Why do we need to compile for different platforms (e.g. Windows/Linux)?

Question

I\'ve learned the basics about CPUs/ASM/C and don\'t understand why we need to compile C code differently for different OS targets. What the compiler does is create Assemble

Answer 1

You might want to check the other answers.

Its kind of duplicate question except that its for C not C++

You can check process of compilation steps here:

C compilation steps

In short , even though C is can be cross platform to run, due to compilers its not cross-platform compile-able.