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More info about using local LLVM (#547) 

* more info about llvm-config

* typo

Co-Authored-By: Santiago Pastorino <spastorino@gmail.com>

Co-authored-by: Santiago Pastorino <spastorino@gmail.com>
This commit is contained in:
Who? Me?! 2019-12-31 06:46:49 -06:00 committed by Santiago Pastorino
parent e7315b42c4
commit 412384a1aa
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src/building/suggested.md
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@ -74,5 +74,15 @@ This is specified in the `target` section of `config.toml`:
llvm-config = "/path/to/llvm/llvm-7.0.1/bin/llvm-config"
```
On my system, this path is `/usr/bin/llvm-config-7`, but this probably varies
by installation.
We have observed the following paths before, which may be different from your system:
- `/usr/bin/llvm-config-8`
- `/usr/lib/llvm-8/bin/llvm-config`
Note that you need to have the LLVM `FileCheck` tool installed, which is used
for codegen tests. This tool is normally built with LLVM, but if you use your
own preinstalled LLVM, you will need to provide `FileCheck` in some other way.
On Debian-based systems, you can install the `llvm-N-tools` package (where `N`
is the LLVM version number, e.g. `llvm-8-tools`). Alternately, you can specify
the path to `FileCheck` with the `llvm-filecheck` config item in `config.toml`
or you can disable codegen test with the `codegen-tests` item in `config.toml`.