2 files changed, 21 insertions, 2 deletions

diff --git a/lmathlib.c b/lmathlib.c
index fe01a89d..4999310a 100644
--- a/lmathlib.c
+++ b/lmathlib.c
@@ -1,5 +1,5 @@
 /*
-** $Id: lmathlib.c,v 1.70 2007/06/21 13:48:04 roberto Exp roberto $
+** $Id: lmathlib.c,v 1.71 2009/02/18 13:06:05 roberto Exp roberto $
 ** Standard mathematical library
 ** See Copyright Notice in lua.h
 */
@@ -126,6 +126,10 @@ static int math_log (lua_State *L) {
 }
 
 static int math_log10 (lua_State *L) {
+#if !defined(LUA_COMPAT_LOG10)
+  luaL_error(L, "function " LUA_QL("log10")
+                " is deprecated; use log(x, 10) instead");
+#endif
   lua_pushnumber(L, log10(luaL_checknumber(L, 1)));
   return 1;
 }
diff --git a/luaconf.h b/luaconf.h
index 4f116cd3..9fb62b67 100644
--- a/luaconf.h
+++ b/luaconf.h
@@ -1,5 +1,5 @@
 /*
-** $Id: luaconf.h,v 1.100 2008/07/18 19:58:10 roberto Exp roberto $
+** $Id: luaconf.h,v 1.101 2009/02/07 12:23:15 roberto Exp roberto $
 ** Configuration file for Lua
 ** See Copyright Notice in lua.h
 */
@@ -331,6 +331,19 @@
 
 
 /*
+** {==================================================================
+** Compatibility with previous versions
+** ===================================================================
+*/
+
+/*
+@@ LUA_COMPAT_LOG10 defines the function 'log10' in the math library.
+** CHANGE it (undefine it) if as soon as you rewrite all calls 'log10(x)'
+** as 'log(x, 10)'
+*/
+#define LUA_COMPAT_LOG10
+
+/*
 @@ LUA_COMPAT_API includes some macros and functions that supply some
 @* compatibility with previous versions.
 ** CHANGE it (undefine it) if you do not need these compatibility facilities.
@@ -360,6 +373,8 @@
 */
 #define LUA_COMPAT_DEBUGLIB
 
+/* }================================================================== */
+