Files
source/ext/lua-5.1.5
76eda883a5 build Lua from vendored source instead of the prebuilt lua51.lib
The tree carried two prebuilt Lua static libraries and a copy of the Lua
public headers. lua51.lib is 5.1.2 and matched the headers; lua51.vc9.lib
is 5.1.4 and was dead weight — it came second in Ja2_Libraries, so the
linker resolved every Lua symbol out of lua51.lib and never pulled an
object from it. Just as well, since it asks for /DEFAULTLIB:MSVCRT while
we build /MT.

ext/lua-5.1.5 is the upstream tarball unmodified, built as lua51 the way
the other vendored libraries are, and its src directory replaces lua/ as
the home of lua.h, luaconf.h, lauxlib.h and lualib.h. Those four headers
were stock 5.1.2 retabbed, so 5.1.5 is bugfix-only against what the game
compiled against; the bytecode format is unchanged across 5.1.x and every
script under gamedir is plain source anyway. lua/lua.hpp had no includers
and returns to etc/ where upstream keeps it.

/SAFESEH:NO goes with it. Its two stated reasons were lua51.lib and the
smackw32 import library, and both are now gone: every remaining prebuilt
static library is SAFESEH-clean (libexpatMT.lib 5 of 5 members with
@feat.00 = 0x1, RakNetLibStatic.lib 79 of 79), and lld-link emits a
3155-entry SEHandlerTable without it.

The /MT comment blamed the wrong library. lua51.lib carried no linker
directives at all; RakNetLibStatic.lib is what pins us to the static
runtime, with /DEFAULTLIB:LIBCMT and /DEFAULTLIB:libcpmt.

Verified by building all four applications in Debug and Release, and by
linking the tarball's own lua.c against our lua51.lib with the build's
clang-cl flags and running it under Wine: 5.1 stdlib, GC, coroutines and
the x86 __asm fld/fistp lua_number2int fast path all behave. The game
itself could not be launched here — this checkout's gamedir has loose
Data directories but no SLF archives, so VFS aborts on Data\Ambient.slf
long before any script runs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-07-30 13:25:35 -03:00
..

README for Lua 5.1

See INSTALL for installation instructions.
See HISTORY for a summary of changes since the last released version.

* What is Lua?
  ------------
  Lua is a powerful, light-weight programming language designed for extending
  applications. Lua is also frequently used as a general-purpose, stand-alone
  language. Lua is free software.

  For complete information, visit Lua's web site at http://www.lua.org/ .
  For an executive summary, see http://www.lua.org/about.html .

  Lua has been used in many different projects around the world.
  For a short list, see http://www.lua.org/uses.html .

* Availability
  ------------
  Lua is freely available for both academic and commercial purposes.
  See COPYRIGHT and http://www.lua.org/license.html for details.
  Lua can be downloaded at http://www.lua.org/download.html .

* Installation
  ------------
  Lua is implemented in pure ANSI C, and compiles unmodified in all known
  platforms that have an ANSI C compiler. In most Unix-like platforms, simply
  do "make" with a suitable target. See INSTALL for detailed instructions.

* Origin
  ------
  Lua is developed at Lua.org, a laboratory of the Department of Computer
  Science of PUC-Rio (the Pontifical Catholic University of Rio de Janeiro
  in Brazil).
  For more information about the authors, see http://www.lua.org/authors.html .

(end of README)