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[BOLT] Update build instructions in README 

Summary: Remove llvm.patch from build instructions.

(cherry picked from FBD29973395)
This commit is contained in:
Amir Ayupov 2021-07-28 14:45:10 -07:00 committed by Maksim Panchenko
parent a7e2a8f946
commit c33f08e7df
1 changed files with 3 additions and 8 deletions
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11
bolt/README.md
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@ -46,25 +46,20 @@ 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 LLVM and BOLT repos:
Start with cloning BOLT repo:
```
> git clone https://github.com/llvm-mirror/llvm llvm
> cd llvm/tools
> git checkout -b llvm-bolt f137ed238db11440f03083b1c88b7ffc0f4af65e
> git clone https://github.com/facebookincubator/BOLT llvm-bolt
> cd ..
> patch -p 1 < tools/llvm-bolt/llvm.patch
```
Proceed to a normal LLVM build using a compiler with C++11 support (for GCC
use version 4.9 or later):
```
> cd ..
> cd llvm-bolt
> mkdir build
> cd build
> cmake -G Ninja ../llvm -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON
> cmake -G Ninja ../llvm -DLLVM_ENABLE_PROJECTS="bolt" -DLLVM_TARGETS_TO_BUILD="X86;AArch64" -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=ON
> ninja
```