With recent binutils devel, I get the following build failure:
{standard input}: Warning: .gnu_attribute 4,3 requires `softfloat'
LD arch/mips/alchemy/common/built-in.o
mipsel-softfloat-linux-gnu-ld: Warning: arch/mips/alchemy/common/built-in.o uses -msoft-float (set by arch/mips/alchemy/common/prom.o), arch/mips/alchemy/common/sleeper.o uses -mhard-float
This hackish patch "fixes" it, but I'm not sure if this is actually
a binutils problem.
---
arch/mips/Makefile | 2 +-
arch/mips/kernel/r4k_fpu.S | 1 +
arch/mips/kernel/r4k_switch.S | 2 ++
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 9336509..cffbd49 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -88,7 +88,7 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlinuz
# crossformat linking we rely on the elf2ecoff tool for format conversion.
#
cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
-cflags-y += -msoft-float
+cflags-y += -msoft-float -Wa,-msoft-float
LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
KBUILD_AFLAGS_MODULE += -mlong-calls
KBUILD_CFLAGS_MODULE += -mlong-calls
diff --git a/arch/mips/kernel/r4k_fpu.S b/arch/mips/kernel/r4k_fpu.S
index 8352523..10dd5d4 100644
--- a/arch/mips/kernel/r4k_fpu.S
+++ b/arch/mips/kernel/r4k_fpu.S
@@ -31,6 +31,7 @@
.set noreorder
.set arch=r4000
+ .set hardfloat
LEAF(_save_fp_context)
cfc1 t1, fcr31
diff --git a/arch/mips/kernel/r4k_switch.S b/arch/mips/kernel/r4k_switch.S
index 4c4ec18..a030f74 100644
--- a/arch/mips/kernel/r4k_switch.S
+++ b/arch/mips/kernel/r4k_switch.S
@@ -34,6 +34,8 @@
* struct thread_info *next_ti, s32 fp_save)
*/
.align 5
+ .set hardfloat
+
LEAF(resume)
mfc0 t1, CP0_STATUS
LONG_S t1, THREAD_STATUS(a0)
--
2.0.4
