GCC 4.5 compatibility: fixed initializer-list issues.

src/Mesh.h

@@ -619,7 +619,7 @@ class MAGNUM_EXPORT Mesh {
 
         template<GLuint location, class T> inline void addVertexAttribute(typename std::enable_if<std::is_same<typename TypeTraits<T>::AttributeType, GLfloat>::value, Buffer*>::type buffer, const AbstractShaderProgram::Attribute<location, T>& attribute, GLintptr offset, GLsizei stride) {
             for(GLuint i = 0; i != Implementation::Attribute<T>::vectorCount(); ++i) {
-                attributes.push_back({
+                attributes.push_back(Attribute{
                     buffer,
                     location+i,
                     Implementation::Attribute<T>::size(attribute.dataOptions()),
@@ -635,7 +635,7 @@ class MAGNUM_EXPORT Mesh {
 
         #ifndef MAGNUM_TARGET_GLES2
         template<GLuint location, class T> inline void addVertexAttribute(typename std::enable_if<std::is_integral<typename TypeTraits<T>::AttributeType>::value, Buffer*>::type buffer, const AbstractShaderProgram::Attribute<location, T>& attribute, GLintptr offset, GLsizei stride) {
-            integerAttributes.push_back({
+            integerAttributes.push_back(IntegerAttribute{
                 buffer,
                 location,
                 Implementation::Attribute<T>::size(),
@@ -650,7 +650,7 @@ class MAGNUM_EXPORT Mesh {
         #ifndef MAGNUM_TARGET_GLES
         template<GLuint location, class T> inline void addVertexAttribute(typename std::enable_if<std::is_same<typename TypeTraits<T>::AttributeType, GLdouble>::value, Buffer*>::type buffer, const AbstractShaderProgram::Attribute<location, T>& attribute, GLintptr offset, GLsizei stride) {
             for(GLuint i = 0; i != Implementation::Attribute<T>::vectorCount(); ++i) {
-                longAttributes.push_back({
+                longAttributes.push_back(LongAttribute{
                     buffer,
                     location+i,
                     Implementation::Attribute<T>::size(),

src/Shaders/FlatShader.cpp

@@ -39,11 +39,22 @@ namespace {
 template<std::uint8_t dimensions> FlatShader<dimensions>::FlatShader() {
     Corrade::Utility::Resource rs("MagnumShaders");
 
+    /* Weird bug in GCC 4.5 - cannot use initializer list here, although the
+       same thing works in PhongShader flawlessly*/
+    #ifndef CORRADE_GCC45_COMPATIBILITY
     #ifndef MAGNUM_TARGET_GLES
     Version v = Context::current()->supportedVersion({Version::GL320, Version::GL210});
     #else
     Version v = Context::current()->supportedVersion({Version::GLES300, Version::GLES200});
     #endif
+    #else
+    #ifndef MAGNUM_TARGET_GLES
+    std::initializer_list<Version> vs{Version::GL320, Version::GL210};
+    #else
+    std::initializer_list<Version> vs{Version::GLES300, Version::GLES200};
+    #endif
+    Version v = Context::current()->supportedVersion(vs);
+    #endif
 
     Shader vertexShader(v, Shader::Type::Vertex);
     vertexShader.addSource(rs.get("compatibility.glsl"));