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build Lua from vendored source instead of the prebuilt lua51.lib

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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>
This commit is contained in:
Marco Antonio J. Costa
2026-07-30 13:25:35 -03:00
committed by majcosta
co-authored by Claude Opus 5
parent 7f7cf34e26
commit 76eda883a5
107 changed files with 27315 additions and 149 deletions
Download Patch File Download Diff File Expand all files Collapse all files
ext/lua-5.1.5/doc/lua.css
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body {
color: #000000 ;
background-color: #FFFFFF ;
font-family: Helvetica, Arial, sans-serif ;
text-align: justify ;
margin-right: 30px ;
margin-left: 30px ;
}
h1, h2, h3, h4 {
font-family: Verdana, Geneva, sans-serif ;
font-weight: normal ;
font-style: italic ;
}
h2 {
padding-top: 0.4em ;
padding-bottom: 0.4em ;
padding-left: 30px ;
padding-right: 30px ;
margin-left: -30px ;
background-color: #E0E0FF ;
}
h3 {
padding-left: 0.5em ;
border-left: solid #E0E0FF 1em ;
}
table h3 {
padding-left: 0px ;
border-left: none ;
}
a:link {
color: #000080 ;
background-color: inherit ;
text-decoration: none ;
}
a:visited {
background-color: inherit ;
text-decoration: none ;
}
a:link:hover, a:visited:hover {
color: #000080 ;
background-color: #E0E0FF ;
}
a:link:active, a:visited:active {
color: #FF0000 ;
}
hr {
border: 0 ;
height: 1px ;
color: #a0a0a0 ;
background-color: #a0a0a0 ;
}
:target {
background-color: #F8F8F8 ;
padding: 8px ;
border: solid #a0a0a0 2px ;
}
.footer {
color: gray ;
font-size: small ;
}
input[type=text] {
border: solid #a0a0a0 2px ;
border-radius: 2em ;
-moz-border-radius: 2em ;
background-image: url('images/search.png') ;
background-repeat: no-repeat;
background-position: 4px center ;
padding-left: 20px ;
height: 2em ;
}