commit 0b48e2ea2e11c3fc73bb3ca3215f5642d9411c27

Author: Alexey Tourbin <at@altlinux.ru>

Date:   Wed Oct 11 01:53:19 2006 +0400

    deal with symbol visibility

    Lua uses __attribute__((visibility("hidden"))) to hide non-public API

    symbols in the shared library.  However, luac compiler uses some bits of

    internal API, so I had to link it statically with liblua.a.

    To avoid static linking, I introduce version script with LUAC_PRIVATE

    interface.  It exposes exactly those bits of internal API which are

    sufficient to link luac.  Other bits are hidden with lua[^Lo_] pattern,

    since the library should only export lua_*, luaL_*, and luaopen_* symbols.

    (And there's no at all symbols which do not match lua*.)

 lua5.spec:

  -gcc -shared -o liblua%soffix -Wl,-soname=liblua%soffix -Wl,-z,defs *.o -lm -ldl

  +gcc -shared -o liblua%soffix -Wl,-soname=liblua%soffix -Wl,--version-script=liblua.map -Wl,-z,defs *.o -lm -ldl

diff --git a/src/liblua.map b/src/liblua.map

new file mode 100644

index 0000000..7c60f53

--- /dev/null

+++ b/src/liblua.map

@@ -0,0 +1,13 @@

+LUAC_PRIVATE {

+    global:

+	luaD_growstack;

+	luaF_newproto;

+	luaM_realloc_;

+	luaM_toobig;

+	luaP_opmodes;

+	luaP_opnames;

+	luaS_newlstr;

+	luaU_dump;

+    local:

+	lua[^Lo_]*;

+};

diff --git a/src/luaconf.h b/src/luaconf.h

index 3b939b8..8b370f6 100644

--- a/src/luaconf.h

+++ b/src/luaconf.h

@@ -178,7 +190,10 @@

 ** (versions 3.2 and later) mark them as "hidden" to optimize access

 ** when Lua is compiled as a shared library.

 */

-#if defined(luaall_c)

+#if 1

+#define LUAI_FUNC	extern

+#define LUAI_DATA	extern

+#elif defined(luaall_c)

 #define LUAI_FUNC	static

 #define LUAI_DATA	/* empty */