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146 lines
4.0 KiB
Markdown
146 lines
4.0 KiB
Markdown
# Compiling Apache on Ubuntu
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On a clean 16.04 server machine I will build apache. Desktop instructions should be no different.
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```
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>more /etc/lsb-release
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DISTRIB_ID=Ubuntu
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DISTRIB_RELEASE=16.04
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DISTRIB_CODENAME=xenial
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DISTRIB_DESCRIPTION="Ubuntu 16.04.4 LTS"
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```
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## Step 0.
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Install the `go` language.
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```
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>sudo apt-get install golang
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```
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## Step 1.
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Install `gllvm`.
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```
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>export GOPATH=/vagrant/go
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>go get github.com/SRI-CSL/gllvm/cmd/...
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>export PATH=${GOPATH}/bin:${PATH}
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```
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## Step 2.
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I am only going to build apache, not apr, so I first install the prerequisites.
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```
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>sudo apt-get install llvm libclang-dev clang libapr1-dev libaprutil1-dev libpcre3-dev make
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```
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At this point, you could check your clang version with `which clang` and `ls -l /usr/bin/clang`.
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It should be at least clang-3.8.
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## Step 3.
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Configure the gllvm tool to be relatively quiet:
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```
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>export WLLVM_OUTPUT_LEVEL=WARNING
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>export WLLVM_OUTPUT_FILE=/vagrant/apache-build.log
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```
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## Step 4.
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Fetch apache, untar, configure, then build:
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```
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>wget https://archive.apache.org/dist/httpd/httpd-2.4.33.tar.gz
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>tar xfz httpd-2.4.33.tar.gz
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>cd httpd-2.4.33
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>CC=gllvm ./configure
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>make
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```
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## Step 5.
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Extract the bitcode.
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```
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>get-bc -m httpd
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>ls -la httpd.bc
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-rw-rw-r-- 1 vagrant vagrant 1172844 May 8 22:39 httpd.bc
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```
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The `-m` flag instructs the `get-bc` tool to write a manifest too, the manifest lists all the bitcode modules
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that were linked together to create the `httpd.bc` module.
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```
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more httpd.bc.llvm.manifest
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/home/vagrant/httpd-2.4.33/.modules.o.bc
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/home/vagrant/httpd-2.4.33/.buildmark.o.bc
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/home/vagrant/httpd-2.4.33/server/.main.o.bc
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/home/vagrant/httpd-2.4.33/server/.vhost.o.bc
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/home/vagrant/httpd-2.4.33/server/.util.o.bc
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/home/vagrant/httpd-2.4.33/server/.mpm_common.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_filter.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_pcre.o.bc
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/home/vagrant/httpd-2.4.33/server/.exports.o.bc
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/home/vagrant/httpd-2.4.33/server/.scoreboard.o.bc
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/home/vagrant/httpd-2.4.33/server/.error_bucket.o.bc
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/home/vagrant/httpd-2.4.33/server/.protocol.o.bc
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/home/vagrant/httpd-2.4.33/server/.core.o.bc
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/home/vagrant/httpd-2.4.33/server/.request.o.bc
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/home/vagrant/httpd-2.4.33/server/.provider.o.bc
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/home/vagrant/httpd-2.4.33/server/.eoc_bucket.o.bc
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/home/vagrant/httpd-2.4.33/server/.eor_bucket.o.bc
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/home/vagrant/httpd-2.4.33/server/.core_filters.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_expr_eval.o.bc
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/home/vagrant/httpd-2.4.33/server/.config.o.bc
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/home/vagrant/httpd-2.4.33/server/.log.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_fcgi.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_script.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_md5.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_cfgtree.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_time.o.bc
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/home/vagrant/httpd-2.4.33/server/.connection.o.bc
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/home/vagrant/httpd-2.4.33/server/.listen.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_mutex.o.bc
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/home/vagrant/httpd-2.4.33/server/.mpm_unix.o.bc
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/home/vagrant/httpd-2.4.33/server/.mpm_fdqueue.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_cookies.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_debug.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_xml.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_regex.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_expr_parse.o.bc
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/home/vagrant/httpd-2.4.33/server/.util_expr_scan.o.bc
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/home/vagrant/httpd-2.4.33/modules/core/.mod_so.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.http_core.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.http_protocol.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.http_request.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.http_filters.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.chunk_filter.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.byterange_filter.o.bc
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/home/vagrant/httpd-2.4.33/modules/http/.http_etag.o.bc
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/home/vagrant/httpd-2.4.33/server/mpm/event/.event.o.bc
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/home/vagrant/httpd-2.4.33/os/unix/.unixd.o.bc
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```
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## Step 6.
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Turn the bitcode into a second executable binary. (optional -- just for fun and sanity checking)
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```
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llc -filetype=obj httpd.bc
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gcc httpd.o -lpthread -lapr-1 -laprutil-1 -lpcre -o httpd.new
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```
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