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authorDavid Woodhouse <David.Woodhouse@intel.com>2014-01-08 11:21:20 +0000
committerH. Peter Anvin <hpa@linux.intel.com>2014-01-22 04:21:45 -0800
commit1c678da3bd1339299ab667af68cad5032367fb1c (patch)
treed4df9e4d44b85ab6a171bdcad5fb5b7c588228c5 /arch/x86/Makefile
parent214a88768d34079b70e0f2ba37b91a3b717fddbb (diff)
downloadop-kernel-dev-1c678da3bd1339299ab667af68cad5032367fb1c.zip
op-kernel-dev-1c678da3bd1339299ab667af68cad5032367fb1c.tar.gz
x86: Remove duplication of 16-bit CFLAGS
Define them once in arch/x86/Makefile instead of twice. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Link: http://lkml.kernel.org/r/1389180083-23249-1-git-send-email-David.Woodhouse@intel.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/Makefile')
-rw-r--r--arch/x86/Makefile14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 57d0215..83e67d5 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -11,6 +11,20 @@ else
KBUILD_DEFCONFIG := $(ARCH)_defconfig
endif
+# How to compile the 16-bit code. Note we always compile for -march=i386;
+# that way we can complain to the user if the CPU is insufficient.
+REALMODE_CFLAGS := -m32 -g -Os -D__KERNEL__ -DDISABLE_BRANCH_PROFILING \
+ -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \
+ -include $(srctree)/arch/x86/boot/code16gcc.h \
+ -fno-strict-aliasing -fomit-frame-pointer -fno-pic \
+ -mno-mmx -mno-sse \
+ $(call cc-option, -ffreestanding) \
+ $(call cc-option, -fno-toplevel-reorder,\
+ $(call cc-option, -fno-unit-at-a-time)) \
+ $(call cc-option, -fno-stack-protector) \
+ $(call cc-option, -mpreferred-stack-boundary=2)
+export REALMODE_CFLAGS
+
# BITS is used as extension for files which are available in a 32 bit
# and a 64 bit version to simplify shared Makefiles.
# e.g.: obj-y += foo_$(BITS).o
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