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author | David Mitchell <davem@iabyn.com> | 2010-02-08 21:07:56 +0000 |
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committer | David Mitchell <davem@iabyn.com> | 2010-02-08 21:07:56 +0000 |
commit | 0972ecdf6decc0f53d00772c18026d31b7aaf416 (patch) | |
tree | d41c5fe8a5e3a5cfa67b0b0399955ef381f99ead /pod/perlguts.pod | |
parent | 23fb3b56e6bbdf76d116b861805f197ea6d83428 (diff) | |
download | perl-0972ecdf6decc0f53d00772c18026d31b7aaf416.tar.gz |
Warn people not to set PERL_CORE in XS
Diffstat (limited to 'pod/perlguts.pod')
-rw-r--r-- | pod/perlguts.pod | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/pod/perlguts.pod b/pod/perlguts.pod index 5a68341a6d..97445e1ba3 100644 --- a/pod/perlguts.pod +++ b/pod/perlguts.pod @@ -2181,9 +2181,13 @@ functions or functions used in a program in which Perl is embedded. Similarly, all global variables begin with C<PL_>. (By convention, static functions start with C<S_>.) -Inside the Perl core, you can get at the functions either with or -without the C<Perl_> prefix, thanks to a bunch of defines that live in -F<embed.h>. This header file is generated automatically from +Inside the Perl core (C<PERL_CORE> defined), you can get at the functions +either with or without the C<Perl_> prefix, thanks to a bunch of defines +that live in F<embed.h>. Note that extension code should I<not> set +C<PERL_CORE>; this exposes the full perl internals, and is likely to cause +breakage of the XS in each new perl release. + +The file F<embed.h> is generated automatically from F<embed.pl> and F<embed.fnc>. F<embed.pl> also creates the prototyping header files for the internal functions, generates the documentation and a lot of other bits and pieces. It's important that when you add |