Re: [Xen-devel] Compilation error crossbuilding tools.

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2013-04-08 at 11:28 +0100, Stefano Stabellini wrote:
> On Sat, 6 Apr 2013, Sander Bogaert wrote:
> > On compilation ( followed the wiki ) I get:
> > ....
> > arm-linux-gnueabihf-gcc  -O1 -fno-omit-frame-pointer -marm -g
> > -fno-strict-aliasing -std=gnu99 -Wall -Wstrict-prototypes
> > -Wdeclaration-after-statement -Wno-unused-but-set-variable
> > -Wno-unused-local-typedefs   -D__XEN_TOOLS__ -MMD -MF .block-qcow2.o.d
> >  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -fno-optimize-sibling-calls
> >  -Werror -Wno-unused -I../lib
> > -I/home/user/source/xen/xen-main/tools/blktap/drivers/../../../tools/libxc
> > -I/home/user/source/xen/xen-main/tools/blktap/drivers/../../../tools/include
> > -I/home/user/source/xen/xen-main/tools/blktap/drivers/../../../tools/xenstore
> > -I/home/user/source/xen/xen-main/tools/blktap/drivers/../../../tools/include
> > -D_GNU_SOURCE -DMEMSHR -I ../../memshr -pthread  -c -o block-qcow2.o
> > block-qcow2.c
> > block-qcow2.c: In function 'bdrv_pread':
> > block-qcow2.c:238:4: error: format '%llx' expects argument of type
> > 'long long unsigned int', but argument 5 has type '__off_t'
> > [-Werror=format]
> > cc1: all warnings being treated as errors
> > make[5]: *** [block-qcow2.o] Error 1
> > make[5]: Leaving directory 
> > `/home/user/source/xen/xen-main/tools/blktap/drivers'
> > make[4]: *** [subdir-install-drivers] Error 2
> > make[4]: Leaving directory `/home/user/source/xen/xen-main/tools/blktap'
> > make[3]: *** [subdirs-install] Error 2
> > make[3]: Leaving directory `/home/user/source/xen/xen-main/tools/blktap'
> > make[2]: *** [subdir-install-blktap] Error 2
> > make[2]: Leaving directory `/home/user/source/xen/xen-main/tools'
> > make[1]: *** [subdirs-install] Error 2
> > make[1]: Leaving directory `/home/user/source/xen/xen-main/tools'
> > make: *** [install-tools] Error 2
> 
> Reading the error, I think that the appended patch (completely untested)
> should fix the problem:

blktap(1) shouldn't even be attempted to build on ARM. My series 
"arm: tools: build for arm64 and enable cross-compiling for both arm32
and arm64" contains "tools: only build blktap1 on x86".

That series is a prerequisite for cross building and is not yet applied.

Ian.



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