Update project to require C++17 (#1266)

For #1241 Signed-off-by: osama <[email protected]>
p4lang · Sep 3, 2024 · 359aeea · 359aeea
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diff --git a/README.md b/README.md
@@ -3,7 +3,7 @@
 ![Build Status](https://github.com/p4lang/behavioral-model/workflows/Test/badge.svg?branch=main)
 
 This is the second version of the reference P4 software switch, nicknamed bmv2
-(for behavioral model version 2). The software switch is written in C++11. It
+(for behavioral model version 2). The software switch is written in C++17. It
 takes as input a JSON file generated from your P4 program by a [P4
 compiler](https://github.com/p4lang/p4c) and interprets it to implement the
 packet-processing behavior specified by that P4 program.

diff --git a/configure.ac b/configure.ac
@@ -126,8 +126,8 @@ LT_INIT
 
 AC_CONFIG_MACRO_DIR([m4])
 
-# enforce -std=c++11
-AX_CXX_COMPILE_STDCXX_11([noext],[mandatory])
+# enforce -std=c++17
+AX_CXX_COMPILE_STDCXX_17([noext],[mandatory])
 
 # Checks for header files.
 AC_LANG_PUSH(C)