v1-0001-Add-cast-from-pointer-to-void.patch

From fa45ec41de5201906ca1d6be663eb06f9ded5de4 Mon Sep 17 00:00:00 2001
From: John Naylor <john.naylor@postgresql.org>
Date: Tue, 1 Jul 2025 09:54:05 +0700
Subject: [PATCH v1] Add cast from pointer to void

Commit e2809e3a101 added code to a header which assigns a pointer
to void to a pointer to unsigned char. This causes build errors for
extensions written in C++. Fix by adding an explicit cast.

Discussion: https://postgr.es/m/
Backpatch-through: 18
---
 src/include/port/pg_crc32c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/include/port/pg_crc32c.h b/src/include/port/pg_crc32c.h
index 82313bb7fcf..ae008118ea8 100644
--- a/src/include/port/pg_crc32c.h
+++ b/src/include/port/pg_crc32c.h
@@ -72,7 +72,7 @@ pg_comp_crc32c_dispatch(pg_crc32c crc, const void *data, size_t len)
 {
 	if (__builtin_constant_p(len) && len < 32)
 	{
-		const unsigned char *p = data;
+		const unsigned char *p = (const unsigned char *) data;
 
 		/*
 		 * For small constant inputs, inline the computation to avoid a
-- 
2.50.0