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Some compilation options configurable from makefile

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Compilation options LUA_COMPAT_GLOBAL, LUA_COMPAT_LOOPVAR, and
LUA_READLINELIB do not affect the API, so they can be changed
through the make file.
This commit is contained in:
Roberto Ierusalimschy
2026-01-20 13:06:16 -03:00
parent f5d1e8639b
commit e992c6a959
5 changed files with 20 additions and 5 deletions
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2
llex.c
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@@ -188,7 +188,7 @@ void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source,
so they cannot be collected */ so they cannot be collected */
ls->envn = luaS_newliteral(L, LUA_ENV); /* get env string */ ls->envn = luaS_newliteral(L, LUA_ENV); /* get env string */
ls->brkn = luaS_newliteral(L, "break"); /* get "break" string */ ls->brkn = luaS_newliteral(L, "break"); /* get "break" string */
#if defined(LUA_COMPAT_GLOBAL) #if LUA_COMPAT_GLOBAL
/* compatibility mode: "global" is not a reserved word */ /* compatibility mode: "global" is not a reserved word */
ls->glbn = luaS_newliteral(L, "global"); /* get "global" string */ ls->glbn = luaS_newliteral(L, "global"); /* get "global" string */
ls->glbn->extra = 0; /* mark it as not reserved */ ls->glbn->extra = 0; /* mark it as not reserved */

4
lparser.c
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@@ -1685,7 +1685,7 @@ static void forbody (LexState *ls, int base, int line, int nvars, int isgen) {
/* /*
** Control whether for-loop control variables are read-only ** Control whether for-loop control variables are read-only
*/ */
#if defined(LUA_COMPAT_LOOPVAR) #if LUA_COMPAT_LOOPVAR
#define LOOPVARKIND VDKREG #define LOOPVARKIND VDKREG
#else /* by default, these variables are read only */ #else /* by default, these variables are read only */
#define LOOPVARKIND RDKCONST #define LOOPVARKIND RDKCONST
@@ -2120,7 +2120,7 @@ static void statement (LexState *ls) {
gotostat(ls, line); gotostat(ls, line);
break; break;
} }
#if defined(LUA_COMPAT_GLOBAL) #if LUA_COMPAT_GLOBAL
case TK_NAME: { case TK_NAME: {
/* compatibility code to parse global keyword when "global" /* compatibility code to parse global keyword when "global"
is not reserved */ is not reserved */

1
ltests.h
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@@ -14,6 +14,7 @@
/* test Lua with compatibility code */ /* test Lua with compatibility code */
#define LUA_COMPAT_MATHLIB #define LUA_COMPAT_MATHLIB
#undef LUA_COMPAT_GLOBAL #undef LUA_COMPAT_GLOBAL
#define LUA_COMPAT_GLOBAL 0
#define LUA_DEBUG #define LUA_DEBUG

12
luaconf.h
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@@ -70,15 +70,19 @@
#if defined(LUA_USE_LINUX) #if defined(LUA_USE_LINUX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* needs an extra library: -ldl */ #define LUA_USE_DLOPEN /* needs an extra library: -ldl */
#if !defined(LUA_READLINELIB)
#define LUA_READLINELIB "libreadline.so" #define LUA_READLINELIB "libreadline.so"
#endif #endif
#endif
#if defined(LUA_USE_MACOSX) #if defined(LUA_USE_MACOSX)
#define LUA_USE_POSIX #define LUA_USE_POSIX
#define LUA_USE_DLOPEN /* macOS does not need -ldl */ #define LUA_USE_DLOPEN /* macOS does not need -ldl */
#if !defined(LUA_READLINELIB)
#define LUA_READLINELIB "libedit.dylib" #define LUA_READLINELIB "libedit.dylib"
#endif #endif
#endif
#if defined(LUA_USE_IOS) #if defined(LUA_USE_IOS)
@@ -339,14 +343,18 @@
/* /*
@@ LUA_COMPAT_GLOBAL avoids 'global' being a reserved word @@ LUA_COMPAT_GLOBAL avoids 'global' being a reserved word
*/ */
#define LUA_COMPAT_GLOBAL #if !defined(LUA_COMPAT_GLOBAL)
#define LUA_COMPAT_GLOBAL 1
#endif
/* /*
@@ LUA_COMPAT_LOOPVAR makes for-loop control variables not read-only, @@ LUA_COMPAT_LOOPVAR makes for-loop control variables not read-only,
** as they were in previous versions. ** as they were in previous versions.
*/ */
/* #define LUA_COMPAT_LOOPVAR */ #if !defined(LUA_COMPAT_LOOPVAR)
#define LUA_COMPAT_LOOPVAR 0
#endif
/* /*

6
manual/manual.of
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@@ -9594,12 +9594,18 @@ change between versions.
@item{ @item{
The word @Rw{global} is a reserved word. The word @Rw{global} is a reserved word.
Do not use it as a regular name. Do not use it as a regular name.
The compilation option @id{LUA_COMPAT_GLOBAL} (see @id{luaconf.h})
makes @id{global} a regular word.
} }
@item{ @item{
The control variable in @Rw{for} loops is read only. The control variable in @Rw{for} loops is read only.
If you need to change it, If you need to change it,
declare a local variable with the same name in the loop body. declare a local variable with the same name in the loop body.
The compilation option @id{LUA_COMPAT_LOOPVAR} (see @id{luaconf.h})
makes these variables regular (writable).
} }
@item{ @item{