From 0e2020989e3ace93937f782c594a06230124c848 Mon Sep 17 00:00:00 2001
From: Kyle Sunden <git@ksunden.space>
Date: Mon, 28 Nov 2022 19:40:04 -0600
Subject: [PATCH] Backport PR #24540: DOC: add note about enabling c++11
 support for old gcc

---
 doc/devel/dependencies.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/doc/devel/dependencies.rst b/doc/devel/dependencies.rst
index 1bef37f86690..7e9c468ee9b8 100644
--- a/doc/devel/dependencies.rst
+++ b/doc/devel/dependencies.rst
@@ -210,7 +210,8 @@ C++ compiler
 
 Matplotlib requires a C++ compiler that supports C++11.
 
-- `gcc 4.8.1 <https://gcc.gnu.org/projects/cxx-status.html#cxx11>`_ or higher
+- `gcc 4.8.1 <https://gcc.gnu.org/projects/cxx-status.html#cxx11>`_ or higher.  For gcc <6.5 you will
+  need to set ``$CFLAGS=-std=c++11`` to enable C++11 support.
 - `clang 3.3 <https://clang.llvm.org/cxx_status.html>`_ or higher
 - `Visual Studio 2015
   <https://docs.microsoft.com/en-us/cpp/overview/visual-cpp-language-conformance?view=msvc-140>`_