From 7af5f76227330504d4d16234488c1118d4409621 Mon Sep 17 00:00:00 2001
From: Yolanda Robla <yolanda.robla@canonical.com>
Date: Wed, 17 Jul 2013 13:02:00 +0200
Subject: [PATCH] Upgrade to lua 5.2

See https://bugs.launchpad.net/ubuntu/+source/lua5.2/+bug/1196921
---
 bindings/lua/rrdlua.c |  4 ++--
 configure.ac          |  4 ++--
 m4/acinclude.m4       | 28 ++++++++++++++++++++++++++++
 3 files changed, 32 insertions(+), 4 deletions(-)

diff --git a/bindings/lua/rrdlua.c b/bindings/lua/rrdlua.c
index bfbc174b..baac444d 100644
--- a/bindings/lua/rrdlua.c
+++ b/bindings/lua/rrdlua.c
@@ -350,7 +350,7 @@ set_info (lua_State * L)
 
 /**********************************************************/
 
-static const struct luaL_reg rrd[] = {
+static const struct luaL_Reg rrd[] = {
   {"create", lua_rrd_create},
   {"dump", lua_rrd_dump},
   {"fetch", lua_rrd_fetch},
@@ -383,7 +383,7 @@ luaopen_rrd (lua_State * L)
   /* luaL_module is defined in compat-5.1.c */
   luaL_module (L, "rrd", rrd, 0);
 #else
-  luaL_register (L, "rrd", rrd);
+  luaL_newlib (L, rrd);
 #endif
   set_info (L);
   return 1;
diff --git a/configure.ac b/configure.ac
index 3fabcf4f..a56b6555 100644
--- a/configure.ac
+++ b/configure.ac
@@ -810,8 +810,8 @@ LUA_EOF
       LIBS=
       lua_havelib=no
       LUA_HAVE_COMPAT51=DONT_HAVE_COMPAT51
-      AC_SEARCH_LIBS(lua_call, lua$lua_vdot lua$lua_vndot lua,
-        [AC_SEARCH_LIBS(luaL_register, lua$lua_vdot lua$lua_vndot lua,
+      RRD_SEARCH_LIBS(lua_call, [#include <${lua_headerdir:+$lua_headerdir/}lua.h>], [0, 0, 0], lua$lua_vdot lua$lua_vndot lua,
+        [AC_SEARCH_LIBS(luaL_openlibs, lua$lua_vdot lua$lua_vndot lua,
           [lua_havelib=LUA$lua_vndot],
           [AC_SEARCH_LIBS(luaL_module, lualib$lua_vndot lualib$lua_vdot lualib,
             [lua_havelib=$lua_vndot; $LUA -l compat-5.1 2>/dev/null;
diff --git a/m4/acinclude.m4 b/m4/acinclude.m4
index bf7271d5..c3320f67 100644
--- a/m4/acinclude.m4
+++ b/m4/acinclude.m4
@@ -612,3 +612,31 @@ AC_DEFUN([GC_TIMEZONE], [
                 fi
         fi
 ])
+
+dnl Like AC_SEARCH_LIBS, but allowing specifying a prologue and arguments so
+dnl that macros expand correctly.
+AC_DEFUN([RRD_SEARCH_LIBS],
+[AS_VAR_PUSHDEF([rrd_Search], [rrd_cv_search_$1])dnl
+AC_CACHE_CHECK([for library containing $1], [rrd_Search],
+[rrd_func_search_save_LIBS=$LIBS
+AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$1 ($3);])])
+for rrd_lib in '' $4; do
+  if test -z "$rrd_lib"; then
+    rrd_res="none required"
+  else
+    rrd_res=-l$rrd_lib
+    LIBS="-l$rrd_lib $7 $rrd_func_search_save_LIBS"
+  fi
+  AC_LINK_IFELSE([], [AS_VAR_SET([rrd_Search], [$rrd_res])])
+  AS_VAR_SET_IF([rrd_Search], [break])
+done
+AS_VAR_SET_IF([rrd_Search], , [AS_VAR_SET([rrd_Search], [no])])
+rm conftest.$ac_ext
+LIBS=$rrd_func_search_save_LIBS])
+AS_VAR_COPY([rrd_res], [rrd_Search])
+AS_IF([test "$rrd_res" != no],
+  [test "$rrd_res" = "none required" || LIBS="$rrd_res $LIBS"
+  $5],
+      [$6])
+AS_VAR_POPDEF([rrd_Search])dnl
+])
-- 
2.47.2