# Tested Environment

Ubuntu 16.04 64-bit on Thinkpad T440, 8/2/2016

# Installation Guide

1. Download and unzip the source file

• Use 7z may be easier, sudo apt install p7zip-full
• Run 7z x __FILENAME__ to unzip files
2. Download prerequisites

• ./contrib/download_prerequisites, a supercharged way to avoid future problems
• sudo apt-get install gcc-multilib flex, you will run into errors as stated below if you don’t have these installed
3. Make a folder for the compiled compiler to be placed

• mkdir __THE_DIR_FOR_COMPILER__, at wherever you want it to be
4. Configure and run makefile

• ./configure --prefix=\$HOME/Desktop/__THE_DIR_FOR_COMPILER__ --enable-languages=c,c++, I usually put my recent work at Desktop.
• A handy function for looking up the directory for --prefix is pwd
• make (This will take a while. To be precise, it took me 145 minutes 51.179 seconds on 8/3/2016)
• -j: compile on multiple cores
• make install

P.S I usually time the process when the compiler is being built :) Just add time in front of the commands aforementioned.

# Notes

• If the re-run is needed (when you need to rebuild after resolving errors), run the following command first:
make clean && make distclean

# Common errors

• Error message: g++: error: gengtype-lex.c: No such file or directory
• Solution: sudo apt-get install flex