Where (and what) is "DynaLoader object"

syphilis has asked for the wisdom of the Perl Monks concerning the following question:

Hi,

My perl-5.12.0 installation has DynaLoader-1.10.
My perl-5.14.0 installation has DynaLoader-1.13

If I replace my 5.14.0 DynaLoader.pm with the 5.12.0 DynaLoader.pm, then (using perl-5.14.0) any attempt to load DynaLoader.pm results in the error:

DynaLoader object version 1.13 does not match $DynaLoader::VERSION 1.1
+0 at C:/perl514_M/lib/DynaLoader.pm line 91.
Compilation failed in require at -e line 1.
[download]

Fair enough - that's the error you'd expect if a "DynaLoader object" exists, and its version is checked against $DynaLoader::VERSION.
The thing that's now got me puzzled is what's the name of this DynaLoader object, and where is it located ?

Is it built into the perl514.dll ?
If so, then I guess that makes it a bit more difficult to downgrade DynaLoader - one would have to rebuild perl.

(I'm faced with a strange load error with PDL::Graphics::PLplot and pthreads - one that doesn't occur with perl-5.12 and earlier. I was curious to see whether the later version of DynaLoader might have a hand in it ... but if that can't easily be tested, it's probably not worth doing.)

Cheers,
Rob

Comment on Where (and what) is "DynaLoader object" Download Code

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Re: Where (and what) is "DynaLoader object" (yes, perl*.dll) by tye (Sage) on Sep 19, 2011 at 01:51 UTC
DynaLoader's XS code is responsible for loading up code found in shared libraries. So you can't have a DynaLoader.dll or DynaLoader.so like other modules. Yes, DynaLoader's XS code gets linked into the perl*.dll (or even perl.exe) file. - tye	[reply]
Re: Where (and what) is "DynaLoader object" by Anonymous Monk on Sep 19, 2011 at 06:35 UTC
Yup, what tye said `$ perl -MPadWalker -MDynaLoader -le " print for grep /_/, keys %::" _<perl.c _<perllib.c _<C:/perl/site/5.14.1/lib/MSWin32-x86-multi-thread/auto/PadWalker/PadW +alker.dll _<PadWalker.c ↨ARNING_BITS _<DynaLoader.c _<-e _<Win32CORE.c _<..\perlio.c ↕E_TRIE_MAXBUF _<..\universal.c _<..\mro.c _ _<win32.c _<C:/perl/5.14.1/lib/warnings.pm` [download]	[reply] [d/l]