why must you compile C with embeded perl the same way?

[talan]

Hi. In the camel book, and in perlembed, it says: "COMPILE THE
PROGRAMS IN EXACTLY THE SAME WAY THAT YOUR PERL WAS COMPILED". Why is
that? Specifically, if you use ActivePerl in Windows, you didn't
compile perl at all. What sort of errors can come up if this isn't
heeded? When is it really important? Thanks.

 

[Joe Smith]

Hi. In the camel book, and in perlembed, it says: "COMPILE THE
PROGRAMS IN EXACTLY THE SAME WAY THAT YOUR PERL WAS COMPILED". Why is that?

Take a look at the output from 'perl -V'. There are some compiler flags
that, if they don't match, will prevent you code from properly linking
with the core code. For instance: -Duse64bitint -Dusethreads -Uusemymalloc.
And: useperlio=define d_sfio=undef uselargefiles=define usesocks=undef.

-Joe