GL: these helpers are never used on WebGL, compile them away.

src/Magnum/GL/AbstractFramebuffer.cpp

@@ -103,6 +103,7 @@ Int AbstractFramebuffer::maxDualSourceDrawBuffers() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_WEBGL
 void AbstractFramebuffer::createIfNotAlready() {
     if(_flags & ObjectFlag::Created) return;
 
@@ -113,6 +114,7 @@ void AbstractFramebuffer::createIfNotAlready() {
     bindInternal();
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 void AbstractFramebuffer::bind() {
     bindInternal(FramebufferTarget::Draw);

src/Magnum/GL/AbstractFramebuffer.h

@@ -778,7 +778,9 @@ class MAGNUM_GL_EXPORT AbstractFramebuffer {
             return *this;
         }
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         void MAGNUM_GL_LOCAL bindInternal(FramebufferTarget target);
         FramebufferTarget MAGNUM_GL_LOCAL bindInternal();

src/Magnum/GL/AbstractTexture.cpp

@@ -252,6 +252,7 @@ AbstractTexture::~AbstractTexture() {
     glDeleteTextures(1, &_id);
 }
 
+#ifndef MAGNUM_TARGET_WEBGL
 void AbstractTexture::createIfNotAlready() {
     if(_flags & ObjectFlag::Created) return;
 
@@ -262,6 +263,7 @@ void AbstractTexture::createIfNotAlready() {
     bindInternal();
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 #ifndef MAGNUM_TARGET_WEBGL
 Containers::String AbstractTexture::label() {

src/Magnum/GL/AbstractTexture.h

@@ -453,7 +453,9 @@ class MAGNUM_GL_EXPORT AbstractTexture: public AbstractObject {
         explicit AbstractTexture(NoCreateT, GLenum target) noexcept: _target{target}, _id{0}, _flags{ObjectFlag::DeleteOnDestruction} {}
         explicit AbstractTexture(GLuint id, GLenum target, ObjectFlags flags) noexcept: _target{target}, _id{id}, _flags{flags} {}
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         #if !defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL)
         void bindImageInternal(Int imageUnit, Int level, bool layered, Int layer, ImageAccess access, ImageFormat format);

src/Magnum/GL/Buffer.cpp

@@ -230,6 +230,7 @@ void Buffer::setTargetHintImplementationSwiftShader(Buffer& self, const TargetHi
 }
 #endif
 
+#ifndef MAGNUM_TARGET_WEBGL
 void Buffer::createIfNotAlready() {
     if(_flags & ObjectFlag::Created) return;
 
@@ -241,6 +242,7 @@ void Buffer::createIfNotAlready() {
     bindSomewhereInternal(_targetHint);
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 #ifndef MAGNUM_TARGET_WEBGL
 Containers::String Buffer::label() {

src/Magnum/GL/Buffer.h

@@ -1419,7 +1419,9 @@ class MAGNUM_GL_EXPORT Buffer: public AbstractObject {
         static void MAGNUM_GL_LOCAL setTargetHintImplementationSwiftShader(Buffer& self, TargetHint hint);
         #endif
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         #if !defined(MAGNUM_TARGET_GLES2) && !defined(MAGNUM_TARGET_WEBGL)
         static void MAGNUM_GL_LOCAL storageImplementationDefault(Buffer& self, Containers::ArrayView<const void> data, StorageFlags flags);

src/Magnum/GL/Mesh.cpp

@@ -391,6 +391,7 @@ Mesh& Mesh::operator=(Mesh&& other) noexcept {
 
 Mesh::Mesh(const GLuint id, const MeshPrimitive primitive, const ObjectFlags flags): _id{id}, _primitive{primitive}, _flags{flags} {}
 
+#ifndef MAGNUM_TARGET_WEBGL
 inline void Mesh::createIfNotAlready() {
     /* If VAO extension is not available, the following is always true */
     if(_flags & ObjectFlag::Created) return;
@@ -402,6 +403,7 @@ inline void Mesh::createIfNotAlready() {
     bindVAO();
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 #ifndef MAGNUM_TARGET_WEBGL
 Containers::String Mesh::label() {

src/Magnum/GL/Mesh.h

@@ -1208,7 +1208,9 @@ class MAGNUM_GL_EXPORT Mesh: public AbstractObject {
         /* Used by wrap() */
         explicit Mesh(GLuint id, MeshPrimitive primitive, ObjectFlags flags);
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         /* Computing stride of interleaved vertex attributes */
         template<UnsignedInt location, class T, class ...U> static GLsizei strideOfInterleaved(const Attribute<location, T>& attribute, const U&... attributes) {

src/Magnum/GL/Renderbuffer.cpp

@@ -99,6 +99,7 @@ Renderbuffer::~Renderbuffer() {
     glDeleteRenderbuffers(1, &_id);
 }
 
+#ifndef MAGNUM_TARGET_WEBGL
 inline void Renderbuffer::createIfNotAlready() {
     if(_flags & ObjectFlag::Created) return;
 
@@ -109,6 +110,7 @@ inline void Renderbuffer::createIfNotAlready() {
     bind();
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 #ifndef MAGNUM_TARGET_WEBGL
 Containers::String Renderbuffer::label() {

src/Magnum/GL/Renderbuffer.h

@@ -264,7 +264,9 @@ class MAGNUM_GL_EXPORT Renderbuffer: public AbstractObject {
         static void MAGNUM_GL_LOCAL createImplementationDSA(Renderbuffer& self);
         #endif
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         static void MAGNUM_GL_LOCAL storageImplementationDefault(Renderbuffer& self, RenderbufferFormat internalFormat, const Vector2i& size);
         #ifndef MAGNUM_TARGET_GLES

src/Magnum/GL/TransformFeedback.cpp

@@ -153,6 +153,7 @@ void TransformFeedback::bindInternal() {
     glBindTransformFeedback(GL_TRANSFORM_FEEDBACK, _id);
 }
 
+#ifndef MAGNUM_TARGET_WEBGL
 inline void TransformFeedback::createIfNotAlready() {
     if(_flags & ObjectFlag::Created) return;
 
@@ -163,6 +164,7 @@ inline void TransformFeedback::createIfNotAlready() {
     bindInternal();
     CORRADE_INTERNAL_ASSERT(_flags & ObjectFlag::Created);
 }
+#endif
 
 #ifndef MAGNUM_TARGET_WEBGL
 Containers::String TransformFeedback::label() {

src/Magnum/GL/TransformFeedback.h

@@ -436,7 +436,9 @@ class MAGNUM_GL_EXPORT TransformFeedback: public AbstractObject {
 
         void bindInternal();
 
+        #ifndef MAGNUM_TARGET_WEBGL
         void MAGNUM_GL_LOCAL createIfNotAlready();
+        #endif
 
         static void MAGNUM_GL_LOCAL createImplementationDefault(TransformFeedback& self);
         #ifndef MAGNUM_TARGET_GLES