From: Thierry Fournier <tfournier@arpalert.org>
Date: Sat, 26 Mar 2016 12:19:21 +0000 (+0100)
Subject: BUG/MINOR: lua: can't load external libraries
X-Git-Tag: v1.7-dev3~89
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=85dc1d3995a20af6b404764584357914a41027fb;p=thirdparty%2Fhaproxy.git

BUG/MINOR: lua: can't load external libraries

Libraries requires the export of embedded Lua symbols. If a library
is loaded by HAProxy or by an Lua program, an error like the following
error raises:

   [ALERT] 085/135722 (7224) : parsing [test.cfg:8] : lua runtime error: error loading module 'test' from file './test.so':
        ./test.so: undefined symbol: lua_createtable

This patch modify the Makefile, and allow exports of the Lua symbols.

This patch must be backported in version 1.6
---

diff --git a/Makefile b/Makefile
index 9acbf2bcc2..7d39cfd994 100644
--- a/Makefile
+++ b/Makefile
@@ -597,7 +597,7 @@ check_lua_lib = $(shell echo "int main(){}" | $(CC) -o /dev/null -x c - $(2) -l$
 
 BUILD_OPTIONS   += $(call ignore_implicit,USE_LUA)
 OPTIONS_CFLAGS  += -DUSE_LUA $(if $(LUA_INC),-I$(LUA_INC))
-LUA_LD_FLAGS := $(if $(LUA_LIB),-L$(LUA_LIB))
+LUA_LD_FLAGS := -Wl,--export-dynamic $(if $(LUA_LIB),-L$(LUA_LIB))
 ifeq ($(LUA_LIB_NAME),)
 # Try to automatically detect the Lua library
 LUA_LIB_NAME := $(firstword $(foreach lib,lua5.3 lua53 lua,$(call check_lua_lib,$(lib),$(LUA_LD_FLAGS))))