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Rebase: [PR] Fix build instructions

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Summary:
As titled.

(cherry picked from FBD32740596)
This commit is contained in:
Rafael Auler 2021-09-25 21:20:47 +03:00 committed by Maksim Panchenko
parent 4157682fd9
commit 62550dd22c
1 changed files with 6 additions and 13 deletions
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19
bolt/README.md
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@ -37,7 +37,7 @@ encounter any issues.
### Docker Image
You can build and use the docker image containing BOLT using our [docker file](./utils/docker/Dockerfile).
You can build and use the docker image containing BOLT using our [docker file](./bolt/utils/docker/Dockerfile).
Alternatively, you can build BOLT manually using the steps below.
### Manual Build
@ -46,28 +46,21 @@ BOLT heavily uses LLVM libraries, and by design, it is built as one of LLVM
tools. The build process is not much different from a regular LLVM build.
The following instructions are assuming that you are running under Linux.
Start with cloning BOLT repo:
Start with cloning LLVM and BOLT repos:
```
> git clone https://github.com/facebookincubator/BOLT llvm-bolt
```
Proceed to a normal LLVM build using a compiler with C++11 support (for GCC
use version 4.9 or later):
```
> cd llvm-bolt
> mkdir build
> cd build
> cmake -G Ninja ../llvm -DLLVM_ENABLE_PROJECTS="bolt" -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON
> cmake -G Ninja ../llvm-bolt/llvm -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_PROJECTS="clang;lld;bolt"
> ninja
```
`llvm-bolt` will be available under `bin/`. Add this directory to your path to
ensure the rest of the commands in this tutorial work.
Note that we use a specific revision of LLVM as we currently rely on a set of
patches that are not yet upstreamed.
Note that we use a specific snapshot of LLVM monorepo as we currently
rely on a set of patches that are not yet upstreamed.
## Optimizing BOLT's Performance
@ -87,7 +80,7 @@ Or if you rather use tcmalloc:
## Usage
For a complete practical guide of using BOLT see [Optimizing Clang with BOLT](./docs/OptimizingClang.md).
For a complete practical guide of using BOLT see [Optimizing Clang with BOLT](./bolt/docs/OptimizingClang.md).
### Step 0