Re: [Xen-devel] [PATCH] pv drivers: wrap xen_cpuid_base()

[Olaf Hering <olaf@xxxxxxxxx>]

On Mon, Jan 23, Jan Beulich wrote:

> sle11sp2 (3.0): building fine.)

Not for the xen.src.rpm, it also contains this change. I think the
reason is that the kernel sources are searched before the xen sources
for asm/hypervisor.h:

/usr/src/linux-3.0.13-0.11/arch/x86/include/asm/hypervisor.h
/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/include/asm/hypervisor.h


This is the cmdline as shown by 
make -C /usr/src/linux-obj/x86_64/default modules 
M=/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default V=1
abuild@bax:/usr/src/linux-obj/x86_64/default> gcc
-Wp,-MD,/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci/.platform-pci.o.d
-nostdinc
-isystem
/usr/lib64/gcc/x86_64-suse-linux/4.3/include
-I/usr/src/linux-3.0.13-0.11/arch/x86/include
-Iarch/x86/include/generated
-Iinclude
-I/usr/src/linux-3.0.13-0.11/include
-include
include/generated/autoconf.h
-I/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci
-D__KERNEL__ -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs 
-fno-strict-aliasing -fno-common -Werror-implicit-function-declaration 
-Wno-format-security -fno-delete-null-pointer-checks -O2 -m64 -mtune=generic 
-mno-red-zone -mcmodel=kernel -funit-at-a-time -maccumulate-outgoing-args 
-DCONFIG_AS_CFI=1 -DCONFIG_AS_CFI_SIGNAL_FRAME=1 -DCONFIG_AS_CFI_SECTIONS=1 
-DCONFIG_AS_FXSAVEQ=1 -pipe -Wno-sign-compare -mno-sse -mno-mmx -mno-sse2 
-mno-3dnow -fno-stack-protector -fomit-frame-pointer 
-fasynchronous-unwind-tables -g -fno-inline-functions-called-once 
-Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow 
-D__XEN_INTERFACE_VERSION__=0x00030205 -DCONFIG_XEN_COMPAT=0xffffff
-I/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/include
-I/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/compat-include
-DHAVE_XEN_PLATFORM_COMPAT_H
-include 
/usr/src/linux-3.0.13-0.11-obj/x86_64/default/include/generated/autoconf.h
-I/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci  
-DMODULE  -D"KBUILD_STR(s)=#s" -D"KBUILD_BASENAME=KBUILD_STR(platform_pci)"  
-D"KBUILD_MODNAME=KBUILD_STR(xen_platform_pci)" -c -o 
/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci/.tmp_platform-pci.o
 
/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci/platform-pci.c
 --save-temps
gcc: warning: -pipe ignored because -save-temps specified
/usr/src/packages/BUILD/xen-4.2.24547/non-dbg/obj/default/platform-pci/platform-pci.c:121:
 error: redefinition of 'xen_cpuid_base'
/usr/src/linux-3.0.13-0.11/arch/x86/include/asm/xen/hypervisor.h:43: error: 
previous definition of 'xen_cpuid_base' was here


Its probably not a bug to prefer kernel-source over local directories.

Olaf

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