[RFC] add regenerate Makefile target

[Jens Remus]

Am 27.03.2024 um 19:14 schrieb Christophe Lyon:
> On Tue, 26 Mar 2024 at 16:42, Jens Remus <jremus@linux.ibm.com> wrote:
>> Am 15.03.2024 um 09:50 schrieb Christophe Lyon:
>>> On Thu, 14 Mar 2024 at 19:10, Simon Marchi <simark@simark.ca> wrote:
>>>> On 2024-03-13 04:02, Christophe Lyon via Gdb wrote:
>> ...
>>>> There's just the issue of files that are generated using tools that are
>>>> compiled.  When experimenting with maintainer mode the other day, I
>>>> stumbled on the opcodes/i386-gen, for instance.  I don't have a good
>>>> solution to that, except to rewrite these tools in a scripting language
>>>> like Python.
>>>
>>> So for opcodes, it currently means rewriting such programs for i386,
>>> aarch64, ia64 and luckily msp430/rl78/rx share the same opc2c
>>> generator.
>>> Not sure how to find volunteers?
>>
>> Why are those generated source files checked into the repository and not
>> generated at build-time? Would there be a reason for s390 do so as well
>> (opcodes/s390-opc.tab is generated at build-time from
>> opcodes/s390-opc.txt using s390-mkopc built from opcodes/s390-mkopc.c)?
>>
> I remember someone mentioned a requirement of being able to rebuild
> with the sources on a read-only filesystem.
> I don't know if there's a requirement that such generated files should
> be part of the source tree though. Is opcodes/s390-opc.tab in builddir
> or in srcdir?
> 
> I think there are other motivations but I can't remember them at the moment :-)

Thank you for the insights, Christophe! opcodes/s390-opc.tab is 
generated in builddir.

Regards,
Jens
-- 
Jens Remus
Linux on Z Development (D3303) and z/VSE Support
+49-7031-16-1128 Office
jremus@de.ibm.com

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