(obj)$(BOARD)-spl.bin
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endif
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$(obj)u-boot-spl.bin: $(obj)u-boot-spl
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$(OBJCOPY) $(OBJCFLAGS) -O binary $< $@
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GEN_UBOOT = \
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cd $(obj) && $(LD) $(LDFLAGS) $(LDFLAGS_$(@F)) $(__START) \
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--start-group $(__LIBS) --end-group $(PLATFORM_LIBS) \
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-Map u-boot-spl.map -o u-boot-spl
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$(obj)u-boot-spl: depend $(START) $(LIBS) $(obj)u-boot-spl.lds
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$(GEN_UBOOT)
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$(START): depend
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$(MAKE) -C $(SRCTREE)/$(START_PATH) $@
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$(LIBS): depend
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$(MAKE) -C $(SRCTREE)$(dir $(subst $(SPLTREE),,$@))
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$(obj)u-boot-spl.lds: $(LDSCRIPT) depend
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$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - < $< > $@
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depend: $(obj).depend
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.PHONY: depend
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk
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