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ok to use #elif' and #if defined()'

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This commit is contained in:
Roberto Ierusalimschy 2003-05-14 18:01:53 -03:00
parent 524ae9fc3d
commit f93051155c
3 changed files with 9 additions and 35 deletions
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12
liolib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 2.41 2003/04/30 20:24:38 roberto Exp roberto $
** $Id: liolib.c,v 2.42 2003/05/14 19:03:43 roberto Exp roberto $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -37,16 +37,12 @@
** by default, posix systems get `popen'
*/
#ifndef USE_POPEN
#ifdef _POSIX_C_SOURCE
#if _POSIX_C_SOURCE >= 2
#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 2
#define USE_POPEN 1
#endif
#endif
#endif
#ifndef USE_POPEN
#else
#define USE_POPEN 0
#endif
#endif

6
llimits.h
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@ -1,5 +1,5 @@
/*
** $Id: llimits.h,v 1.53 2003/04/28 19:26:16 roberto Exp roberto $
** $Id: llimits.h,v 1.54 2003/04/28 19:57:50 roberto Exp roberto $
** Limits, basic types, and some other `installation-dependent' definitions
** See Copyright Notice in lua.h
*/
@ -22,15 +22,13 @@
/* avoid overflows in comparison */
#if INT_MAX-20 < 32760
#define BITS_INT 16
#else
#if INT_MAX > 2147483640L
#elif INT_MAX > 2147483640L
/* machine has at least 32 bits */
#define BITS_INT 32
#else
#error "you must define BITS_INT with number of bits in an integer"
#endif
#endif
#endif
/*

26
loadlib.c
View File

@ -1,5 +1,5 @@
/*
** $Id: loadlib.c,v 1.3 2003/04/02 13:09:14 roberto Exp roberto $
** $Id: loadlib.c,v 1.4 2003/04/07 20:11:53 roberto Exp roberto $
** Dynamic library loader for Lua
** See Copyright Notice in lua.h
*
@ -136,33 +136,13 @@ static int loadlib(lua_State *L)
** Those systems support dlopen, so they should have defined USE_DLOPEN.
** The default (no)implementation gives them a special error message.
*/
#ifdef linux
#define LOADLIB
#endif
#ifdef sun
#define LOADLIB
#endif
#ifdef sgi
#define LOADLIB
#endif
#ifdef BSD
#define LOADLIB
#endif
#ifdef _WIN32
#define LOADLIB
#endif
#ifdef LOADLIB
#undef LOADLIB
#if defined(linux) || defined(sun) || defined(sgi) || defined(BSD) || defined(_WIN32)
#define LOADLIB "`loadlib' not installed (check your Lua configuration)"
#else
#define LOADLIB "`loadlib' not supported"
#endif
static int loadlib(lua_State *L)
{
lua_pushnil(L);