Don't declare C89 realloc()

The declaration is actually for PerlMem_realloc(), which is a macro for
either realloc() or an indirection through the interpreter struct, depending
on configuration — see iperlsys.h. If it's the indrection, this declaration
will be a syntax error, so it must be in fact plain old realloc().

The declaration is guarded with HAS_REALLOC_PROTOTYPE, which isn't actually
defined or consulted anywhere else in the codebase.

Since we require C89, there's no need for this — we #include <stdlib.h>, and
therefore can assume realloc() exists.

1 files changed, 0 insertions, 3 deletions

diff --git a/util.c b/util.c
index e7fe661e0f..087c918faa 100644
--- a/util.c
+++ b/util.c
@@ -214,9 +214,6 @@ Perl_safesysrealloc(Malloc_t where,MEM_SIZE size)
 	? ((struct perl_memory_debug_header *)((char *)where - PERL_MEMORY_DEBUG_HEADER_SIZE))->size
 	: 0;
 #endif
-#if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO)
-    Malloc_t PerlMem_realloc();
-#endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */
 
     if (!size) {
 	safesysfree(where);