# llcache

`ccache`-like program for `llc` and `opt`, mainly to speed up GHC on slow arches (aarch64).

## stack

Not exactly sure what `stack` does to `PATH` variable, but apparently trying to put `llcache`
compiled as `llc` and `opt` into `PATH` does *NOT* work.

Create symlinks (named `llc` and `opt`) somewhere, pointing at `llcache`.

	LLCACHE_DIR=~/.llcache stack ... --ghc-options '-pgmlo .../llcache/opt -pgmlc .../llcache/llc'

## TODO

* better error handling
* zstd compression of the output files
* handle stdin/stdout processing - llc/opt called without filename(s)
* rebuild when llc/opt changed (look at elf build id? sha256 the entire thing? check mtime?)