Steve Hay <[EMAIL PROTECTED]> writes: >>Yes that is it. You need to use PerlSIO_fxxxxx() for Standard IO under >>PERL_IMPLICIT_SYS. >> >> >Thanks for the reply. That fixed it straight away. Perhaps somebody >could do a DOC PATCH for Perl about this if it hasn't already been done. > My Perl 5.8.0 POD documents refer to lots of PerlIO_*() functions, but >grep()ing the entire POD sources for PerlSIO_*() I see no mention of >them at all.
The whole PERL_IMPLICIT_SYS thing is really an ActiveState invention and PerlSIO_* should really be documented along with PerlLIO_*() PerlProc_*() and various others. I think I understand how they work, but in general for PERL_IMPLICIT_SYS HowTo questions it is probably best to ask ActiveState. > >Two more questions about this: > >1) Am I right in thinking that these PerlSIO_*() functions do the "right >thing" where PERL_IMPLICIT_SYS is not defined? (It appears to from >repeating the build with "my" (non-ActivePerl) Perl.) Yes they do. > >2) What's the best way to go about getting my XS to build under both >Perl 5.8.0 and Perl 5.6.x as well? The PerlSIO_*() functions don't >appear to be in those older versions. Is it simply by way of #if/#else >statements making use of the #define's in patchlevel.h that specify the >Perl revision/version/subversion? Perl5.8 introduced _real_ PerlIO *. The things that are now PerlSIO_xxxx() used to be PerlIO_xxxx() for PERL_IMPLICIT_SYS - but that got in the way of using stdio under PerlIO. > >Also, under Perl 5.6.1/PERL_IMPLICIT_SYS the compiler is happy about >fclose(), but seems to have a problem with the PerlIO_importFILE() function: > >warning C4047: 'function' : 'int ' differs in levels of indirection from >'const char *' >warning C4024: 'PerlIO_importFILE' : different types for formal and >actual parameter 2 >warning C4133: 'function' : incompatible types - from 'struct _PerlIO *' >to 'struct _iobuf *' > >The first two warnings here seem to stem from the odd prototype that is >given in the "extern" declaration in iperlsys.h under PERL_IMPLICIT_SYS: > >extern PerlIO * PerlIO_importFILE (FILE *,int); > >(I was expecting (FILE *, const char *) here, which is what it now is >under Perl 5.8.0 [in perlio.h] -- was that just a bug in Perl 5.6.x?) > >The last warning looks similar to problem that I had with fclose() under >Perl 5.8.0/PERL_IMPLICIT_SYS. The linker also bombs out with: > >error LNK2001: unresolved external symbol _PerlIO_importFILE > >Where is this "extern" PerlIO_importFILE() supposed to come from? Under perl5.6 a PerlIO * _is_ a FILE * so PerlIO_importFILE can be a no-op macro (I think this is still true under PERL_IMPLICIT_SYS). -- Nick Ing-Simmons http://www.ni-s.u-net.com/
