Generating a Clang cross-compiler

Clang dynamically supports the generation of code for any target, as seen in the previous sections. However, there are reasons to generate a target-dedicated Clang cross-compiler:

• If the user wishes to avoid using long command lines to invoke the driver

• If a manufacturer wishes to ship a platform-specific Clang-based toolchain to its clients

Configuration options

The LLVM configure system has the following options that assist in cross-compiler generation:

• --target: This option specifies the default target triple that the Clang cross-compiler generates code for. This relates to the target, host, and build concepts we defined earlier. The --host and --build options are also available, but these are guessed by the configure script—both refer to the native platform.

• --enable-targets: This option specifies which targets this installation will support. If omitted, all targets will be supported. Remember that you must use the command-line options previously explained...