mirror of
https://github.com/travitch/whole-program-llvm
synced 2026-06-08 17:53:44 +00:00
Ian A. Mason
87 lines
1.4 KiB
Markdown
87 lines
1.4 KiB
Markdown
# Compiling Apache on Ubuntu
|
|
|
|
|
|
On a clean 14.04 machine I will build apache.
|
|
|
|
```
|
|
>pwd
|
|
|
|
/vagrant
|
|
|
|
>more /etc/lsb-release
|
|
|
|
DISTRIB_ID=Ubuntu
|
|
DISTRIB_RELEASE=14.04
|
|
DISTRIB_CODENAME=trusty
|
|
DISTRIB_DESCRIPTION="Ubuntu 14.04.2 LTS"
|
|
```
|
|
|
|
|
|
## Step 1.
|
|
|
|
|
|
Install `wllvm`.
|
|
|
|
```
|
|
>sudo apt-get update
|
|
|
|
>sudo apt-get install python-pip
|
|
|
|
>sudo pip install wllvm
|
|
|
|
```
|
|
|
|
## Step 2.
|
|
|
|
I am only going to build apache, not apr, so I first install the prerequisites.
|
|
|
|
```
|
|
>sudo apt-get install llvm-3.4 clang-3.4 libapr1-dev libaprutil1-dev
|
|
|
|
``` Note `wllvm` is agnostic with respect to llvm versions, when you
|
|
use clang, so feel free to install a more recent version if you
|
|
wish. However, if you are going to use dragonegg the llvm version is
|
|
tightly coupled to the gcc and plugin versions you are using.
|
|
|
|
|
|
## Step 3.
|
|
|
|
Configure the wllvm tool to use clang and be relatively quiet:
|
|
|
|
```
|
|
>export LLVM_COMPILER=clang
|
|
|
|
>export WLLVM_OUTPUT=WARNING
|
|
```
|
|
|
|
|
|
## Step 4.
|
|
|
|
Fetch apache, untar, configure, then build:
|
|
|
|
```
|
|
>wget https://archive.apache.org/dist/httpd/httpd-2.4.18.tar.gz
|
|
|
|
>tar xfz httpd-2.4.18.tar.gz
|
|
|
|
>cd httpd-2.4.18
|
|
|
|
>CC=wllvm ./configure
|
|
|
|
>make
|
|
```
|
|
|
|
## Step 5.
|
|
|
|
Extract the bitcode.
|
|
|
|
```
|
|
>extract-bc -l llvm-link-3.4 httpd
|
|
|
|
>ls -la httpd.bc
|
|
-rw-rw-r-- 1 vagrant vagrant 860608 Aug 4 16:55 httpd.bc
|
|
```
|
|
|
|
The extra command line argument to `extract-bc` is because `apt`
|
|
installs `llvm-link` as `llvm-link-3.4` so we need to tell `extract-bc`
|
|
to use that one. |