-include(./FindLua)
-find_program(HAVE_LUA_BIN NAMES lua)
-mark_as_advanced(HAVE_LUA_BIN)
+# Search for the Lua 5.3 include files and libraries
+#
+# Input variable:
+# LUA_HINT: path to Lua installation -- only needed for non-standard installs
+# Output variable:
+# HAVE_LUA : if Lua was found
+# LUA_LIBRARY : the path to the dynamic library
+# LUA_INCLUDE_DIR : where to find lua.h
+# LUA_VERSION_MAJOR: First part of the version (often, 5)
+# LUA_VERSION_MINOR: Second part of the version (3 when we have 5.3)
-message(STATUS "Looking for lua.h")
-if(LUA_INCLUDE_DIR)
- message(STATUS "Looking for lua.h - found")
-else()
- message(STATUS "Looking for lua.h - not found")
-endif()
+find_path(LUA_INCLUDE_DIR lua.h
+ HINTS
+ ENV LUA_HINT
+ PATH_SUFFIXES include/lua53 include/lua5.3 include/lua-5.3 include/lua include
+ PATHS
+ ~/Library/Frameworks
+ /Library/Frameworks
+ /sw # Fink
+ /opt/local # DarwinPorts
+ /opt/csw # Blastwave
+ /opt
+)
-if(HAVE_LUA_BIN)
- message(STATUS "Found Lua: ${HAVE_LUA_BIN}")
+find_library(LUA_LIBRARY
+ NAMES lua53 lua5.3 lua-5.3 lua
+ HINTS
+ ENV LUA_HINT
+ PATH_SUFFIXES lib
+ PATHS
+ ~/Library/Frameworks
+ /Library/Frameworks
+ /sw
+ /opt/local
+ /opt/csw
+ /opt
+)
+if (NOT LUA_LIBRARY)
+ message(FATAL_ERROR "Error: Lua library not found. Please install that package (and set LUA_HINT) or disable Lua.")
endif()
-
-set(LIB_LUA_NAME "")
-
-foreach(lib_path ${LUA_LIBRARIES})
- if(NOT LIB_LUA_NAME)
- string(REGEX MATCH "liblua.*$" LIB_LUA_NAME "${lib_path}")
- string(REPLACE ".${LIB_EXE}" "" LIB_LUA_NAME "${LIB_LUA_NAME}")
- string(REPLACE "lib" "" LIB_LUA_NAME "${LIB_LUA_NAME}")
- if(LIB_LUA_NAME)
- string(REPLACE "/lib${LIB_LUA_NAME}.${LIB_EXE}" "" LUA_LIBRARY_DIR ${lib_path})
- endif()
- endif()
-endforeach(lib_path ${LUA_LIBRARIES})
-
-message(STATUS "Looking for lib lua")
-if(LUA_LIBRARY_DIR)
- message(STATUS "Looking for lib lua - found")
- message(STATUS "Lua version: ${LUA_VERSION_STRING}")
- message(STATUS "Lib path : ${LUA_LIBRARY_DIR}")
-else()
- message(STATUS "Looking for lib lua - not found")
+if (NOT LUA_INCLUDE_DIR OR NOT EXISTS "${LUA_INCLUDE_DIR}/lua.h")
+ message(FATAL_ERROR "Error: Lua header file not found. Please install that package (and set LUA_HINT) or disable Lua.")
endif()
-if(LUA_FOUND)
- if(LUA_VERSION_MAJOR EQUAL 5 AND LUA_VERSION_MINOR EQUAL 3)
- set(HAVE_LUA 1)
- include_directories(${LUA_INCLUDE_DIR})
- link_directories(${LUA_LIBRARY_DIR})
- else()
- message(FATAL_ERROR "Error: Lua version 5.3 is required, but version ${LUA_VERSION_STRING} found instead.")
- endif()
+# Extract the version info out of the header file
+file(STRINGS "${LUA_INCLUDE_DIR}/lua.h" lua_version_str REGEX "^#define[ \t]+LUA_VERSION_MAJOR[ \t]+\"[456]+\"")
+ string(REGEX REPLACE "^#define[ \t]+LUA_VERSION_MAJOR[ \t]+\"([^\"]+)\"" "\\1" LUA_VERSION_MAJOR "${lua_version_str}")
+file(STRINGS "${LUA_INCLUDE_DIR}/lua.h" lua_version_str REGEX "^#define[ \t]+LUA_VERSION_MINOR[ \t]+\"[0123456789]+\"")
+ string(REGEX REPLACE "^#define[ \t]+LUA_VERSION_MINOR[ \t]+\"([^\"]+)\"" "\\1" LUA_VERSION_MINOR "${lua_version_str}")
+unset(lua_version_str)
+
+# Check that we have a sufficient version of Lua
+if(LUA_VERSION_MAJOR EQUAL 5 AND LUA_VERSION_MINOR EQUAL 3)
+ set(HAVE_LUA 1)
+
+ include_directories(${LUA_INCLUDE_DIR})
else()
- message(FATAL_ERROR "Error: Lua version 5.3 is required, but Lua not found.")
+ message(FATAL_ERROR "Error: Lua version 5.3 is required, but version ${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR} found instead.")
endif()
+
+message(STATUS "Lua version: ${LUA_VERSION_MAJOR}.${LUA_VERSION_MINOR}")
+message(STATUS "Lua library: ${LUA_LIBRARY}")
