On 10/17/2016 10:26 AM, Thomas Huth wrote:
> On 14.10.2016 20:58, Michael Tokarev wrote:
>> Hi.
>> This commit: c9bc3437a905b660561a26cd4ecc64579843267b
>> Author: Richard Henderson <r...@twiddle.net>
>> Date:   Tue Jun 21 17:32:12 2016 -0700
>>     linux-user: Provide safe_syscall for s390x
>> does not build on debian unstable porterbox for s390x, with
>> the following error message:
>> linux-user/host/s390x/safe-syscall.inc.S: Assembler messages:
>> linux-user/host/s390x/safe-syscall.inc.S:75: Error: Unrecognized opcode:
>> `lt'
>> rules.mak:72: recipe for target 'linux-user/safe-syscall.o' failed
>> Since I know nothing about s390, I've no idea what's at fault
>> here... :)  Thought I'd report this :)
> "lt" seems to be a newer s390x opcode which has been added to the
> architecture within the last ten years or so. So maybe you've got to add
> some "-march=xxx" flag when compiling this file?
> Could you maybe start with finding out the exact comand line that is
> used to compile this file?

Yes, lt was added with the extended immidiate facility. So either use 
-march=z9-109 (introduced in
2005) or replace the lt with an l + ltr to also run on older models.

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