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https://github.com/AsahiLinux/u-boot
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Many (especially ARM) tool chains seem to come with broken or otherwise unusable (for the purposes of builing U-Boot) run-time support libraries `libgcc.a'. By using the "USE_PRIVATE_LIBGCC" setting we allow to use alternative libraries instead. "USE_PRIVATE_LIBGCC" can either be set as an environment variable in the shell, or as a command line argument when running "make", i. e. $ make USE_PRIVATE_LIBGCC=yes or $ USE_PRIVATE_LIBGCC=yes $ export USE_PRIVATE_LIBGCC $ make The value of "USE_PRIVATE_LIBGCC" is the name of the directory which contains the alternative run-time support library `libgcc.a'. The special value "yes" selects the directory $(OBJTREE)/lib_$(ARCH) . Note that not all architectures provide an alternative `libgcc.a' in their lib_$(ARCH) directories - so far, only ARM does. Signed-off-by: Wolfgang Denk <wd@denx.de> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Cc: Prafulla Wadaskar <prafulla@marvell.com> cc: Stefan Roese <sr@denx.de>
72 lines
1.9 KiB
Makefile
72 lines
1.9 KiB
Makefile
#
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# (C) Copyright 2002-2006
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# Wolfgang Denk, DENX Software Engineering, wd@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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LIB = $(obj)lib$(ARCH).a
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LIBGCC = $(obj)libgcc.a
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GLSOBJS += _ashldi3.o
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GLSOBJS += _ashrdi3.o
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GLSOBJS += _divsi3.o
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GLSOBJS += _modsi3.o
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GLSOBJS += _udivsi3.o
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GLSOBJS += _umodsi3.o
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GLCOBJS += div0.o
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COBJS-y += board.o
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COBJS-y += bootm.o
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COBJS-y += cache.o
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ifndef CONFIG_SYS_NO_CP15_CACHE
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COBJS-y += cache-cp15.o
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endif
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COBJS-y += interrupts.o
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COBJS-y += reset.o
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SRCS := $(GLSOBJS:.o=.S) $(GLCOBJS:.o=.c) \
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$(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
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OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
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LGOBJS := $(addprefix $(obj),$(GLSOBJS)) \
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$(addprefix $(obj),$(GLCOBJS))
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ifdef USE_PRIVATE_LIBGCC
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all: $(LIB) $(LIBGCC)
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else
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all: $(LIB)
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endif
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$(LIB): $(obj).depend $(OBJS)
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$(AR) $(ARFLAGS) $@ $(OBJS)
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$(LIBGCC): $(obj).depend $(LGOBJS)
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$(AR) $(ARFLAGS) $@ $(LGOBJS)
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#########################################################################
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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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