From ad9b069230edc216ac1797946b1d881b0d8c1ee0 Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Thu, 30 Jul 2026 02:24:58 +0200
Subject: [PATCH] am disable if not supported, show warn

---
 configure.ac | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 5c83942fbc..a27e28d79d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4599,7 +4599,6 @@ AS_HELP_STRING([--disable-httpsig],[Disable HTTP Message Signatures support (exp
 [ case "$enableval" in
   no)
     AC_MSG_RESULT(no)
-    AC_DEFINE(CURL_DISABLE_HTTPSIG, 1, [to disable HTTP Message Signatures support])
     want_httpsig="no"
     ;;
   *)
@@ -4608,10 +4607,18 @@ AS_HELP_STRING([--disable-httpsig],[Disable HTTP Message Signatures support (exp
     ;;
   esac ],
     AC_MSG_RESULT(no)
-    AC_DEFINE(CURL_DISABLE_HTTPSIG, 1, [to disable HTTP Message Signatures support])
     want_httpsig="no"
 )
 
+if test "$want_httpsig" = "yes"; then
+  if test "$OPENSSL_ENABLED" = "1" || test "$WOLFSSL_ENABLED" = "1"; then
+    AC_MSG_WARN([HTTPSIG requires OpenSSL or wolfSSL. HTTPSIG support disabled.])
+  else
+    AC_DEFINE(CURL_DISABLE_HTTPSIG, 1, [to disable HTTP Message Signatures support])
+    want_httpsig="no"
+  fi
+fi
+
 dnl ************************************************************
 dnl disable NTLM support
 dnl