Thomas reported that build of x86_64 kernel was failing for him. He is using 32bit tool chain. Problem is that while compiling purgatory, I have not specified -m64 flag. And 32bit tool chain must be assuming -m32 by default. Following is error message. (mini) [~/work/linux-2.6] make scripts/kconfig/conf --silentoldconfig Kconfig CHK include/config/kernel.release UPD include/config/kernel.release CHK include/generated/uapi/linux/version.h CHK include/generated/utsrelease.h UPD include/generated/utsrelease.h CC arch/x86/purgatory/purgatory.o arch/x86/purgatory/purgatory.c:1:0: error: code model 'large' not supported in the 32 bit mode Fix it by explicitly passing appropriate -m64/-m32 build flag for purgatory.
Unified · Split
| @@ -11,6 +11,7 @@ targets += purgatory.ro · 10 unmodified lines | |||
| 11 | # sure how to relocate those. Like kexec-tools, use custom flags. | 11 | # sure how to relocate those. Like kexec-tools, use custom flags. |
| 12 | 12 | ||
| 13 | KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large | 13 | KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large |
| 14 | KBUILD_CFLAGS += -m$(BITS) | ||
| 14 | 15 | ||
| 15 | $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE | 16 | $(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE |
| 16 | $(call if_changed,ld) | 17 | $(call if_changed,ld) |