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new macros 'LUAI_DDEC'/'LUAI_DDEF' to better control declarations and

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definitions of non-static variables
This commit is contained in:
Roberto Ierusalimschy
2009-11-19 17:06:52 -02:00
parent b4c1824824
commit 062e809e54
10 changed files with 31 additions and 27 deletions
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16
luaconf.h
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@@ -1,5 +1,5 @@
/*
** $Id: luaconf.h,v 1.113 2009/11/16 15:51:03 roberto Exp roberto $
** $Id: luaconf.h,v 1.114 2009/11/19 16:26:52 roberto Exp roberto $
** Configuration file for Lua
** See Copyright Notice in lua.h
*/
@@ -170,8 +170,9 @@
/*
@@ LUAI_FUNC is a mark for all extern functions that are not to be
@* exported to outside modules.
@@ LUAI_DATA is a mark for all extern (const) variables that are not to
@* be exported to outside modules.
@@ LUAI_DDEF and LUAI_DDEC are marks for all extern (const) variables
@* that are not to be exported to outside modules (LUAI_DDEF for
@* definitions and LUAI_DDEC for declarations).
** CHANGE them if you need to mark them in some special way. Elf/gcc
** (versions 3.2 and later) mark them as "hidden" to optimize access
** when Lua is compiled as a shared library. Not all elf targets support
@@ -182,16 +183,19 @@
*/
#if defined(luaall_c)
#define LUAI_FUNC static
#define LUAI_DATA extern
#define LUAI_DDEC static
#define LUAI_DDEF static
#elif defined(__GNUC__) && ((__GNUC__*100 + __GNUC_MINOR__) >= 302) && \
defined(__ELF__)
#define LUAI_FUNC __attribute__((visibility("hidden"))) extern
#define LUAI_DATA LUAI_FUNC
#define LUAI_DDEC LUAI_FUNC
#define LUAI_DDEF /* empty */
#else
#define LUAI_FUNC extern
#define LUAI_DATA extern
#define LUAI_DDEC extern
#define LUAI_DDEF /* empty */
#endif