Targeting a different CPU architecture
Today, many small computers such as the Raspberry Pi are in use and have only limited resources. Running a compiler on such a computer is often not possible or takes too much runtime. Hence, a common requirement for a compiler is to generate code for a different CPU architecture. The whole process of creating an executable is called cross-compiling. In the previous section, you created a small example application based on the LLVM libraries. Now we will take this application and compile it for a different target.
With cross-compiling, there are two systems involved: the compiler runs on the host system and produces code for the target system. To denote the systems, the so-called triple is used. This is a configuration string that usually consists of the CPU architecture, the vendor, and the operating system. More information about the environment is often added. For example, the triple x86_64-pc-win32 is used for a Windows system running on...
