mirror of
https://github.com/danog/gllvm.git
synced 2024-11-26 20:44:44 +01:00
159 lines
4.8 KiB
Markdown
159 lines
4.8 KiB
Markdown
# Compiling Apache on Ubuntu
|
|
|
|
|
|
On a clean 16.04 server machine I will build apache. Desktop instructions should be no different.
|
|
|
|
```
|
|
>more /etc/lsb-release
|
|
|
|
DISTRIB_ID=Ubuntu
|
|
DISTRIB_RELEASE=16.04
|
|
DISTRIB_CODENAME=xenial
|
|
DISTRIB_DESCRIPTION="Ubuntu 16.04.4 LTS"
|
|
```
|
|
|
|
## Step 0.
|
|
|
|
Install the `go` language.
|
|
```
|
|
>sudo apt-get install golang
|
|
```
|
|
|
|
## Step 1.
|
|
|
|
Install `gllvm`.
|
|
|
|
```
|
|
>export GOPATH=/vagrant/go
|
|
|
|
>go get github.com/SRI-CSL/gllvm/cmd/...
|
|
|
|
>export PATH=${GOPATH}/bin:${PATH}
|
|
```
|
|
|
|
## Step 2.
|
|
|
|
I am only going to build apache, not apr, so I first install the prerequisites.
|
|
|
|
```
|
|
>sudo apt-get install llvm libclang-dev clang libapr1-dev libaprutil1-dev libpcre3-dev make
|
|
|
|
```
|
|
|
|
At this point, you could check your clang version with `which clang` and `ls -l /usr/bin/clang`.
|
|
It should be at least clang-3.8.
|
|
|
|
## Step 3.
|
|
|
|
Configure the gllvm tool to be relatively quiet:
|
|
|
|
```
|
|
>export WLLVM_OUTPUT_LEVEL=WARNING
|
|
>export WLLVM_OUTPUT_FILE=/vagrant/apache-build.log
|
|
```
|
|
|
|
## Step 4.
|
|
|
|
Fetch apache, untar, configure, then build:
|
|
|
|
```
|
|
|
|
>wget https://archive.apache.org/dist/httpd/httpd-2.4.33.tar.gz
|
|
|
|
>tar xfz httpd-2.4.33.tar.gz
|
|
|
|
>cd httpd-2.4.33
|
|
|
|
>CC=gllvm ./configure
|
|
|
|
>make
|
|
```
|
|
|
|
## Step 5.
|
|
|
|
Extract the bitcode.
|
|
|
|
```
|
|
>get-bc -m httpd
|
|
|
|
>ls -la httpd.bc
|
|
-rw-rw-r-- 1 vagrant vagrant 1172844 May 8 22:39 httpd.bc
|
|
```
|
|
|
|
The `-m` flag instructs the `get-bc` tool to write a manifest too, the manifest lists all the bitcode modules
|
|
that were linked together to create the `httpd.bc` module.
|
|
|
|
```
|
|
more httpd.bc.llvm.manifest
|
|
|
|
/home/vagrant/httpd-2.4.33/.modules.o.bc
|
|
/home/vagrant/httpd-2.4.33/.buildmark.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.main.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.vhost.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.mpm_common.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_filter.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_pcre.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.exports.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.scoreboard.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.error_bucket.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.protocol.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.core.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.request.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.provider.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.eoc_bucket.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.eor_bucket.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.core_filters.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_expr_eval.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.config.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.log.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_fcgi.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_script.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_md5.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_cfgtree.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_time.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.connection.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.listen.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_mutex.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.mpm_unix.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.mpm_fdqueue.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_cookies.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_debug.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_xml.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_regex.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_expr_parse.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/.util_expr_scan.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/core/.mod_so.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.http_core.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.http_protocol.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.http_request.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.http_filters.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.chunk_filter.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.byterange_filter.o.bc
|
|
/home/vagrant/httpd-2.4.33/modules/http/.http_etag.o.bc
|
|
/home/vagrant/httpd-2.4.33/server/mpm/event/.event.o.bc
|
|
/home/vagrant/httpd-2.4.33/os/unix/.unixd.o.bc
|
|
```
|
|
|
|
## Step 6.
|
|
|
|
Turn the bitcode into a second executable binary. (optional -- just for fun and sanity checking)
|
|
|
|
```
|
|
llc -filetype=obj httpd.bc
|
|
clang httpd.o -Wl,--export-dynamic -lpthread -lapr-1 -laprutil-1 -lpcre -o httpd_from_bc
|
|
```
|
|
See [here](http://tldp.org/HOWTO/Program-Library-HOWTO/shared-libraries.html) for an explanation of the
|
|
```
|
|
-Wl,--export-dynamic
|
|
```
|
|
incantation. The salient point being
|
|
```
|
|
"In some cases, the call to gcc to create the object file will also need to include the option
|
|
'-Wl,-export-dynamic'. Normally, the dynamic symbol table contains only symbols which
|
|
are used by a dynamic object. This option (when creating an ELF file) adds all symbols to the
|
|
dynamic symbol table (see ld(1) for more information). You need to use this option when there are
|
|
'reverse dependencies', i.e., a DL library has unresolved symbols that by convention must be
|
|
defined in the programs that intend to load these libraries."
|
|
```
|