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| author | Wolfgang Denk <wd@denx.de> | 2011-12-22 04:29:41 +0000 |
|---|---|---|
| committer | Wolfgang Denk <wd@denx.de> | 2011-12-23 20:03:55 +0100 |
| commit | 139e1875d3b3dc31a6ea964f6ff3912fed32c4a2 (patch) | |
| tree | 330cc86cb28edde0580c8c17578555400222c9cb /post/lib_powerpc/fpu/Makefile | |
| parent | af44f4b2a56ea3b8f57fb117d4768a57e000ac24 (diff) | |
| download | blackbird-obmc-uboot-139e1875d3b3dc31a6ea964f6ff3912fed32c4a2.tar.gz blackbird-obmc-uboot-139e1875d3b3dc31a6ea964f6ff3912fed32c4a2.zip | |
PPC: fix "Warning: FOO uses hard float, BAR uses soft float".
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>
Diffstat (limited to 'post/lib_powerpc/fpu/Makefile')
| -rw-r--r-- | post/lib_powerpc/fpu/Makefile | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/post/lib_powerpc/fpu/Makefile b/post/lib_powerpc/fpu/Makefile index b97ad6fbc8..5d0e52dc31 100644 --- a/post/lib_powerpc/fpu/Makefile +++ b/post/lib_powerpc/fpu/Makefile @@ -24,10 +24,23 @@ include $(TOPDIR)/config.mk LIB = libpost$(ARCH)fpu.o -COBJS-$(CONFIG_HAS_POST) += fpu.o 20001122-1.o 20010114-2.o 20010226-1.o 980619-1.o -COBJS-$(CONFIG_HAS_POST) += acc1.o compare-fp-1.o mul-subnormal-single-1.o +COBJS-$(CONFIG_HAS_POST) += 20001122-1.o +COBJS-$(CONFIG_HAS_POST) += 20010114-2.o +COBJS-$(CONFIG_HAS_POST) += 20010226-1.o +COBJS-$(CONFIG_HAS_POST) += 980619-1.o +COBJS-$(CONFIG_HAS_POST) += acc1.o +COBJS-$(CONFIG_HAS_POST) += compare-fp-1.o +COBJS-$(CONFIG_HAS_POST) += fpu.o +COBJS-$(CONFIG_HAS_POST) += mul-subnormal-single-1.o + +COBJS-$(CONFIG_HAS_POST) += darwin-ldouble.o include $(TOPDIR)/post/rules.mk CFLAGS := $(shell echo $(CFLAGS) | sed s/-msoft-float//) CFLAGS += -mhard-float -fkeep-inline-functions + +$(obj)%.o: %.c + $(CC) $(ALL_CFLAGS) -o $@.fp $< -c + $(OBJCOPY) -R .gnu.attributes $@.fp $@ + rm -f $@.fp |
