glDrawElementsBaseVertex() needs ARB_draw_elements_base_vertex.

src/Magnum/Mesh.h

@@ -524,6 +524,8 @@ class MAGNUM_EXPORT Mesh: public AbstractObject {
          *
          * Sets number of vertices of which the vertex buffer will be offset
          * when drawing. Default is `0`.
+         * @requires_gl32 %Extension @extension{ARB,draw_elements_base_vertex}
+         *      for indexed meshes
          * @requires_gl Base vertex cannot be specified for indexed meshes in
          *      OpenGL ES.
          */

src/Magnum/MeshView.h

@@ -88,6 +88,8 @@ class MAGNUM_EXPORT MeshView {
          *
          * Sets number of vertices of which the vertex buffer will be offset
          * when drawing. Default is `0`.
+         * @requires_gl32 %Extension @extension{ARB,draw_elements_base_vertex}
+         *      for indexed meshes
          * @requires_gl Base vertex cannot be specified for indexed meshes in
          *      OpenGL ES.
          */

src/Magnum/Test/MeshGLTest.cpp

@@ -1276,6 +1276,9 @@ void MeshGLTest::setIndexBufferUnsignedInt() {
 
 #ifndef MAGNUM_TARGET_GLES
 void MeshGLTest::setBaseVertex() {
+    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::draw_elements_base_vertex>())
+        CORRADE_SKIP(Extensions::GL::ARB::draw_elements_base_vertex::string() + std::string(" is not available."));
+
     Buffer vertices;
     vertices.setData(indexedVertexDataBaseVertex, BufferUsage::StaticDraw);