building irssi and dependencies without root

gistfile1.sh

INST=/home/janus/or1k-inst
RUNPREFIX=/home/user
mkdir $INST
CC=/opt/cross/or1k-linux-musl/bin/or1k-linux-musl-gcc

wget -O - ftp://sourceware.org/pub/libffi/libffi-3.2.1.tar.gz | tar zx
cd libffi-3.2.1
./configure --prefix=$RUNPREFIX/libffi-build #--host=or1k-linux-musl CC=$CC
make -j2
make install DESTDIR=$INST
cd ..

wget -O - "http://ftp.gnome.org/pub/gnome/sources/glib/2.43/glib-2.43.2.tar.xz" | tar Jx
cd glib-2.43.2
PKG_CONFIG_PATH=$HOME/libffi-build/lib/pkgconfig ./configure --prefix=$HOME/glib-build
make -j2
make install
cd ..

wget -O - http://install.perlbrew.pl | bash
source ~/perl5/perlbrew/etc/bashrc
perlbrew install --notest perl-5.21.7
cd perl5/perlbrew/perls/perl-5.21.7/bin
ln -s perl5.21.7 perl
cd -
perlbrew use perl-5.21.7

wget -O - "http://irssi.org/files/irssi-0.8.17.tar.bz2" | tar jx
cd irssi-0.8.17
LD_LIBRARY_PATH=$HOME/glib-build/lib/ PKG_CONFIG_PATH=$HOME/glib-build/lib/pkgconfig ./configure --prefix=$HOME/irssi-build --enable-dane --enable-true-color --with-perl-staticlib
make -j2
make install
cd ..

mkdir .irssi
cd .irssi
ln -s ../irssi-build/share/irssi/scripts .
cd ..

wget -O - http://downloads.sourceforge.net/project/scons/scons/2.3.4/scons-2.3.4.tar.gz | tar zx
cd scons-2.3.4
python setup.py install --prefix=$HOME/scons-build
cd ..

#install GCRYPT using weechat guide (also gist)

wget -O - "https://otr.cypherpunks.ca/libotr-4.1.0.tar.gz" | tar zx
cd libotr-4.1.0
PATH=$HOME/libgcrypt-build/bin:$PATH ./configure --prefix=$HOME/libotr-build
make
make install
cd ..

wget https://github.com/cryptodotis/irssi-otr/archive/master.zip
unzip master.zip
rm master.zip
mv irssi-otr-master irssi-otr
cd irssi-otr/src

cat > SConstruct <<END
import os, os.path

irssi_prefix = os.path.join( os.getenv("HOME") , "irssi-build" )
libgcrypt_prefix = os.getenv("HOME")+"/libgcrypt-build"
libotr_prefix = os.getenv("HOME")+"/libotr-build"

libgcrypt_config = libgcrypt_prefix + "/bin/libgcrypt-config"

env = Environment(
	CFLAGS=["-ggdb3", "-fPIC", "-I" + irssi_prefix + "/include/irssi", "-I" + irssi_prefix + "/include/irssi/src", "-I" + irssi_prefix + "/include/irssi/src/core"],
	CPPDEFINES = {"VERSION": "\\\\\"1.0.1\\\\\""},
	STATIC_AND_SHARED_OBJECTS_ARE_THE_SAME=1,
	RPATH = [libgcrypt_prefix + "/lib", libotr_prefix + "/lib"]
)
env.ParseConfig("PKG_CONFIG_PATH=$HOME/glib-build/lib/pkgconfig pkg-config glib-2.0 --cflags --libs")
env.ParseConfig(libgcrypt_config + " --cflags --libs")
env.ParseConfig("PKG_CONFIG_PATH="+libotr_prefix+"/lib/pkgconfig pkg-config libotr --cflags --libs")

files = Glob("*.c")
objects = [env.Object(x) for x in files]
env.SharedLibrary("libotr.so", objects)
END
~/scons-build/bin/scons

mkdir -p ~/irssi-build/lib/irssi/modules
ln -s $PWD/libotr.so ~/irssi-build/lib/irssi/modules/
cd ../..

screen irssi-build/bin/irssi
/load otr

Unfortunately this script requires a number of newer libs and doesn't offer much of a workaround for when they're missing. Looks like without su access I'm out of luck.