Simpler build system for Windows

[chalcolith]

The Premake build system on Windows has been replaced with WAF, and the only dependency (other than Visual Studio and the Windows SDK) is Python.

The system depends on pre-built libraries for LLVM, LibreSSL and PCRE2 currently located at https://github.com/kulibali/ponyc-windows-libs/releases (these are created by an appveyor build; replaces the manual ponyc-windows-llvm releases).

Building on Windows requires the following:

• Visual Studio 2015; make sure that a Windows 10 SDK is installed; otherwise install it from here.
• Python (3.5 or 2.7) needs to be in your PATH.

In a command prompt in the ponyc source directory, run the following:

> make.bat configure

(You only need to run this the first time you build the project.)

> make.bat build test

This will automatically perform the following steps:

• Download some pre-built libraries used for building the Pony compiler and standard library.
  • LLVM
  • LibreSSL
  • PCRE
• Build the pony compiler in the build-<config>-<llvm-version> directory.
• Build the unit tests for the compiler and the standard library.
• Run the unit tests.

You can provide the following options to make.bat when running the build or test commands:

• --config debug|release: whether or not to build a debug or release build (debug is the default).
• --llvm <version>: the LLVM version to build against (3.9.1 is the default).

e.g:

> make.bat build test --config release --llvm 3.9.1

Note that you need to provide these options each time you run make.bat; the system will not remember your last choice.

Other commands include clean, which will clean a specified configuration; and distclean, which will wipe out the entire build directory. You will need to run make configure after a distclean.

[Theodus]

Looks good to me, and it works on my Windows machine unlike the last build system.

[jemc]

Thank you!

[chalcolith]

No worries! The only thing I dislike more than developing simple build systems is working with complicated build systems.