Platform: GLFW doesn't allow to create GL 3.1 core contexts.

src/Magnum/Platform/GlfwApplication.cpp

@@ -206,9 +206,9 @@ bool GlfwApplication::tryCreate(const Configuration& configuration, const GLConf
         glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, major);
         glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, minor);
         #ifndef MAGNUM_TARGET_GLES
-        if(glConfiguration.version() >= GL::Version::GL310) {
-            glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, true);
+        if(glConfiguration.version() >= GL::Version::GL320) {
             glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+            glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, true);
         }
         #else
         glfwWindowHint(GLFW_CLIENT_API, GLFW_OPENGL_ES_API);

src/Magnum/Platform/GlfwApplication.h

@@ -544,7 +544,7 @@ class GlfwApplication::GLConfiguration {
         /**
          * @brief Set context version
          *
-         * If requesting version greater or equal to OpenGL 3.1, core profile
+         * If requesting version greater or equal to OpenGL 3.2, core profile
          * is used. The created context will then have any version which is
          * backwards-compatible with requested one. Default is
          * @ref GL::Version::None, i.e. any provided version is used.