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3cb42092ff
while we can't just use -U$(SUBARCH), we still need to kill idiotic define (implicit -Di386=1), both for SUBARCH=i386 and SUBARCH=x86/CONFIG_64BIT=n builds. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
61 lines
1.6 KiB
Makefile
61 lines
1.6 KiB
Makefile
core-y += arch/x86/crypto/
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ifeq ($(CONFIG_X86_32),y)
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START := 0x8048000
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LDFLAGS += -m elf_i386
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ELF_ARCH := i386
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ELF_FORMAT := elf32-i386
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CHECKFLAGS += -D__i386__
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KBUILD_CFLAGS += $(call cc-option,-m32)
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KBUILD_AFLAGS += $(call cc-option,-m32)
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LINK-y += $(call cc-option,-m32)
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export LDFLAGS
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LDS_EXTRA := -Ui386
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export LDS_EXTRA
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# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y.
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include $(srctree)/arch/x86/Makefile_32.cpu
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# prevent gcc from keeping the stack 16 byte aligned. Taken from i386.
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cflags-y += $(call cc-option,-mpreferred-stack-boundary=2)
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# Prevent sprintf in nfsd from being converted to strcpy and resulting in
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# an unresolved reference.
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cflags-y += -ffreestanding
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# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use
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# a lot more stack due to the lack of sharing of stacklots. Also, gcc
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# 4.3.0 needs -funit-at-a-time for extern inline functions.
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KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \
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echo $(call cc-option,-fno-unit-at-a-time); \
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else echo $(call cc-option,-funit-at-a-time); fi ;)
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KBUILD_CFLAGS += $(cflags-y)
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else
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START := 0x60000000
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KBUILD_CFLAGS += -fno-builtin -m64
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CHECKFLAGS += -m64 -D__x86_64__
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KBUILD_AFLAGS += -m64
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LDFLAGS += -m elf_x86_64
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KBUILD_CPPFLAGS += -m64
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ELF_ARCH := i386:x86-64
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ELF_FORMAT := elf64-x86-64
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# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example.
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LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64
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LINK-y += -m64
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# Do unit-at-a-time unconditionally on x86_64, following the host
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KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
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endif
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