[PATCH 03/18] Set -msoft-float and assembler target options in the bootwrapper.

[Scott Wood]

Without -msoft-float, floating point state saving code can be executed
(at least with certain buggy versions of GCC, which don't clear bit 6 of
CR before calling a varargs function with no varargs parameters).

Without the assembler target option, the assembler will use the old
dedicated mftb/mftbu instructions, rather than mfspr.  This causes the
boot to hang on e500, which doesn't have the dedicated instructions.

Signed-off-by: Scott Wood <scottwood at freescale.com>
---
 arch/powerpc/Makefile      |    1 +
 arch/powerpc/boot/Makefile |    3 ++-
 2 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index a00fe72..2309cdf 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -118,6 +118,7 @@ cpu-as-$(CONFIG_E200)		+= -Wa,-me200
 
 AFLAGS += $(cpu-as-y)
 CFLAGS += $(cpu-as-y)
+export cpu-as-y
 
 head-y				:= arch/powerpc/kernel/head_32.o
 head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 906b166..e95c1b0 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -24,7 +24,8 @@ all: $(obj)/zImage
 
 HOSTCC		:= gcc
 BOOTCFLAGS	:= $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
-		   $(shell $(CROSS32CC) -print-file-name=include) -fPIC
+		   $(shell $(CROSS32CC) -print-file-name=include) -fPIC \
+		   $(cpu-as-y) -msoft-float
 BOOTAFLAGS	:= -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
 
 ifeq ($(call cc-option-yn, -fstack-protector),y)
-- 
1.4.4