xen-unstable: build fails

[Juergen Gross <juergen.gross@ts.fujitsu.com>]

Hi,

I've just set up a machine with OpenSuse 11.4 and tried to build Xen.

Under root I did:

hg clone http://xenbits.xensource.com/xen-unstable.hg
cd xen-unstable.hg
make xen

The make failed with:

make[4]: Entering directory `/root/xen-unstable.hg/xen/arch/x86/boot'
RELOC=0x7c000 make -f build32.mk reloc.S
make[5]: Entering directory `/root/xen-unstable.hg/xen/arch/x86/boot'
make[5]: *** ../../../../.config: Is a directory.  Stop.
make[5]: Leaving directory `/root/xen-unstable.hg/xen/arch/x86/boot'
make[4]: *** [reloc.S] Error 2
make[4]: Leaving directory `/root/xen-unstable.hg/xen/arch/x86/boot'
make[3]: *** [/root/xen-unstable.hg/xen/arch/x86/boot/built_in.o] Error 2
make[3]: Leaving directory `/root/xen-unstable.hg/xen/arch/x86'
make[2]: *** [/root/xen-unstable.hg/xen/xen] Error 2
make[2]: Leaving directory `/root/xen-unstable.hg/xen'
make[1]: *** [install] Error 2
make[1]: Leaving directory `/root/xen-unstable.hg/xen'
make: *** [install-xen] Error 2

The reason seems to be a directory /root/.config which isn't present on my
other machines.

make tools

fails in a similar way. Many Makefiles seem to contain lines like:

XEN_ROOT=../..

which is a really bad idea in my opinion. XEN_ROOT should only be set, if it
is not yet defined.

I'd suggest to use

XEN_ROOT ?= $(PWD)/../..

instead. A patch is easily made, but affects ca. 100 Makefiles. And this
change could break the possibility to just do a "make" in a subdirectory.

Opinions?


Juergen

-- 
Juergen Gross                 Principal Developer Operating Systems
TSP ES&S SWE OS6                       Telephone: +49 (0) 89 3222 2967
Fujitsu Technology Solutions              e-mail: juergen.gross@ts.fujitsu.com
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