Works! Tested on Linux and OSX. Even searches in lib for dependencies

CMakeLists.txt

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+# Copyright (C) 2011 LuaDist.
+# Created by Peter Drahoš
+# Redistribution and use of this file is allowed according to the terms of the MIT license.
+# For details see the COPYRIGHT file distributed with LuaDist.
+# Please note that the package source code is licensed under its own license.
+
+project ( luarocks NONE )
+cmake_minimum_required ( VERSION 2.6 )
+include ( dist.cmake )
+
+## settings
+set ( LUA_INCDIR ${INSTALL_INC} )
+set ( LUA_LIBDIR ${INSTALL_LIB} )
+set ( LUA_BINDIR ${INSTALL_BIN} )
+set ( LUA_INTERPRETER lua )
+set ( LUA_SUFFIX "51" )
+
+set ( LUAROCKS_SYSCONFIG ${INSTALL_ETC} )
+set ( LUAROCKS_ROCKS_TREE ${INSTALL_DATA}/rocks )
+
+# System detection
+set ( LUAROCKS_UNAME_S Unix CACHE STRING "Detected system.")
+if ( CYGWIN )
+  set ( LUAROCKS_UNAME_S CYGWIN )
+elseif ( MINGW )
+  set ( LUAROCKS_UNAME_S MINGW )
+elseif ( WIN32 )
+  set ( LUAROCKS_UNAME_S Windows )
+elseif ( LINUX )
+  set ( LUAROCKS_UNAME_S Linux )
+elseif ( APPLE )
+  set ( LUAROCKS_UNAME_S Darwin )
+endif ()
+
+# Architecture detection
+set ( LUAROCKS_UNAME_M x86 CACHE STRING "Detected architecture." )
+if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
+   set ( LUAROCKS_UNAME_M x86_64 )
+endif ()
+
+set ( LUAROCKS_DOWNLOADER curl )
+set ( LUAROCKS_MD5CHECKER md5sum )
+set ( LUAROCKS_FORCE_CONFIG true )
+configure_file ( config.in ${CMAKE_CURRENT_BINARY_DIR}/config.lua @ONLY )
+
+install ( DIRECTORY src/luarocks DESTINATION ${INSTALL_LMOD} )
+install_lua_module ( luarocks.config ${CMAKE_CURRENT_BINARY_DIR}/config.lua )
+install_lua_executable ( luarocks src/bin/luarocks )  
+install_lua_executable ( luarocks-admin src/bin/luarocks-admin )  
+
+install_data ( COPYING README.md )
+install_data ( COPYING INTO rocks )
+install_test ( test/ )

config.in

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+-- This file was automatically generated by LuaDist
+local root = [[@CMAKE_INSTALL_PREFIX@/]]
+
+-- LuaDist specific "relarive" root
+if _PROGDIR then
+  root = _PROGDIR .. "/../"
+end
+
+module("luarocks.config")
+
+-- Lua
+LUA_DIR=root
+LUA_INCDIR=LUA_DIR .. [[@LUA_INCDIR@]]
+LUA_LIBDIR=LUA_DIR .. [[@LUA_LIBDIR@]]
+LUA_BINDIR=LUA_DIR .. [[@LUA_BINDIR@]]
+LUA_INTERPRETER=[[@LUA_INTERPRETER@]]
+LUA_SUFFIX=[[@LUA_SUFFIX@]]
+
+-- LuaRocks
+LUAROCKS_PREFIX=root
+LUAROCKS_SYSCONFIG=LUAROCKS_PREFIX .. [[@LUAROCKS_SYSCONFIG@]]
+LUAROCKS_ROCKS_TREE=LUAROCKS_PREFIX .. [[@LUAROCKS_ROCKS_TREE@]]
+LUAROCKS_UNAME_M=[[@LUAROCKS_UNAME_M@]]
+LUAROCKS_UNAME_S=[[@LUAROCKS_UNAME_S@]]
+--LUAROCKS_DOWNLOADER=[[@LUAROCKS_DOWNLOADER@]]
+--LUAROCKS_MD5CHECKER=[[@LUAROCKS_MD5CHECKER@]]
+LUAROCKS_FORCE_CONFIG=@LUAROCKS_FORCE_CONFIG@