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#1 (**permalink**) 04-19-2008, 06:28 AM

Magnus Hagander wrote:
> I just tried the MSVC build on a system with ActiveState Perl 5.10,
and
> it doesn't work. Some quick debugging before I downgraded to 5.8
showed
> that this regexp in Project.pm line 262:
> my $replace_re = qr{^([^:\n\$]+\.c)\s*:\s*(?:%\s*:
)?\$($[^$]+\))\/(.*)\/[^\/]+$};
>
> matches things properly using Perl 5.8 in for example
> src/bin/initdb/Makefile (matches a total of around 10 Makefiles), but
> in 5.10 it simply does not match anything...
>
> Any perl guru out there who can comment on why? ;-)

The answer is actually simple, the \n needs the multiline modifier,
and thus the m needs to be part of the quote-like operator.

The perl doc states:
"This operator quotes (and possibly compiles) its STRING"
(it seems 5.8 did not compile, but 5.10 does)

I feel that it is rather not a perl bug, and that the modifiers need to
be put
on the qr{}. I do not quite see why this re needs to be multiline in the
first place,
but I have not touched that in the attached patch, that is ready to
apply.
(modification works in perl 5.6, 5.8, 5.10)

Andreas

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#2 (**permalink**) 04-19-2008, 06:28 AM

Zeugswetter Andreas OSB SD wrote:
> Magnus Hagander wrote:
>
>> I just tried the MSVC build on a system with ActiveState Perl 5.10,
>>
> and
>
>> it doesn't work. Some quick debugging before I downgraded to 5.8
>>
> showed
>
>> that this regexp in Project.pm line 262:
>> my $replace_re = qr{^([^:\n\$]+\.c)\s*:\s*(?:%\s*:
>>
> )?\$($[^$]+\))\/(.*)\/[^\/]+$};
>
>> matches things properly using Perl 5.8 in for example
>> src/bin/initdb/Makefile (matches a total of around 10 Makefiles), but
>> in 5.10 it simply does not match anything...
>>
>> Any perl guru out there who can comment on why? ;-)
>>
>
> The answer is actually simple, the \n needs the multiline modifier,
> and thus the m needs to be part of the quote-like operator.
>
> The perl doc states:
> "This operator quotes (and possibly compiles) its STRING"
> (it seems 5.8 did not compile, but 5.10 does)
>
> I feel that it is rather not a perl bug, and that the modifiers need to
> be put
> on the qr{}. I do not quite see why this re needs to be multiline in the
> first place,
> but I have not touched that in the attached patch, that is ready to
> apply.
> (modification works in perl 5.6, 5.8, 5.10)
>
>

Thanks, that makes sense. I wonder how it ever worked before. Anyway,
patch applied back as far as 8.2.

cheers

andrew

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Re: [HACKERS] MSVC build broken with perl 5.10