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coptimizationclangcompiler-optimizationarmclang

Is it possible to prevent optimization from a single translation unit, or part of it?

In a project that includes dozens of modules, we have O1 as the default debug optimization level.

Sometimes, I need a lesser optimization (i.e., no optimization at all). So I use the clang attribute optnone to exclude a single function from optimization.

But when the number of functions to exclude is large, this becomes cumbersome.

Is there a way to exclude a whole module from optimization? For example set a pragma at the top of the module.

Solution

  • Clang has a compiler-specific pragma yes, try:

    #pragma clang optimize off
//region of code
#pragma clang optimize on