Update the minimum supported GCC version.

diff --git a/cmake/setup_compiler_flags_gnu.cmake b/cmake/setup_compiler_flags_gnu.cmake
index a00de57d936d33377beb42c9a2abc21de1053e04..59504616ccbc3bff4018a8bd1e865679a8b40098 100644 (file)
--- 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 "3.4" )
+    CMAKE_CXX_COMPILER_VERSION VERSION_LESS "4.8" )
   MESSAGE(WARNING "\n"
-    "You're using an old version of the GNU Compiler Collection (gcc/g++)!\n"
-    "It is strongly recommended to use at least version 3.4.\n"
+    "deal.II requires support for features of C++11 that are not present in\n"
+    "versions of GCC prior to 4.8."
     )
 ENDIF()