mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-13 23:02:59 +00:00
767589a7b2
Recent GCC (4.4+) performs out-of-line epilogues in some cases, when optimizing for size. It causes a link error for _restgpr_30_x (and similar) if libgcc is not linked. It actually increases size with very small binaries, due to the fixed size of the out-of-line code, and not having any functions that actually need to restore more than 2 or 3 registers. But I don't see a way to turn it off, other than asking GCC to optimize for speed -- which may also increase size for some boards. Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Kim Phillips <kim.phillips@freescale.com> Acked-by: Wolfgang Denk <wd@denx.de>
114 lines
3.3 KiB
Makefile
114 lines
3.3 KiB
Makefile
#
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# (C) Copyright 2008
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# Stefan Roese, DENX Software Engineering, sr@denx.de.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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include $(TOPDIR)/config.mk
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include $(TOPDIR)/nand_spl/board/$(BOARDDIR)/config.mk
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LDSCRIPT= $(TOPDIR)/nand_spl/board/$(BOARDDIR)/u-boot.lds
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LDFLAGS = -Bstatic -T $(nandobj)u-boot.lds -Ttext $(CONFIG_SYS_TEXT_BASE) $(PLATFORM_LDFLAGS)
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AFLAGS += -DCONFIG_NAND_SPL
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CFLAGS += -DCONFIG_NAND_SPL
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SOBJS := start.o
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SOBJS += init.o
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SOBJS += resetvec.o
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COBJS := ddr2_fixed.o
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COBJS += nand_boot.o
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COBJS += nand_ecc.o
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COBJS += ndfc.o
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SRCS := $(addprefix $(obj),$(SOBJS:.o=.S) $(COBJS:.o=.c))
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OBJS := $(addprefix $(obj),$(SOBJS) $(COBJS))
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__OBJS := $(SOBJS) $(COBJS)
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LNDIR := $(OBJTREE)/nand_spl/board/$(BOARDDIR)
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nandobj := $(OBJTREE)/nand_spl/
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ALL = $(nandobj)u-boot-spl $(nandobj)u-boot-spl.bin $(nandobj)u-boot-spl-16k.bin
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all: $(obj).depend $(ALL)
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$(nandobj)u-boot-spl-16k.bin: $(nandobj)u-boot-spl
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$(OBJCOPY) ${OBJCFLAGS} --pad-to=$(PAD_TO) -O binary $< $@
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$(nandobj)u-boot-spl.bin: $(nandobj)u-boot-spl
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$(OBJCOPY) ${OBJCFLAGS} -O binary $< $@
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$(nandobj)u-boot-spl: $(OBJS) $(nandobj)u-boot.lds
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cd $(LNDIR) && $(LD) $(LDFLAGS) $(__OBJS) $(PLATFORM_LIBS) \
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-Map $(nandobj)u-boot-spl.map \
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-o $(nandobj)u-boot-spl
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$(nandobj)u-boot.lds: $(LDSCRIPT)
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$(CPP) $(CPPFLAGS) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$^ >$@
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# create symbolic links for common files
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# from cpu directory
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$(obj)ndfc.c:
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@rm -f $(obj)ndfc.c
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ln -s $(SRCTREE)/drivers/mtd/nand/ndfc.c $(obj)ndfc.c
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$(obj)resetvec.S:
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@rm -f $(obj)resetvec.S
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ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/resetvec.S $(obj)resetvec.S
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$(obj)start.S:
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@rm -f $(obj)start.S
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ln -s $(SRCTREE)/arch/powerpc/cpu/ppc4xx/start.S $(obj)start.S
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# from board directory
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$(obj)init.S:
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@rm -f $(obj)init.S
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ln -s $(SRCTREE)/board/amcc/canyonlands/init.S $(obj)init.S
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# from nand_spl directory
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$(obj)nand_boot.c:
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@rm -f $(obj)nand_boot.c
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ln -s $(SRCTREE)/nand_spl/nand_boot.c $(obj)nand_boot.c
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# from drivers/mtd/nand directory
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$(obj)nand_ecc.c:
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@rm -f $(obj)nand_ecc.c
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ln -s $(SRCTREE)/drivers/mtd/nand/nand_ecc.c $(obj)nand_ecc.c
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ifneq ($(OBJTREE), $(SRCTREE))
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$(obj)ddr2_fixed.c:
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@rm -f $(obj)ddr2_fixed.c
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ln -s $(SRCTREE)/nand_spl/board/$(BOARDDIR)/ddr2_fixed.c $(obj)ddr2_fixed.c
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endif
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#########################################################################
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$(obj)%.o: $(obj)%.S
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$(CC) $(AFLAGS) -c -o $@ $<
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$(obj)%.o: $(obj)%.c
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$(CC) $(CFLAGS) -c -o $@ $<
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# defines $(obj).depend target
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include $(SRCTREE)/rules.mk
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sinclude $(obj).depend
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#########################################################################
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