From 232e8677b1f74e2d292db88beb8ac3273d5164ce Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Sun, 5 Jul 2020 19:50:24 +0200
Subject: [PATCH] Enforce using C++11 under macOS in configure

There is no reason not to turn it on there, as all compilers/compiler
versions supported under this platform support C++11 too.
---
 configure    | 4 ++++
 configure.in | 7 +++++++
 2 files changed, 11 insertions(+)

diff --git a/configure b/configure
index af6a54f13d..c4eadcb9cb 100755
--- a/configure
+++ b/configure
@@ -15152,6 +15152,10 @@ if test "$CXX" = "g++" -a "$GXX" != "yes"; then
     as_fn_error $? "C++ compiler is needed to build wxWidgets" "$LINENO" 5
 fi
 
+if test "$wxUSE_MAC" = 1 -a -z "$wxWITH_CXX"; then
+    wxWITH_CXX=11
+fi
+
 if test -n "$wxWITH_CXX"; then
             case "$wxWITH_CXX" in
         11)
diff --git a/configure.in b/configure.in
index a34c80a94b..47129cd400 100644
--- a/configure.in
+++ b/configure.in
@@ -1098,6 +1098,13 @@ if test "$CXX" = "g++" -a "$GXX" != "yes"; then
     AC_MSG_ERROR([C++ compiler is needed to build wxWidgets])
 fi
 
+dnl Always use C++11 under macOS, there are no supported compilers not
+dnl supporting it there, but don't prevent a latest version of C++ from being
+dnl used.
+if test "$wxUSE_MAC" = 1 -a -z "$wxWITH_CXX"; then
+    wxWITH_CXX=11
+fi
+
 if test -n "$wxWITH_CXX"; then
     dnl AX_CXX_COMPILE_STDCXX requires its VERSION argument to be specified at
     dnl autoconf, not run, time.