site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On Apr 19, 2005, at 2:41 AM, Matt Watson wrote: On Apr 18, 2005, at 11:16 PM, Ness Joumaa wrote: I have no idea what dynamic C++ classes are. Best wishes... _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... What is the difference between using dyld to add dynamic code to a library and using dynamic C++ classes instead? Is loading it through dynamic C++ classes platform dependent? And lastly, how do I create a dynamic library with Xcode? Most Darwin-like systems (including Darwin) have standardized on the dlopen(3) interfaces. As to how XCode creates dynamic libraries, you should probably ask on another list. Down here we use libtool or $(CC) -dynamiclib. matt. Hi Ness: You might keep in mind that everything in programming environments is about context in regards to the task at hand therefore what companies such as Apple choose as their programming environments may be different across different departments even within the same company as the tasks are different. Sometimes complexities do lead to more complexities... think of the Mandelbrot and Julia fractal sets for example, the wholes and parts may inter-relate but the scales sure are different and the borders upon close examination sure doesn't appear anything in likeness to the road which got us there. I don't want to belabor the point, but Matt's reply to you is contextual to what is going on in his department at Apple. His referral to you to a different list is probably good advice. However, before you leave (you may already be there and not review this note) I thought I could point out to you that there are a few pages discussing Dynamic Libraries which you may wish to refer to. The discussion appears within the Linux Programming Bible by John Goerzen between pp. 260-270. According to it, you may have been referring to the dynamic loader or dynamic linker which refers to tools inclusive in the C language. In C, the static and "dynamic" libraries are invoked by the programmer specifically. However, C++ is designed such that it invokes libraries it uses itself truly dynamically which is why it is considered a better C and a safer --- more complete --- environment to do C programming in. Reviewing the work of Bruce Eckel (his website has online books which are dowloadable) and other C++ luminaries could be useful in ferreting out the actual details you are searching an answer for. Unfortunately, many people consider such nuances a philosophical issue rather than a practical programming issue. I think real differences do exist however, I don't have the skill to explain them sufficiently. I have merely worked or investigated with both languages to have noticed that the differences of what "dynamic" means in C and C++ for myself. Much about programming is a personal experience as unique as determining what one wishes to eat at a particular time. I hope if nothing else, this note was a pointer to a fruitful direction. This email sent to site_archiver@lists.apple.com