Add support for building LLVM
Add a llvm.py subcommand for building LLVM in a given build directory.
The build directory must have already been configured with CMake. The
build command that is run will be either a 'ninja' command or a 'make'
command, depending on whether the build directory contains a
'build.ninja' or a 'Makefile'. If it contains neither of those, an error
is generated.
I initially wanted to put the implementation for this in the
LLVMBuildConfig, but it doesn't really need anything from there. For now
I left it as a free-standing function. It doesn't have any knowledge of
LLVM whatsoever, so an argument could be made for moving it into the
"utils" package rather than the "llvm" package. In the future, we may
want to remove the LLVMBuildConfig class and see if there's a better way
to organize the code for configuring and building.
One disadvantage with using python here is that we lose the nice
progress bars that we could see when running 'ninja check' from the bash
scripts. I'm not sure how to fix that, suggestions welcome.
Change-Id: I48cf464a6412238a26eb5bcfb4723946983c86f2
5 files changed