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Postings from May 2016
On Wed, May 18, 2016 at 08:46:48PM +0100, Nicholas Clark wrote:
> It's as much source compatibility.
Ah I see.
I've added the following text to mathoms.c which hopefully describes the
current situation:
commit d7244c9a613101b97077ed781e11a729c347555c
Author: David Mitchell <davem@iabyn.com>
AuthorDate: Mon May 23 15:45:20 2016 +0100
Commit: David Mitchell <davem@iabyn.com>
CommitDate: Mon May 23 15:45:20 2016 +0100
mathoms.c: add explanation why fns must be kept
See http://nntp.perl.org/group/perl.perl5.porters/236384.
Affected files ...
M mathoms.c
Differences ...
diff --git a/mathoms.c b/mathoms.c
index 6c60328..0ebf434 100644
--- a/mathoms.c
+++ b/mathoms.c
@@ -21,8 +21,16 @@
/*
* This file contains mathoms, various binary artifacts from previous
- * versions of Perl. For binary or source compatibility reasons, though,
- * we cannot completely remove them from the core code.
+ * versions of Perl which we cannot completely remove from the core
+ * code. There are two reasons functions should be here:
+ *
+ * 1) A function has been been replaced by a macro within a minor release,
+ * so XS modules compiled against an older release will expect to
+ * still be able to link against the function
+ * 2) A function Perl_foo(...) with #define foo Perl_foo(aTHX_ ...)
+ * has been replaced by a macro, e.g. #define foo(...) foo_flags(...,0)
+ * but XS code may still explicitly use the long form, i.e.
+ * Perl_foo(aTHX_ ...)
*
* REMEMBER to update makedef.pl when adding a function to mathoms.c whose
* name doesn't begin with "Perl_".
--
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