Misc questions:- licensing, VC++ IDE compatible, GPGPU, LTCG, QT, SDL

[Walter Bright]

bearophile wrote:
>> 3: I need my program to be as fast as possible. The Visual C++ compiler has
>> features such as "link-time code generation"
> 
> This page explains this topic:
> http://msdn.microsoft.com/en-us/magazine/cc301698.aspx

What's actually happening is interprocedural analysis, and inlining across 
source modules. In C++ this needs to happen at link time because the C++ 
compilation module is each source file is completely independent of other source 
files.

This is not true of D. In D, the compiler can (at the option of how it is 
compiled and how the programmer sets up the source modules) look at all the 
source to the program. Hence, a lot of inlining can (and does) happen across 
modules without needing any support from the linker.