Re: [Xen-devel] Xen compilation fails for ARM32 when recompiled on a ARM64 build

[Julien Grall <julien.grall@xxxxxxx>]

Hi Andrew,

On 24/11/16 15:53, Andrew Cooper wrote:
> On 24/11/16 15:48, Bhupinder Thakur wrote:
> > Hi,
> >
> > I am facing an issue where the recompilation fails when you build for
> > ARM32 architecture on an existing build of ARM64.
> >
> > Even if I do make clean/make distclean before compiling for different
> > architecture it still fails.
> >
> > Steps to reproduce the issue:
> >
> > 1. git clone git://xenbits.xen.org/xen.git
> > <http://xenbits.xen.org/xen.git> xen.git
> > 2. make dist-xen XEN_TARGET_ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu
> > 3. make distclean
> > 4. make dist-xen XEN_TARGET_ARCH=arm32 CROSS_COMPILE=arm-linux-gnueabihf-
> >
> > Compilation fails at step 4.
> >
> > If I manually remove the following files and recompile then
> > compilation is successful:
> >
> > Remove xen/arch/arm/asm-offsets.s
> > Remove xen/arch/arm/xen.lds
> >
> > The same issue happens if you build for ARM32 first and then try to
> > build for ARM64. After removing the 2 files manually, the compilation
> > is successful.
> >
> > I am using the following toolchains:
> > gcc-linaro-4.9-2014.11-x86_64_aarch64-linux-gnu.tar.xz (for ARM64 build)
> > x86_64-gcc-4.9.0-nolibc_arm-unknown-linux-gnueabi.tar.xz (for ARM32
> > build -
> > https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/)
> >
> > I think probably the above-mentioned two files need to be removed
> > automatically when make distclean is run.
> They should be deleted on `make clean`.  They are temporary files just
> like .o's
It will only happen if you do make clean XEN_TARGET_ARCH=arm64/arm32.

This is because target clean/distclean is only called for a given 
architecture (by the default the host one).
I am not sure whether we should clean for any architecture.

Cheers,

--
Julien Grall

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