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https://github.com/brain-hackers/u-boot-brain
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139e1875d3
It appears that with recent versions of GCC the explicit
"-mhard-float" command line option takes precedence over the
``asm(".gnu_attribute 4, 2");'' in the source file, so this no longer
helps to avoid the warnings we get when linking code that uses FP
instructions with other code that was built using soft-float.
We can remove the ".gnu_attribute" (which appears to carry no other
information, at least so far) from the object files, but we also have
to make sure we don't pull in the __gcc_qsub() and __gcc_qmul()
functions from the standard libgcc, as these would again "infect" our
linking. We copy this code from:
gcc-4.2.2/gcc/config/rs6000/darwin-ldouble.c
This old version was chosen because it was still available under a
compatible license (GCC v2+). The file was stripped down to the
needed parts, and reformatted so it passes checkpatch with only one
warning (do not add new typedefs).
Signed-off-by: Wolfgang Denk <wd@denx.de>
Cc: Kumar Gala <galak@kernel.crashing.org>
Cc: Stefan Roese <sr@denx.de>
Cc: Andy Fleming <afleming@gmail.com>
Cc: Kim Phillips <kim.phillips@freescale.com>
Tested-by: Stefan Roese <sr@denx.de>
Tested-by: Anatolij Gustschin <agust@denx.de>
47 lines
1.5 KiB
Makefile
47 lines
1.5 KiB
Makefile
#
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# (C) Copyright 2007
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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 $(TOPDIR)/config.mk
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LIB = libpost$(ARCH)fpu.o
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COBJS-$(CONFIG_HAS_POST) += 20001122-1.o
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COBJS-$(CONFIG_HAS_POST) += 20010114-2.o
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COBJS-$(CONFIG_HAS_POST) += 20010226-1.o
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COBJS-$(CONFIG_HAS_POST) += 980619-1.o
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COBJS-$(CONFIG_HAS_POST) += acc1.o
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COBJS-$(CONFIG_HAS_POST) += compare-fp-1.o
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COBJS-$(CONFIG_HAS_POST) += fpu.o
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COBJS-$(CONFIG_HAS_POST) += mul-subnormal-single-1.o
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COBJS-$(CONFIG_HAS_POST) += darwin-ldouble.o
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include $(TOPDIR)/post/rules.mk
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CFLAGS := $(shell echo $(CFLAGS) | sed s/-msoft-float//)
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CFLAGS += -mhard-float -fkeep-inline-functions
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$(obj)%.o: %.c
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$(CC) $(ALL_CFLAGS) -o $@.fp $< -c
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$(OBJCOPY) -R .gnu.attributes $@.fp $@
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rm -f $@.fp
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