path: root/post/lib_powerpc/fpu/Makefile
diff options
authorWolfgang Denk <>2011-12-22 04:29:41 +0000
committerWolfgang Denk <>2011-12-23 20:03:55 +0100
commit139e1875d3b3dc31a6ea964f6ff3912fed32c4a2 (patch)
tree330cc86cb28edde0580c8c17578555400222c9cb /post/lib_powerpc/fpu/Makefile
parentaf44f4b2a56ea3b8f57fb117d4768a57e000ac24 (diff)
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 <> Cc: Kumar Gala <> Cc: Stefan Roese <> Cc: Andy Fleming <> Cc: Kim Phillips <> Tested-by: Stefan Roese <> Tested-by: Anatolij Gustschin <>
Diffstat (limited to 'post/lib_powerpc/fpu/Makefile')
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 $(TOPDIR)/
LIB = libpost$(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-$(CONFIG_HAS_POST) += compare-fp-1.o
+COBJS-$(CONFIG_HAS_POST) += mul-subnormal-single-1.o
+COBJS-$(CONFIG_HAS_POST) += darwin-ldouble.o
include $(TOPDIR)/post/
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
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