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Conditional compilation

In computer programming, conditional compilation is a compilation technique which results in differing executable programs depending on parameters specified. This technique is commonly used when these differences in the program are needed to run it on different platforms, or with different versions of required libraries or hardware.

Examples
C# provides preprocessor directives for conditional compilation. • if DEBUG Console.WriteLine("Debug version"); • endif Rust supports conditional compilation. • [cfg_attr(target_os = "linux", path = "linux.rs")] • [cfg_attr(windows, path = "windows.rs")] mod os; ==Criticism==
Criticism
When conditional compilation depends on too many variables, it can make the code harder to reason about as the number of possible combinations of configuration increases exponentially.{{cite conference ==References==
Source: Wikipedia ↗
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