What's New in 5.0

Name Changes

• The executable is now named premake5
• The default project script is now premake5.lua; premake4.lua remains as a fallback.

Flags and Actions

• --interactive (open an interactive command prompt)
• vs2012, vs2013, vs2015 (Visual Studio 2012, 2013, 2015)

Major Features

• Custom Rules (still experimental)
• Makefile Projects
• Modules
• Per-Configuration File Lists
• Per-File Configurations
• Per-Project Configurations
• Platforms
• Removes
• System Scripts
• Tokens

New or Modified Globals

• _MAIN_SCRIPT
• _MAIN_SCRIPT_DIR
• _PREMAKE_DIR

New or Modified API calls

• architecture (new)
• buildaction (new values)
• buildcommands (new)
• builddependencies (new)
• buildlog (new)
• buildmessage (new)
• buildoutputs (new)
• cleancommands (new)
• cleanextensions (new)
• clr (new)
• configfile (new)
• configmap (new)
• configuration (retired)
• configurations (modified)
• copylocal (new)
• debugcommand (new)
• debugconnectcommands (new)
• debugextendedprotocol (new)
• debugport (new)
• debugremotehost (new)
• debugsearchpaths (new)
• debugstartupcommands (new)
• dependson (new)
• disablewarnings (new)
• editandcontinue (new)
• enablewarnings (new)
• endian (new)
• external (new)
• externalRule (new)
• fatalwarnings (new)
• fileextension (new)
• filename (new)
• filter (new)
• flags (new values)
• flags (ExcludeFromBuild, LinkTimeOptimization, MultiProcessorCompile, NoBufferSecurityChecks, NoCopyLocal, NoImplicitLink, NoRuntimeChecks)
• floatingpoint (new)
• forceincludes (new)
• forceusings (new)
• fpu (new)
• gccprefix (new)
• group (new)
• icon (new)
• includeExternal (new)
• kind (Makefile, None)
• links
• locale (new)
• namespace (new)
• nativewchar (new)
• objdir (modified)
• optimize (new)
• pic (new)
• platforms (modified)
• postbuildmessage (new)
• prebuildmessage (new)
• prelinkmessage (new)
• project (modified)
• propertyDefinition (new)
• rebuildcommands (new)
• rule (new)
• rules (new)
• solution (modified)
• startproject (new)
• strictaliasing (new)
• [system] (new)
• toolset (new)
• undefines (new)
• vectorextensions (new)
• warnings (new)

New or Modified Lua library calls

• debug.prompt (new)

• os.chmod (new)

• os.islink (new)

• os.realpath (new)

• os.uuid (can now generated deterministic name-based UUIDs)

• path.getabsolute (new "relative to" argument)

• string.hash (new)

Deprecated Values and Functions

• buildrule
• flags: Component, EnableSSE, ExtraWarnings, FloatFast, FloatStrict, Managed, NativeWChar, NoEditAndContinue, NoWarnings, Optimize, Unsafe