#change UBT will check for API version of all UnrealHeaderTool binaries to detect partial syncs
#change Added BuildHostPlatform class for runtime platform abstraction
[CL 2245408 by Robert Manuszewski in Main branch]
- Part of PR #306 by amigo and #ue4linux folks.
- Undoing my previous change with cross-compilation define (too dangerous).
#codereview Josh.Adams, Michael.Trepka
[CL 2243292 by Dmitry Rekman in Main branch]
- Linux now supports targeting different architecture, with architecture string matching standard target triplet, i.e. "x86_64-unknown-linux-gnu" for generic x86-64 Linux, the only supported platform at the moment.
- All Linux binaries (and other files for which this is important) are under subdirectory whose name matches the target triplet.
- UBT is modified so that architecture names aren't necessarily appended to binaries.
Also removed implicit dependency on libz in the toolchain and made it depend properly on our zlib module.
#codereview Josh.Adams, Daniel.Lamb, Michael.Trepka
[CL 2089848 by Dmitry Rekman in Main branch]
- New target platforms (LinuxNoEditor for client+server, LinuxClient for client, Linux for editor, LinuxServer for dedicated server - mirroring other platforms).
- Preliminary support for gcc in the toolchain (and some safe fixes in code).
- No more lowercasing when accessing files on Linux, tread carefully.
- Changes needed for native compilation and other minor improvements.
#codereview Josh.Adams, Michael.Liebenow, Steve.Robbs
[CL 2067133 by Dmitry Rekman in Main branch]
