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| author | Al Viro | 2011-08-18 21:06:29 +0200 |
|---|---|---|
| committer | Richard Weinberger | 2011-11-02 14:15:04 +0100 |
| commit | 7bbe7204e93734fe79d8aac3e08a7cb4624b5004 (patch) | |
| tree | aef04472a8f1fa0e6cc43916b8f9165bceb753a0 /arch/um/Makefile-x86 | |
| parent | um: trim detritus from Makefile-i386 (diff) | |
| download | kernel-qcow2-linux-7bbe7204e93734fe79d8aac3e08a7cb4624b5004.tar.gz kernel-qcow2-linux-7bbe7204e93734fe79d8aac3e08a7cb4624b5004.tar.xz kernel-qcow2-linux-7bbe7204e93734fe79d8aac3e08a7cb4624b5004.zip | |
um: merge Makefile-{i386,x86_64}
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/Makefile-x86')
| -rw-r--r-- | arch/um/Makefile-x86 | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/um/Makefile-x86 b/arch/um/Makefile-x86 new file mode 100644 index 000000000000..68fbd1b7c9f2 --- /dev/null +++ b/arch/um/Makefile-x86 @@ -0,0 +1,61 @@ +core-y += arch/um/sys-x86/ arch/x86/crypto/ + +ifeq ($(CONFIG_X86_32),y) +START := 0x8048000 + +LDFLAGS += -m elf_i386 +ELF_ARCH := i386 +ELF_FORMAT := elf32-i386 +CHECKFLAGS += -D__i386__ + +ifeq ("$(origin SUBARCH)", "command line") +ifneq ("$(shell uname -m | sed -e s/i.86/i386/)", "$(SUBARCH)") +KBUILD_CFLAGS += $(call cc-option,-m32) +KBUILD_AFLAGS += $(call cc-option,-m32) +LINK-y += $(call cc-option,-m32) + +export LDFLAGS +endif +endif + +# First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. +include $(srctree)/arch/x86/Makefile_32.cpu + +# prevent gcc from keeping the stack 16 byte aligned. Taken from i386. +cflags-y += $(call cc-option,-mpreferred-stack-boundary=2) + +# Prevent sprintf in nfsd from being converted to strcpy and resulting in +# an unresolved reference. +cflags-y += -ffreestanding + +# Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use +# a lot more stack due to the lack of sharing of stacklots. Also, gcc +# 4.3.0 needs -funit-at-a-time for extern inline functions. +KBUILD_CFLAGS += $(shell if [ $(call cc-version) -lt 0400 ] ; then \ + echo $(call cc-option,-fno-unit-at-a-time); \ + else echo $(call cc-option,-funit-at-a-time); fi ;) + +KBUILD_CFLAGS += $(cflags-y) + +else + +START := 0x60000000 + +KBUILD_CFLAGS += -fno-builtin -m64 + +CHECKFLAGS += -m64 -D__x86_64__ +KBUILD_AFLAGS += -m64 +LDFLAGS += -m elf_x86_64 +KBUILD_CPPFLAGS += -m64 + +ELF_ARCH := i386:x86-64 +ELF_FORMAT := elf64-x86-64 + +# Not on all 64-bit distros /lib is a symlink to /lib64. PLD is an example. + +LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib64 +LINK-y += -m64 + +# Do unit-at-a-time unconditionally on x86_64, following the host +KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) +endif |