Cross compilation notes ======================= Static 64 bit windows binary on Ubuntu 15.10 (Wily Werewolf) --------------------------------------------------------------------- Install cross compiler and friends ```sh sudo apt-get install g++-mingw-w64-x86-64 ``` Default is to use Win32 threading model which lacks std::mutex and such. So we change defaults ```sh sudo update-alternatives --set x86_64-w64-mingw32-g++ /usr/bin/x86_64-w64-mingw32-g++-posix ``` From now on we assume we have everything in `~/dev/`. Get Boost sources unpacked into `~/dev/boost_1_60_0/` and change directory to it. Now add out cross compiler configuration. Warning: the following will wipe out whatever you had in there. ```sh echo "using gcc : mingw : x86_64-w64-mingw32-g++ ;" > ~/user-config.jam ``` Proceed with building Boost normal way, but let's define dedicated staging directory ```sh ./bootstrap.sh ./b2 toolset=gcc-mingw target-os=windows variant=release link=static runtime-link=static address-model=64 \ --build-type=minimal --with-filesystem --with-program_options --with-date_time \ --stagedir=stage-mingw-64 cd .. ``` Now we get & build OpenSSL ```sh git clone https://github.com/openssl/openssl cd openssl git checkout OpenSSL_1_0_2g ./Configure mingw64 no-rc2 no-rc4 no-rc5 no-idea no-bf no-cast no-whirlpool no-md2 no-md4 no-ripemd no-mdc2 \ no-camellia no-seed no-comp no-krb5 no-gmp no-rfc3779 no-ec2m no-ssl2 no-jpake no-srp no-sctp no-srtp \ --prefix=~/dev/stage --cross-compile-prefix=x86_64-w64-mingw32- make depend make make install cd .. ``` and Zlib ```sh git clone https://github.com/madler/zlib cd zlib git checkout v1.2.8 CC=x86_64-w64-mingw32-gcc CFLAGS=-O3 ./configure --static --64 --prefix=~/dev/stage make make install cd .. ``` Now we prepare cross toolchain hint file for CMake, let's name it `~/dev/toolchain-mingw.cmake` ```cmake SET(CMAKE_SYSTEM_NAME Windows) SET(CMAKE_C_COMPILER x86_64-w64-mingw32-gcc) SET(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++) SET(CMAKE_RC_COMPILER x86_64-w64-mingw32-windres) SET(CMAKE_FIND_ROOT_PATH /usr/x86_64-w64-mingw32) set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER) ``` Download miniupnpc, unpack, and symlink it into `~/dev/miniupnpc/`. Finally, we can build i2pd with all that goodness ```sh git clone https://github.com/PurpleI2P/i2pd mkdir i2pd-mingw-64-build cd i2pd-mingw-64-build BOOST_ROOT=~/dev/boost_1_60_0 cmake -G 'Unix Makefiles' ~/dev/i2pd/build -DBUILD_TYPE=Release \ -DCMAKE_TOOLCHAIN_FILE=~/dev/toolchain-mingw.cmake -DWITH_AESNI=ON -DWITH_UPNP=ON -DWITH_STATIC=ON \ -DWITH_HARDENING=ON -DCMAKE_INSTALL_PREFIX:PATH=~/dev/i2pd-mingw-64-static \ -DZLIB_ROOT=~/dev/stage -DBOOST_LIBRARYDIR:PATH=~/dev/boost_1_60_0/stage-mingw-64/lib \ -DOPENSSL_ROOT_DIR:PATH=~/dev/stage make x86_64-w64-mingw32-strip i2pd.exe ``` By now, you should have a release build with stripped symbols.