From c4242b1e6e29f4362d9a87e8fb4f129402179897 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 9 Aug 2021 10:44:56 +0200
Subject: [PATCH] configure: error out if both ngtcp2 and quiche are specified

Reported-by: Vincent Grande
See #7539
Closes #7545
---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index 3d8c0d1d35..bbce393fc9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2893,6 +2893,11 @@ case "$OPT_QUICHE" in
 esac
 
 if test X"$want_quiche" != Xno; then
+
+  if test "$NGHTTP3_ENABLED" = 1; then
+    AC_MSG_ERROR([--with-quiche and --with-ngtcp2 are mutually exclusive])
+  fi
+
   dnl backup the pre-quiche variables
   CLEANLDFLAGS="$LDFLAGS"
   CLEANCPPFLAGS="$CPPFLAGS"