# Copyright (C) 2007-2015 LuaDist.
# Created by Peter Drahoš, Peter Kapec
# 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 ( lua C )
cmake_minimum_required ( VERSION 2.8 )

# ceph: something in here causes libgmock_main to be built as a shared
# library, likely because it is modifying special variables. it doesn't really
# need to be here, it mostly contains a bunch of install/cpack stuff.
#include ( cmake/dist.cmake )

## CONFIGURATION
# Default configuration (we assume POSIX by default)
set ( LUA_PATH "LUA_PATH" CACHE STRING "Environment variable to use as package.path." )
set ( LUA_CPATH "LUA_CPATH" CACHE STRING "Environment variable to use as package.cpath." )
set ( LUA_INIT "LUA_INIT" CACHE STRING "Environment variable for initial script." )

option ( LUA_USE_C89 "Use only C89 features." OFF )
option ( LUA_USE_RELATIVE_LOADLIB "Use modified loadlib.c with support for relative paths on posix systems." ON )

# Ceph: turn off compatibility with older Lua versions
option ( LUA_COMPAT_5_1 "Enable backwards compatibility options with lua-5.1." OFF)
option ( LUA_COMPAT_5_2 "Enable backwards compatibility options with lua-5.2." OFF)

#2DO: LUAI_* and LUAL_* settings, for now defaults are used.
set ( LUA_DIRSEP "/" )
set ( LUA_MODULE_SUFFIX ${CMAKE_SHARED_MODULE_SUFFIX} )
set ( LUA_LDIR ${INSTALL_LMOD} )
set ( LUA_CDIR ${INSTALL_CMOD} )

if ( LUA_USE_RELATIVE_LOADLIB )
  # This will set up relative paths to lib
  string ( REGEX REPLACE "[^!/]+" ".." LUA_DIR "!/${INSTALL_BIN}/" )
else ( )
  # Direct path to installation
  set ( LUA_DIR ${CMAKE_INSTALL_PREFIX} CACHE STRING "Destination from which modules will be resolved. See INSTALL_LMOD and INSTALL_CMOD." )
endif ( )

set ( LUA_PATH_DEFAULT "./?.lua;${LUA_DIR}${LUA_LDIR}/?.lua;${LUA_DIR}${LUA_LDIR}/?/init.lua" )
set ( LUA_CPATH_DEFAULT "./?${LUA_MODULE_SUFFIX};${LUA_DIR}${LUA_CDIR}/?${LUA_MODULE_SUFFIX};${LUA_DIR}${LUA_CDIR}/loadall${LUA_MODULE_SUFFIX}" )

if ( WIN32 AND NOT CYGWIN )
  # Windows systems
  option ( LUA_USE_WINDOWS "Windows specific build." ON )
  option ( LUA_BUILD_WLUA "Build wLua interpretter without console output." ON )
  option ( LUA_BUILD_AS_DLL "Build Lua library as Dll." ${BUILD_SHARED_LIBS} )

  # Paths (Double escapes needed)
  set ( LUA_DIRSEP "\\\\" )
  string ( REPLACE " /" ${LUA_DIRSEP} LUA_DIR "${LUA_DIR}" )
  string ( REPLACE "/" ${LUA_DIRSEP} LUA_LDIR "${LUA_LDIR}" )
  string ( REPLACE "/" ${LUA_DIRSEP} LUA_CDIR "${LUA_CDIR}" )
  string ( REPLACE "/" ${LUA_DIRSEP} LUA_PATH_DEFAULT "${LUA_PATH_DEFAULT}" )
  string ( REPLACE "/" ${LUA_DIRSEP} LUA_CPATH_DEFAULT "${LUA_CPATH_DEFAULT}" )
else ( )
  # Posix systems (incl. Cygwin)
  option ( LUA_USE_POSIX "Use POSIX features." ON )
  option ( LUA_USE_DLOPEN "Use dynamic linker to load modules." ON )
  # Apple and Linux specific
  if ( LINUX OR APPLE )
    option ( LUA_USE_AFORMAT "Assume 'printf' handles 'aA' specifiers" ON )
  endif ( )
endif ( )

