BOLT only works on x86_64 and arch64 on Linux.

DO NOT STRIP THE RESULTING .so FILES, llvm/llvm-project#56738. If you really need to, try adding -use-gnu-stack to BOLT_ARGS.

To build a BOLT-optimized version of Julia run the following commands (cd into this directory first)

make stage1
make copy_originals
make bolt_instrument
make finish_stage1
make merge_data
make bolt

After these commands finish, the optimized version of Julia will be built in the optimized.build directory.

This doesn't align the code to support huge pages as it doesn't seem that we do that currently, this decreases the size of the .so files by 2-4mb.