From 1994393f7ac4ddaa4dca01eccd8a208d2d9b0237 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Wed, 26 Mar 2025 09:21:04 -0400
Subject: [PATCH] cmCurl: Provide CURL_WRITEFUNC_ERROR for curl < 7.87

---
 Source/cmCurl.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Source/cmCurl.h b/Source/cmCurl.h
index 933a173a39..b588c5f942 100644
--- a/Source/cmCurl.h
+++ b/Source/cmCurl.h
@@ -11,6 +11,11 @@
 
 #include <cm3p/curl/curl.h>
 
+// curl versions before 7.87.0 did not provide CURL_WRITEFUNC_ERROR
+#if defined(LIBCURL_VERSION_NUM) && LIBCURL_VERSION_NUM < 0x075700
+#  define CURL_WRITEFUNC_ERROR 0xFFFFFFFF
+#endif
+
 void cmCurlInitOnce();
 cm::optional<int> cmCurlParseTLSVersion(cm::string_view tls_version);
 cm::optional<std::string> cmCurlPrintTLSVersion(int curl_tls_version);