1 files changed, 42 insertions, 0 deletions

diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386
new file mode 100644
index 00000000000..302cbe50454
--- /dev/null
+++ b/arch/um/Makefile-i386
@@ -0,0 +1,42 @@
+core-y += arch/um/sys-i386/ arch/x86/crypto/
+
+TOP_ADDR := $(CONFIG_TOP_ADDR)
+
+START := 0x8048000
+
+LDFLAGS                 += -m elf_i386
+ELF_ARCH                := $(SUBARCH)
+ELF_FORMAT              := elf32-$(SUBARCH)
+OBJCOPYFLAGS            := -O binary -R .note -R .comment -S
+HEADER_ARCH             := x86
+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)
+UML_OBJCOPYFLAGS        += -F $(ELF_FORMAT)
+
+export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS
+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)