armhf c++ 的预处理器变量

Question

Such a question: how can I determine that the code is running on a computer that has an armhf processor?
I know that for ARM64 there is a preprocessor variable __aarch64__ and I can do something like this:

 #if defined(__aarch64___)... #endif

Is there the same variable for armhf?

Answer 1

A command similar to this one lists all the predefined macros of your compiler (of course, you have to replace g++ by your actual compiler for the specific target, and add the specific options for this target).

echo | g++ -dM -E - | sort

You will certainly detect some explicit enough names you can test with #if defined . And of course, once you have found the interesting names, you have to check the documentation in order to ensure they actually have the meaning you suppose.