luaU_dump() and #define LUAI_FUNC __attribute__((visibility("hidden"))) extern

[Дилян Палаузов <dilyan.palauzov@...>]

Hello,

I noticed, that as of lua522 in src/luaconf.h LUAI_FUNC and LUAI_DDEC 
expand to __attribute__((visibility("hidden")) .

In lundump.h the function luaU_dump is annotated with LUAI_FUNC aka as 
visibility("hidden").
In lopcodes.h the functions luaP_opnames and luaP_opmodes are annotated 
with visibility("hidden"), too.

So if liblua was a shared library, the luaU_dumo, luaP_opmodes and 
luaP_opcodes would be strictly hidden symbols, that cannot be access out 
of liblua .

However, when linking luac.c with (a shared) liblua there is a problem: 
luac.c needs the symbols luaU_dump, and via the macros getBMode/getCMode 
also the symbols luaP_opcoded and luaP_opmodes.  This does not work, as 
the latter symbols are not exported from liblua.so .

As luaU_dump(), luaP_opcodes and luaP_opmodes are used out of liblua, 
these shall not be marked with visibility("hidden") in the respective .h 
files.  I kindly ask you to fix that.

Със здраве
  Дилян