From Stephan Huber, attached you'll find a compile fix for the new introduced rowlength-feature on IOS/OpenGL ES builds

src/osg/Texture.cpp

@@ -1922,9 +1922,9 @@ void Texture::applyTexImage2D_load(State& state, GLenum target, const Image* ima
     {
         pbo = 0;
     }
-
+#if !defined(OSG_GLES1_FEATURES) && !defined(OSG_GLES2_FEATURES)
     glPixelStorei(GL_UNPACK_ROW_LENGTH,rowLength);
-
+#endif
     if( !mipmappingRequired || useHardwareMipMapGeneration)
     {
 
@@ -2177,9 +2177,9 @@ void Texture::applyTexImage2D_subload(State& state, GLenum target, const Image*
     {
         pbo = 0;
     }
-
+#if !defined(OSG_GLES1_FEATURES) && !defined(OSG_GLES2_FEATURES)
     glPixelStorei(GL_UNPACK_ROW_LENGTH,rowLength);
-
+#endif
     if( !mipmappingRequired || useHardwareMipMapGeneration)
     {