# written on a cold November day 2016
# these instructions are for x86 computers, for x64 you know what to do :)
# install msys2 from http://msys2.github.io/
# after installation, open msys2 console and install some useful packages (msys2.exe)
# visit wiki pages of msys2 for further information
pacman -Syuu
pacman -S msys/make msys/perl msys/tar
pacman -S mingw32/mingw-w64-i686-binutils msys/binutils
pacman -S mingw32/mingw-w64-i686-gcc
pacman -S mingw32/mingw-w64-i686-make
pacman -S msys/pkg-config mingw32/mingw-w64-i686-pkg-config

# change console to mingw32 console (mingw32.exe)
# download required libraries for build process (openssl,zlib,libevent)
# Currently I cannot compile tor with openssl version greater than 1.0.2j
wget https://www.openssl.org/source/openssl-1.0.2j.tar.gz
wget http://zlib.net/zlib-1.2.8.tar.gz
wget https://github.com/libevent/libevent/releases/download/release-2.0.22-stable/libevent-2.0.22-stable.tar.gz
wget https://www.torproject.org/dist/tor-0.2.8.9.tar.gz
mkdir openssl && mkdir libevent && mkdir zlib && mkdir tor
tar xzf openssl-1.0.2j.tar.gz -C openssl
tar xzf zlib-1.2.8.tar.gz -C zlib
tar xzf libevent-2.0.22-stable.tar.gz -C libevent
tar xzf tor-0.2.8.9.tar.gz -C tor

# you may set these environment variables for compiling zlib
export INCLUDE_PATH="/mingw32/include:/mingw32/i686-w64-mingw32/include:$INCLUDE_PATH"
export LIBRARY_PATH="/mingw32/lib:/mingw32/i686-w64-mingw32/lib:$LIBRARY_PATH"
export BINARY_PATH="/mingw32/bin:/mingw32/i686-w64-mingw32/bin:$BINARY_PATH"

# compile zlib
cd ~/zlib/zlib-1.2.8
make -fwin32/Makefile.gcc

# compile libevent
cd ~/libevent/libevent-2.0.22-stable
./configure --prefix="$HOME/libevent/install" --enable-static --disable-shared
make
make install

# compile openssl (if you don't have a fast computer, this may take a long time)
# -static-libgcc flag may be redundant with -static but just in case.
cd ~/openssl/openssl-1.0.2j
LDFLAGS="-static -static-libgcc" ./Configure no-shared no-zlib no-asm --prefix="$HOME/openssl/install" -static mingw
make depend && make && make install

# now it is time to compile tor if everything is OK above
cd ~/tor/tor-0.2.8.9

export LDFLAGS="-static -static-libgcc -L$HOME/openssl/install/lib -L$HOME/libevent/install/lib -L$HOME/zlib/zlib-1.2.8 -L/mingw32/lib -L/mingw32/i686-w64-mingw32/lib"
export CFLAGS="-I$HOME/openssl/install/include -I$HOME/zlib/zlib-1.2.8 -I$HOME/libevent/install/include"
export LIBRARY_PATH="$HOME/openssl/install/lib:$HOME/libevent/install/lib:$HOME/zlib/zlib-1.2.8:/mingw32/lib:/mingw32/i686-w64-mingw32/lib"
export INCLUDE_PATH="$HOME/openssl/install/include:$HOME/zlib/zlib-1.2.8:$HOME/libevent/install/include:/mingw32/include:/mingw32/i686-w64-mingw32/include"
export BINARY_PATH="/mingw32/bin:/mingw32/i686-w64-mingw32/bin"
export PKG_CONFIG_PATH="$HOME/openssl/install/lib/pkgconfig:$PKG_CONFIG_PATH"

# this is important if -lcrypt32 is omitted, you may get linker error
export LIBS="-lcrypt32"

./configure --disable-gcc-hardening --enable-static-tor --prefix="$HOME/tor/install" --with-libevent-dir="$HOME/libevent/install/lib" --with-openssl-dir="$HOME/openssl/install/lib" --with-zlib-dir="$HOME/zlib/zlib-1.2.8"
make
make install

# The configuration parameter "--disable-gcc-hardening" builds Tor without requiring
# the libssp-0.dll. If you build without this parameter then don't forget to copy
# libssp-0.dll from /mingw32/bin to the folder where tor.exe is located. libssp is
# a library for stack protection.