Merge pull request #201 from libRocket/feature/cmake-v2-fixes

Fixes Lua and Freetype searches when using CMake version 2

Build/CMakeLists.txt

@@ -30,6 +30,12 @@ set(PROJECT_VERSION ${LIBROCKET_VERSION_MAJOR}.${LIBROCKET_VERSION_MINOR}.${LIBR
 # Search in the 'cmake' directory for additional CMake modules.
 list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 
+# Old versions of CMake need some updated Modules, but we don't want
+# to override newer versions of CMake which have working versions
+if(CMAKE_MAJOR_VERSION LESS 3)
+	list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/v2fixes)
+endif()
+
 set(CMAKE_DEBUG_POSTFIX  "_d")
 
 #===================================
@@ -112,7 +118,14 @@ ENDIF(WIN32)
 #===================================
 
 # FreeType
-find_package(Freetype REQUIRED)	
+if(CMAKE_MAJOR_VERSION LESS 3)
+	# Freetype changed the layout of its header files, we  need to use 
+	# the FindFreetype module from cmake v3 at least, included here
+	find_package(Freetype-v2fix REQUIRED)	
+else()
+	find_package(Freetype REQUIRED)	
+endif()
+
 if(FREETYPE_FOUND)
 		include_directories(${FREETYPE_INCLUDE_DIRS})
 		link_directories(${FREETYPE_LINK_DIRS})
@@ -145,7 +158,11 @@ endif()
 
 #Lua
 if(BUILD_LUA_BINDINGS)
-    find_package(Lua)
+    if(CMAKE_MAJOR_VERSION LESS 3)
+        find_package(Lua-v2fix)
+    else()
+        find_package(Lua)
+    endif()
     if(LUA_FOUND)
         include_directories(${LUA_INCLUDE_DIR})
         list(APPEND LUA_BINDINGS_LINK_LIBS ${LUA_LIBRARIES})