# ceph: readline is only needed for the cli
## SETUP
# Optional libraries
#find_package ( Readline )
#if ( READLINE_FOUND )
#  option ( LUA_USE_READLINE "Use readline in the Lua CLI." ON )
#endif ( )

# Setup needed variables and libraries
if ( LUA_USE_POSIX )
  # On POSIX Lua links to standard math library "m"
  list ( APPEND LIBS m )
endif ( )

if ( LUA_USE_DLOPEN )
  # Link to dynamic linker library "dl"
	find_library ( DL_LIBRARY NAMES dl )
	if ( DL_LIBRARY )
    list ( APPEND LIBS ${DL_LIBRARY} )
	endif ( )
endif ( )

if ( LUA_USE_READLINE )
  # Add readline
  include_directories ( ${READLINE_INCLUDE_DIR} )
  list ( APPEND LIBS ${READLINE_LIBRARY} )
endif ( )

## SOURCES
# Generate luaconf.h
configure_file ( src/luaconf.h.in ${CMAKE_CURRENT_BINARY_DIR}/luaconf.h )

# Sources and headers
include_directories ( src ${CMAKE_CURRENT_BINARY_DIR} )
set ( SRC_CORE src/lapi.c src/lcode.c src/lctype.c src/ldebug.c src/ldo.c src/ldump.c
  src/lfunc.c src/lgc.c src/llex.c src/lmem.c src/lobject.c src/lopcodes.c src/lparser.c
  src/lstate.c src/lstring.c src/ltable.c src/ltm.c src/lundump.c src/lvm.c src/lzio.c )
set ( SRC_LIB src/lauxlib.c src/lbaselib.c src/lbitlib.c src/lcorolib.c src/ldblib.c
  src/liolib.c src/lmathlib.c src/loslib.c src/lstrlib.c src/ltablib.c src/linit.c
  src/lutf8lib.c )
set ( SRC_LUA src/lua.c )
set ( SRC_LUAC src/luac.c )

if ( LUA_USE_RELATIVE_LOADLIB )
  # Use modified loadlib
  list ( APPEND SRC_LIB src/loadlib_rel.c )
else ( )
  list ( APPEND SRC_LIB src/loadlib.c )
endif ( )

## BUILD
# Create lua library
add_library ( liblua STATIC ${SRC_CORE} ${SRC_LIB} ${LUA_DLL_RC} )
target_link_libraries ( liblua ${LIBS} )
# Ceph: add includes path to liblua users
target_include_directories(liblua PUBLIC src ${CMAKE_CURRENT_BINARY_DIR})
# Ceph: only need the logical name
set_target_properties ( liblua PROPERTIES OUTPUT_NAME lua CLEAN_DIRECT_OUTPUT 1 )
if ( LUA_BUILD_AS_DLL )
  set_target_properties ( liblua PROPERTIES COMPILE_DEFINITIONS LUA_BUILD_AS_DLL )
endif ()

# Ceph: don't build Lua executable
#add_executable ( lua ${SRC_LUA} src/lua.rc )
#target_link_libraries ( lua liblua )

# Ceph: don't build Lua executable
#add_executable ( luac ${SRC_CORE} ${SRC_LIB} ${SRC_LUAC} src/luac.rc )
#target_link_libraries ( luac ${LIBS} )

# Ceph: dont' build Lua executable
# On windows a variant of the lua interpreter without console output needs to be built
#if ( LUA_BUILD_WLUA )
#  add_executable ( wlua WIN32 src/wmain.c ${SRC_LUA} src/lua.rc )
#  target_link_libraries ( wlua liblua )
#  install_executable ( wlua )
#endif ( )

# Ceph: Lua is built as a convenience library; don't install anything
#install_executable ( lua luac )
#install_library ( liblua )
#install_data ( README.md )
#install_lua_module ( strict etc/strict.lua )
#install_header ( src/lua.h src/lualib.h src/lauxlib.h src/lua.hpp ${CMAKE_CURRENT_BINARY_DIR}/luaconf.h )
#install_doc ( doc/ )
#install_foo ( etc/ )
#install_test ( test/ )