From 372b95f77f08ae7a64a5bca53cfb342ec5a8adc9 Mon Sep 17 00:00:00 2001
From: "Evgeny Grin (Karlson2k)" <k2k@narod.ru>
Date: Tue, 7 Mar 2023 21:37:12 +0300
Subject: [PATCH] doc: fix compiler warning in libcurl.m4

Current test for curl_free() may produce warnings with strict compiler
flags or even with default compiler flags with upcoming versions.
These warning could turned into errors by -Werror or similar flags.
Such warnings/errors are avoided by this patch.

Closes #10710
---
 docs/libcurl/libcurl.m4 | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/docs/libcurl/libcurl.m4 b/docs/libcurl/libcurl.m4
index 7215f44a3c..d02092073c 100644
--- a/docs/libcurl/libcurl.m4
+++ b/docs/libcurl/libcurl.m4
@@ -199,9 +199,10 @@ if (x) {;}
            _libcurl_save_libs=$LIBS
            LIBS="$LIBS $LIBCURL"
 
-           AC_CHECK_FUNC(curl_free,,
-              AC_DEFINE(curl_free,free,
-                [Define curl_free() as free() if our version of curl lacks curl_free.]))
+           AC_CHECK_DECL([curl_free],[],
+              [AC_DEFINE([curl_free],[free],
+                [Define curl_free() as free() if our version of curl lacks curl_free.])],
+              [[#include <curl/curl.h>]])
 
            CPPFLAGS=$_libcurl_save_cppflags
            LIBS=$_libcurl_save_libs
-- 
2.47.3