From 4cc4feffd8d7d8c809d2960e5fe81b6e85b70da0 Mon Sep 17 00:00:00 2001
From: Jean-Paul Pelteret <jppelteret@gmail.com>
Date: Tue, 16 Jun 2020 23:15:54 +0200
Subject: [PATCH] CMake: Increase minimum required version of GCC.

---
 cmake/setup_compiler_flags_gnu.cmake | 4 ++--
 doc/readme.html                      | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/cmake/setup_compiler_flags_gnu.cmake b/cmake/setup_compiler_flags_gnu.cmake
index a14a4b9717..f53eaeb9ff 100644
--- a/cmake/setup_compiler_flags_gnu.cmake
+++ b/cmake/setup_compiler_flags_gnu.cmake
@@ -21,10 +21,10 @@
 #
 
 IF( CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND
-    CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.9" )
+    CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0" )
   MESSAGE(FATAL_ERROR "\n"
     "deal.II requires support for features of C++14 that are not present in\n"
-    "versions of GCC prior to 4.9."
+    "versions of GCC prior to 5.0."
     )
 ENDIF()
 
diff --git a/doc/readme.html b/doc/readme.html
index eecdd24ea1..e8d370727d 100644
--- a/doc/readme.html
+++ b/doc/readme.html
@@ -62,8 +62,8 @@
         <acronym>deal.II</acronym> supports at least the following platforms:
     </p>
     <ul>
-        <li>GNU/Linux: GCC version 4.9 or later; Clang version 4.0 or later; ICC versions 15 or later</li>
-        <li>Mac OS X: GCC version 4.9 or later; Clang version 4.0 or later; <a href="https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_11.x_(since_Free_On-Device_Development)">Apple Clang version 9.0</a>  or later. 
+        <li>GNU/Linux: GCC version 5.0 or later; Clang version 4.0 or later; ICC versions 15 or later</li>
+        <li>Mac OS X: GCC version 5.0 or later; Clang version 4.0 or later; <a href="https://en.wikipedia.org/wiki/Xcode#Xcode_7.0_-_11.x_(since_Free_On-Device_Development)">Apple Clang version 9.0</a>  or later. 
             Please see the <a href="https://github.com/dealii/dealii/wiki/MacOSX" target="_top">deal.II Wiki</a> for installation instructions.</li>
         <li>Windows: experimental support for Visual Studio 2017. Please have a look at the
             <a href="https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#can-i-use-dealii-on-a-windows-platform">
-- 
2.39.5