From 02be314e9c9f3cf27787c82358646b72a53c52d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Mon, 17 Feb 2014 22:00:55 +0100
Subject: [PATCH] Error out when compatibility branch is needed for particular
 compiler.

---
 CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 477226da7..0b669eb74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -90,6 +90,13 @@ if(BUILD_TESTS)
     enable_testing()
 endif()
 
+# Check compiler compatibility
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" AND "${CMAKE_CXX_COMPILER_VERSION}" VERSION_LESS "4.6.0")
+    message(FATAL_ERROR "Compatibility branch of Magnum is needed for use with GCC < 4.6. See the documentation for more information.")
+elseif(MSVC)
+    message(FATAL_ERROR "Compatibility branch of Magnum is needed for use with MSVC. See the documentation for more information.")
+endif()
+
 # If targeting NaCl or Emscripten, set explicit OpenGL ES 2.0 support
 if(CORRADE_TARGET_NACL OR CORRADE_TARGET_EMSCRIPTEN)
     set(TARGET_GLES 1)