Build/cmake/v2fixes/FindFreetype-v2fix.cmake

@@ -0,0 +1,142 @@
+#.rst:
+# FindFreetype
+# ------------
+#
+# Locate FreeType library
+#
+# This module defines
+#
+# ::
+#
+#   FREETYPE_LIBRARIES, the library to link against
+#   FREETYPE_FOUND, if false, do not try to link to FREETYPE
+#   FREETYPE_INCLUDE_DIRS, where to find headers.
+#   FREETYPE_VERSION_STRING, the version of freetype found (since CMake 2.8.8)
+#   This is the concatenation of the paths:
+#   FREETYPE_INCLUDE_DIR_ft2build
+#   FREETYPE_INCLUDE_DIR_freetype2
+#
+#
+#
+# $FREETYPE_DIR is an environment variable that would correspond to the
+# ./configure --prefix=$FREETYPE_DIR used in building FREETYPE.
+
+#=============================================================================
+# Copyright 2007-2009 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# Created by Eric Wing.
+# Modifications by Alexander Neundorf.
+# This file has been renamed to "FindFreetype.cmake" instead of the correct
+# "FindFreeType.cmake" in order to be compatible with the one from KDE4, Alex.
+
+# Ugh, FreeType seems to use some #include trickery which
+# makes this harder than it should be. It looks like they
+# put ft2build.h in a common/easier-to-find location which
+# then contains a #include to a more specific header in a
+# more specific location (#include <freetype/config/ftheader.h>).
+# Then from there, they need to set a bunch of #define's
+# so you can do something like:
+# #include FT_FREETYPE_H
+# Unfortunately, using CMake's mechanisms like include_directories()
+# wants explicit full paths and this trickery doesn't work too well.
+# I'm going to attempt to cut out the middleman and hope
+# everything still works.
+find_path(FREETYPE_INCLUDE_DIR_ft2build ft2build.h
+  HINTS
+    ENV FREETYPE_DIR
+  PATHS
+    /usr/X11R6
+    /usr/local/X11R6
+    /usr/local/X11
+    /usr/freeware
+    ENV GTKMM_BASEPATH
+    [HKEY_CURRENT_USER\\SOFTWARE\\gtkmm\\2.4;Path]
+    [HKEY_LOCAL_MACHINE\\SOFTWARE\\gtkmm\\2.4;Path]
+  PATH_SUFFIXES include/freetype2 include
+)
+
+find_path(FREETYPE_INCLUDE_DIR_freetype2
+  NAMES
+    freetype/config/ftheader.h
+    config/ftheader.h
+  HINTS
+    ENV FREETYPE_DIR
+  PATHS
+    /usr/X11R6
+    /usr/local/X11R6
+    /usr/local/X11
+    /usr/freeware
+    ENV GTKMM_BASEPATH
+    [HKEY_CURRENT_USER\\SOFTWARE\\gtkmm\\2.4;Path]
+    [HKEY_LOCAL_MACHINE\\SOFTWARE\\gtkmm\\2.4;Path]
+  PATH_SUFFIXES include/freetype2 include
+)
+
+find_library(FREETYPE_LIBRARY
+  NAMES freetype libfreetype freetype219
+  HINTS
+    ENV FREETYPE_DIR
+  PATH_SUFFIXES lib
+  PATHS
+    /usr/X11R6
+    /usr/local/X11R6
+    /usr/local/X11
+    /usr/freeware
+    ENV GTKMM_BASEPATH
+    [HKEY_CURRENT_USER\\SOFTWARE\\gtkmm\\2.4;Path]
+    [HKEY_LOCAL_MACHINE\\SOFTWARE\\gtkmm\\2.4;Path]
+)
+
+# set the user variables
+if(FREETYPE_INCLUDE_DIR_ft2build AND FREETYPE_INCLUDE_DIR_freetype2)
+  set(FREETYPE_INCLUDE_DIRS "${FREETYPE_INCLUDE_DIR_ft2build};${FREETYPE_INCLUDE_DIR_freetype2}")
+  list(REMOVE_DUPLICATES FREETYPE_INCLUDE_DIRS)
+endif()
+set(FREETYPE_LIBRARIES "${FREETYPE_LIBRARY}")
+
+if(EXISTS "${FREETYPE_INCLUDE_DIR_freetype2}/freetype/freetype.h")
+  set(FREETYPE_H "${FREETYPE_INCLUDE_DIR_freetype2}/freetype/freetype.h")
+elseif(EXISTS "${FREETYPE_INCLUDE_DIR_freetype2}/freetype.h")
+  set(FREETYPE_H "${FREETYPE_INCLUDE_DIR_freetype2}/freetype.h")
+endif()
+
+if(FREETYPE_INCLUDE_DIR_freetype2 AND FREETYPE_H)
+    file(STRINGS "${FREETYPE_H}" freetype_version_str
+         REGEX "^#[\t ]*define[\t ]+FREETYPE_(MAJOR|MINOR|PATCH)[\t ]+[0-9]+$")
+
+    unset(FREETYPE_VERSION_STRING)
+    foreach(VPART MAJOR MINOR PATCH)
+        foreach(VLINE ${freetype_version_str})
+            if(VLINE MATCHES "^#[\t ]*define[\t ]+FREETYPE_${VPART}")
+                string(REGEX REPLACE "^#[\t ]*define[\t ]+FREETYPE_${VPART}[\t ]+([0-9]+)$" "\\1"
+                       FREETYPE_VERSION_PART "${VLINE}")
+                if(FREETYPE_VERSION_STRING)
+                    set(FREETYPE_VERSION_STRING "${FREETYPE_VERSION_STRING}.${FREETYPE_VERSION_PART}")
+                else()
+                    set(FREETYPE_VERSION_STRING "${FREETYPE_VERSION_PART}")
+                endif()
+                unset(FREETYPE_VERSION_PART)
+            endif()
+        endforeach()
+    endforeach()
+endif()
+
+
+# handle the QUIETLY and REQUIRED arguments and set FREETYPE_FOUND to TRUE if
+# all listed variables are TRUE
+include(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Freetype
+                                  REQUIRED_VARS FREETYPE_LIBRARY FREETYPE_INCLUDE_DIRS
+                                  VERSION_VAR FREETYPE_VERSION_STRING)
+
+mark_as_advanced(FREETYPE_LIBRARY FREETYPE_INCLUDE_DIR_freetype2 FREETYPE_INCLUDE_DIR_ft2build)