From 999982b06ce1d1280e5ce48f9253c6c536f41a12 Mon Sep 17 00:00:00 2001
From: MarcoFalke <falke.marco@gmail.com>
Date: Fri, 11 Feb 2022 13:08:55 +0100
Subject: build: Add --enable-c++20 option

---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 63ff6a1ebd..f59418205c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,8 +78,18 @@ AC_ARG_WITH([seccomp],
   [seccomp_found=$withval],
   [seccomp_found=auto])
 
+AC_ARG_ENABLE([c++20],
+  [AS_HELP_STRING([--enable-c++20],
+  [enable compilation in c++20 mode (disabled by default)])],
+  [use_cxx20=$enableval],
+  [use_cxx20=no])
+
 dnl Require C++17 compiler (no GNU extensions)
+if test "$use_cxx20" = "no"; then
 AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
+else
+AX_CXX_COMPILE_STDCXX([20], [noext], [mandatory])
+fi
 
 dnl Check if -latomic is required for <std::atomic>
 CHECK_ATOMIC
-- 
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