[tip:x86/urgent] x86, boot: Correct CFLAGS for hostprogs

[tip-bot for H. Peter Anvin]

Commit-ID:  446e1c86d51d0823e003a43a2b85c430efce2733
Gitweb:     http://git.kernel.org/tip/446e1c86d51d0823e003a43a2b85c430efce2733
Author:     H. Peter Anvin <hpa@xxxxxxxxx>
AuthorDate: Thu, 22 Mar 2012 11:08:18 -0700
Committer:  H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Thu, 22 Mar 2012 12:42:51 -0700

x86, boot: Correct CFLAGS for hostprogs

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@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Matt Fleming <matt.fleming@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1330436245-24875-5-git-send-email-matt@xxxxxxxxxxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
---
 arch/x86/boot/Makefile |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 3e02148..5a747dd 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -37,9 +37,9 @@ setup-y		+= video-bios.o
 targets		+= $(setup-y)
 hostprogs-y	:= mkcpustr tools/build
 
-HOSTCFLAGS_mkcpustr.o := -I$(srctree)/arch/$(SRCARCH)/include
-HOST_EXTRACFLAGS += -I$(objtree)/include -I$(srctree)/tools/include \
-                   -include $(srctree)/include/linux/kconfig.h
+HOST_EXTRACFLAGS += -I$(srctree)/tools/include $(LINUXINCLUDE) \
+	            -D__EXPORTED_HEADERS__
+
 $(obj)/cpu.o: $(obj)/cpustr.h
 
 quiet_cmd_cpustr = CPUSTR  $@
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