Cross Compile to Windows From Linux

[RadhiFadlillah]

As title said, I'm trying to cross compile my app from Ubuntu 64-bit to Windows 32-bit. From issue 106 in go-sqlite3, I've tried this command :

env CGO_ENABLED=1 GOOS=windows GOARCH=386 CC=i686-w64-mingw32-gcc go build

But it failed with this result :

# github.com/xeodou/go-sqlcipher
../github.com/xeodou/go-sqlcipher/sqlite3-binding.c:18280:26: fatal error: openssl/rand.h: No such file or directory
compilation terminated.

[RadhiFadlillah]

Nevermind guys, I've got it.

1. Install mingw :

   sudo apt install gcc-mingw-w64

   In Ubuntu 16.04, it will install 64-bit libraries in /usr/x86_64-w64-mingw32 and 32-bit libraries in /usr/i686-w64-mingw32.

2. Download source code for OpenSSL 1.0.2j here then extract it. Use OpenSSL v1.0.2 because SQLCipher use it.

3. Cross compile OpenSSL for Windows 32-bit

   In terminal, go to extracted folder, then run configure script to use 32-bit Windows compiler :

   ./Configure mingw shared --cross-compile-prefix=i686-w64-mingw32- --prefix=/usr/i686-w64-mingw32

   After that, run make and sudo make install. After installation finished, I can cross compile my Go app to Windows 32-bit successfully using this command :

   env CGO_ENABLED=1 GOOS=windows GOARCH=386 CC=i686-w64-mingw32-gcc go build

4. [BONUS] Cross compile OpenSSL for Windows 64-bit

   Go to extracted folder, then run configure script to use 64-bit Windows compiler :

   ./Configure mingw64 shared --cross-compile-prefix=x86_64-w64-mingw32- --prefix=/usr/x86_64-w64-mingw32

   Run make and sudo make install. After installation finished, I can cross compile my Go app to Windows 64-bit successfully :

   env CGO_ENABLED=1 GOOS=windows GOARCH=amd64 CC=x86_64-w64-mingw32-gcc go build