fix C++ builds broken by cdc4a174060

In commit cdc4a174060 static noreturn function, on a C++ build, (specific
example, GCC ) got a post preprocessor prototype of
"extern "C" static void S_fn_doesnt_return(". GCC generates a compile error
if "extern "C"" and static used together. Plain C build were not affected.

This commit fixed the problem by creating 2 new static exclusive macros, so
extern "C" does not wind up on statics in a C++ build. The macros allow
enough flexibility so any compiler/platform that needs a noreturn
declaration specifier instead of a noreturn function attribute can have
one.

1 files changed, 14 insertions, 0 deletions

diff --git a/perl.h b/perl.h
index bf96a8ea04..dfa0a4a426 100644
--- a/perl.h
+++ b/perl.h
@@ -5017,6 +5017,20 @@ struct tempsym; /* defined in pp_pack.c */
 #    define PERL_CALLCONV_NO_RET PERL_CALLCONV
 #endif
 
+/* PERL_STATIC_NO_RET is supposed to be equivalent to STATIC on builds that
+   dont have a noreturn as a declaration specifier
+*/
+#ifndef PERL_STATIC_NO_RET
+#  define PERL_STATIC_NO_RET STATIC
+#endif
+/* PERL_STATIC_NO_RET is supposed to be equivalent to PERL_STATIC_INLINE on
+   builds that dont have a noreturn as a declaration specifier
+*/
+#ifndef PERL_STATIC_INLINE_NO_RET
+#  define PERL_STATIC_INLINE_NO_RET PERL_STATIC_INLINE
+#endif
+
+
 #undef PERL_CKDEF
 #undef PERL_PPDEF
 #define PERL_CKDEF(s)	PERL_CALLCONV OP *s (pTHX_ OP *o);