From 34f75118f07e78ce589d27be544ac77377e96eff Mon Sep 17 00:00:00 2001
From: Tristan Penman <tristan@tristanpenman.com>
Date: Thu, 10 Feb 2022 10:45:07 +1100
Subject: [PATCH] Add note about GCC versions to readme

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2f473ae..64ff36b 100644
--- a/README.md
+++ b/README.md
@@ -247,7 +247,7 @@ Doxygen documentation can be built by running 'doxygen' from the project root di
 
 ## Dependencies ##
 
-Valijson requires a compiler with C++11 support.
+Valijson requires a compiler with full C++11 support. Please note that versions of GCC prior to 4.9.0 had incomplete `<regex>` support, so `pattern` constraints may not work. If using GCC, it is recommended that you use GCC 5.0 or later.
 
 When building the test suite, Boost 1.54, Qt 5 and Poco are optional dependencies.