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Re: [Xen-devel] [PATCH v4 07/44] x86emul: also allow running the 32-bit harness on a 64-bit distro


  • To: Jan Beulich <JBeulich@xxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Tue, 13 Nov 2018 15:58:35 +0000
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  • Cc: George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>
  • Delivery-date: Tue, 13 Nov 2018 15:59:18 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
  • Openpgp: preference=signencrypt

On 13/11/2018 11:42, Jan Beulich wrote:
>>>> On 12.11.18 at 18:50, <andrew.cooper3@xxxxxxxxxx> wrote:
>> On 25/09/18 14:29, Jan Beulich wrote:
>>> In order to be able to verify the 32-bit variant builds and runs,
>>> introduce a respective target (and the necessary other adjustments).
>>>
>>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> I tried this, but got:
>>
>> make: Entering directory '/local/xen.git/tools/tests/x86_emulator/32'
>> gcc -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer 
>> -fno-strict-aliasing -Wdeclaration-after-statement -m32 
>> -I/local/xen.git/tools/tests/x86_emulator/32/../../../../tools/include -I.  
>> -D__XEN_TOOLS__ -c -g -o x86-emulate.o ../x86-emulate.c
>> gcc -Wall -Werror -Wstrict-prototypes -O2 -fomit-frame-pointer 
>> -fno-strict-aliasing -Wdeclaration-after-statement -m32 
>> -I/local/xen.git/tools/tests/x86_emulator/32/../../../../tools/include -I.  
>> -o test_x86_emulator x86-emulate.o ../test_x86_emulator.o ../evex-disp8.o 
>> ../wrappers.o
>> /usr/bin/ld: i386:x86-64 architecture of input file `../test_x86_emulator.o' 
>> is incompatible with i386 output
>> /usr/bin/ld: i386:x86-64 architecture of input file `../evex-disp8.o' is 
>> incompatible with i386 output
>> /usr/bin/ld: i386:x86-64 architecture of input file `../wrappers.o' is 
>> incompatible with i386 output
>> collect2: error: ld returned 1 exit status
>> ../Makefile:153: recipe for target 'test_x86_emulator' failed
> Hmm, nothing I can reproduce. I don't understand why it tries to use
> ../*.o instead of building 32-bit variants in the current directory.
> Perhaps a make version difference in how VPATH gets handled? But
> I know I've tried with different versions, which will make it rather
> hard for me to diagnose the issue. Could you see whether replacing
>
> VPATH += ..
>
> by
>
> vpath %.c ..
>
> helps in your case?

Sadly not.  That turns into:

make: Entering directory '/local/xen.git/tools/tests/x86_emulator/32'
make: *** No rule to make target 'x86-emulate.h', needed by
'x86-emulate.o'.  Stop.
make: Leaving directory '/local/xen.git/tools/tests/x86_emulator/32'

I've noticed another issue.  The clean target now rebuilds all the
binary fragements before deleting them again.

~Andrew

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