[lua] Allow desk tools to use popen

[plugins] Add a -C option to gmake (don't ask)

lua/src/luaconf.h

@@ -680,7 +680,9 @@ union luai_Cast { double l_d; long l_l; };
 @* the file streams.
 ** CHANGE it if you have a way to implement it in your system.
 */
-/*
+
+#ifdef DESKTOP_TOOLS
+
 #if defined(LUA_USE_POPEN)
 
 #define lua_popen(L,c,m)	((void)L, fflush(NULL), popen(c,m))
@@ -698,12 +700,14 @@ union luai_Cast { double l_d; long l_l; };
 #define lua_pclose(L,file)		((void)((void)L, file), 0)
 
 #endif
-*/
+
+#else
 
 #define lua_popen(L,c,m)	((void)((void)c, m),  \
 		luaL_error(L, LUA_QL("popen") " not supported"), (FILE*)0)
 #define lua_pclose(L,file)		((void)((void)L, file), 0)
 
+#endif
 
 
 /*

plugins/gmake.lua

@@ -1173,10 +1173,14 @@ local main = function(args)
         print(docs.help)
         return
 
-      elseif option == "-c" then
-        print("Do you want to create a new skeleton plugin.def.lua file in this directory? (y/n)")
-        local res = io.read()
-        if res:match("^[Yy]$") then
+      elseif option == "-c" or option == "-C" then
+        local proceed = true
+        if option == "-c" then
+          print("Do you want to create a new skeleton plugin.def.lua file in this directory? (y/n)")
+          local res = io.read()
+          proceed=res:match("^[Yy]$")
+        end
+        if proceed then
           local file = io.open("plugin.def.lua", "r")
           if file then
             print("\nplugin.def.lua exists, please check file and delete manually if you really want to overwrite.\n")