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x86, boot: Correct CFLAGS for hostprogs

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This is a partial revert of commit:
    d40f833 "Restrict CFLAGS for hostprogs"

The endian-manipulation macros in tools/include need <linux/types.h>,
but the hostprogs in arch/x86/boot need several headers from the
kernel build tree, which means we have to add the kernel headers to
the include path.  This picks up <linux/types.h> from the kernel tree,
which gives a warning.

Since this use of <linux/types.h> is intentional, add
-D__EXPORTED_HEADERS__ to the command line to silence the warning.

A better way to fix this would be to always install the exported
kernel headers into $(objtree)/usr/include as a standard part of the
kernel build, but that is a lot more involved.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Matt Fleming <matt.fleming@intel.com>
Link: http://lkml.kernel.org/r/1330436245-24875-5-git-send-email-matt@console-pimps.org
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin
2012-03-22 11:08:18 -07:00
parent 13354dc412
commit 446e1c86d5
1 changed files with 3 additions and 3 deletions
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6
arch/x86/boot/Makefile
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@@ -37,9 +37,9 @@ setup-y += video-bios.o
targets += $(setup-y) targets += $(setup-y)
hostprogs-y := mkcpustr tools/build hostprogs-y := mkcpustr tools/build
HOSTCFLAGS_mkcpustr.o := -I$(srctree)/arch/$(SRCARCH)/include HOST_EXTRACFLAGS += -I$(srctree)/tools/include $(LINUXINCLUDE) \
HOST_EXTRACFLAGS += -I$(objtree)/include -I$(srctree)/tools/include \ -D__EXPORTED_HEADERS__
-include $(srctree)/include/linux/kconfig.h
$(obj)/cpu.o: $(obj)/cpustr.h $(obj)/cpu.o: $(obj)/cpustr.h
quiet_cmd_cpustr = CPUSTR $@ quiet_cmd_cpustr = CPUSTR $@