From bc3ece44c91b2c3d2a89abb247df359d4c2f44c8 Mon Sep 17 00:00:00 2001
From: dmiller <dmiller@e0a8ed71-7df4-0310-8962-fdc924857419>
Date: Thu, 7 Jan 2016 05:45:47 +0000
Subject: [PATCH] Check for Lua 5.2 instead of Lua >=5.2. Closes #259

---
 configure    | 7 ++++---
 configure.ac | 5 +++--
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/configure b/configure
index 335648146..fe8725bd9 100755
--- a/configure
+++ b/configure
@@ -6803,8 +6803,9 @@ ac_compile='$CXX -c $CXXFLAGS $CPPFLAGS conftest.$ac_ext >&5'
 ac_link='$CXX -o conftest$ac_exeext $CXXFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
-    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for lua version >= 502" >&5
-$as_echo_n "checking for lua version >= 502... " >&6; }
+    # We need Lua 5.2 exactly
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking for lua version == 502" >&5
+$as_echo_n "checking for lua version == 502... " >&6; }
 
 if test "$cross_compiling" = yes; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: cross-compiling -- assuming yes" >&5
@@ -6816,7 +6817,7 @@ else
 int
 main ()
 {
-if(LUA_VERSION_NUM < 502) return 1;
+if(LUA_VERSION_NUM != 502) return 1;
   ;
   return 0;
 }
diff --git a/configure.ac b/configure.ac
index 8d5959bdb..0fc7e4822 100644
--- a/configure.ac
+++ b/configure.ac
@@ -642,10 +642,11 @@ else
     )
 
     AC_LANG_PUSH(C++)
-    AC_MSG_CHECKING([for lua version >= 502])
+    # We need Lua 5.2 exactly
+    AC_MSG_CHECKING([for lua version == 502])
     AC_RUN_IFELSE([ AC_LANG_PROGRAM(
       [[#include <lua.h>]],
-      [[if(LUA_VERSION_NUM < 502) return 1;]])],
+      [[if(LUA_VERSION_NUM != 502) return 1;]])],
       have_lua=yes, have_lua=no, AC_MSG_RESULT(cross-compiling -- assuming yes); have_lua=yes)
     AC_LANG_POP(C++)