bug#54020: Allow user-defined libtool options

Mike Frysinger <[email protected]>, 2024-01-14 02:06:
> On 13 Jan 2024 22:29, Bogdan wrote:
>> Mike Frysinger <[email protected]>, 2024-01-13 07:19:
>>> On 15 Mar 2023 17:31, Bogdan wrote:
>>>>     Another patch from my side. This one makes it possible for users to
>>>> pass additional options to libtool in 'compile' mode. Fixes #54020.
>>>>
>>>>     Added documentation and a test case including the '-no-suppress'
>>>> option. All tests with 'lt' or 'libtool' in the name pass.
>>>>
>>>>     Feel free to rename the variables, I just came up with the names
>>>> LTCOMPILE_PREFLAGS and LTCOMPILE_POSTFLAGS, reflecting the positions
>>>> where the variables are put and the mode they're used in.
>>>
>>> why do we need LTCOMPILE_POSTFLAGS ?  isn't that just after the compile
>>> command ?  $obj_compile expands into e.g.
>>> 	\$(CC) @cpplike_flags \$(AM_CFLAGS) \$(CFLAGS)
>>>
>>> so if someone wants to add flags to C/etc..., they already have knobs
>>> to turn.
>>>
>>> which means this would simplify by only having one variable right ?
>>> AM_LTCOMPILE_FLAGS
>>
>>    Seems so, at least for now. At least for C compilers. At least until
>> $obj_compile becomes something else in the future or something more,
>> or even now contains (or will contain) other options after $(CFLAGS)
>> on the command line when using other compilers.
>>    For simplicity - yes, one flag like AM_LTCOMPILE_FLAGS should
>> suffice, at least now, as it seems. I've made pre- and post- flags for
>> better flexibility, to be future-proof.
>
> i don't see there ever being a future need here.  libtool's design is that
> it stops processing after the first non-argument after --mode=compile, and
> everything else is a wrapped command which libtool blindly executes.  those
> commands should have their own set of flags, and libtool is irrelevant at
> that point, so giving it a libtool-centric name that is used regardless of
> the wrapped command will never make sense.
> -mike


  And that's probably something I wasn't aware of. If it's
dead/useless code, feel free to remove this part. The fact that I made
a patch doesn't mean that it must be applied as a whole and never changed.

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