lqml/readme-prepare-ios.md

Define environment variable and alias

Put this in e.g. ~/.profile:

  export ECL_IOS='<path-to-cross-compiled-ecl>/ecl-ios'

  alias qmake-ios='<path-to-qt5.15>/ios/bin/qmake'

(Use source ~/.profile to make new environment variables take effect immediately in your current terminal session.)

Build cross-compiled ECL for iOS

• extract a fresh copy of the ECL sources in e.g. ~/ecl, and rename ecl-21.2.1 to ios
• copy the 2 scripts from platforms/ios/build-ecl/ to ~/ecl/ios/
• run first script

  ./1-make-ecl-host.sh

Edit src/c/unixsys.d and search for HAVE_SYSTEM; right before the function definition inside which it occurs, put this line:

  #undef HAVE_SYSTEM

Edit src/c/thread/process.d, search for pthread_attr_init (around line 588) and add the following below that line:

  pthread_attr_setstacksize(&pthreadattr, 2 * 236 * 4096); // double default size

• run second script

  ./2-make-ecl-ios.sh

Now you should have your cross-compiled ECL under ~/ecl/ios/ecl-ios/, and your host ECL (for cross-compiling) under ~/ecl/ios/ecl-ios-host/.

Build for iOS Simulator (optional)

Note: only tested on Intel.

For this to work, you will need to upgrade your gmp library to the latest version (tested with gmp 6.2.1). Just substitute it in src/gmp.

• run second script again, passing sim

  ./2-make-ecl-ios.sh sim

This will first compile for the simulator, then combine both versions to universal binaries.