cmake: add patch to fix FindQt4 issue

The FindQt4 module of CMake insists on having uic, even if the QtGui
module isn't part of the requirements to build the program. This isn't
correct, as Qt doesn't build/install the uic program when QtGui is
disabled (uic is used to generate some UI code).

This has been fixed upstream in
http://cmake.org/gitweb?p=cmake.git;a=commit;h=43cb9b8276a70d153d56a69d5c61daaf2bc51b78. This
commit will be part of the upcoming 2.8.4 CMake release, but in the
mean time, let's include it in Buildroot.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/cmake/cmake-2.8.3-qt4-fix.patch

@@ -0,0 +1,257 @@
+The FindQt4 module of CMake insists on having uic, even if the QtGui
+module isn't part of the requirements to build the program. This isn't
+correct, as Qt doesn't build/install the uic program when QtGui is
+disabled (uic is used to generate some UI code).
+
+This has been fixed upstream in
+http://cmake.org/gitweb?p=cmake.git;a=commit;h=43cb9b8276a70d153d56a69d5c61daaf2bc51b78. This
+commit will be part of the upcoming 2.8.4 CMake release, but in the
+mean time, let's include it in Buildroot.
+
+From 43cb9b8276a70d153d56a69d5c61daaf2bc51b78 Mon Sep 17 00:00:00 2001
+From: Clinton Stimpson <clinton@elemtech.com>
+Date: Fri, 14 Jan 2011 21:26:19 -0700
+Subject: [PATCH] Change to use fphsa to check required variables and version.
+
+Also, set the required variables based on components, if specified.
+Also, don't make finding uic required if not using QtGui.
+---
+ Modules/FindQt4.cmake |  179 +++++++++++++------------------------------------
+ 1 files changed, 46 insertions(+), 133 deletions(-)
+
+diff --git a/Modules/FindQt4.cmake b/Modules/FindQt4.cmake
+index d9d6ea7..70e69b0 100644
+--- a/Modules/FindQt4.cmake
++++ b/Modules/FindQt4.cmake
+@@ -9,7 +9,7 @@
+ # QT_LIBRARIES variable.
+ #
+ # Typical usage could be something like:
+-#   find_package(Qt4 4.4.3 COMPONENTS QtCore QtGui QtXml REQUIRED )
++#   find_package(Qt4 4.4.3 REQUIRED QtCore QtGui QtXml)
+ #   include(${QT_USE_FILE})
+ #   add_executable(myexe main.cpp)
+ #   target_link_libraries(myexe ${QT_LIBRARIES})
+@@ -354,6 +354,7 @@ ENDIF(QT_QT_LIBRARY)
+ 
+ INCLUDE(CheckSymbolExists)
+ INCLUDE(MacroAddFileDependencies)
++INCLUDE(FindPackageHandleStandardArgs)
+ 
+ SET(QT_USE_FILE ${CMAKE_ROOT}/Modules/UseQt4.cmake)
+ 
+@@ -469,6 +470,7 @@ FIND_PROGRAM(QT_QMAKE_EXECUTABLE NAMES qmake qmake4 qmake-qt4 qmake-mac PATHS
+   DOC "The qmake executable for the Qt installation to use"
+ )
+ 
++# double check that it was a Qt4 qmake, if not, re-find with different names
+ IF (QT_QMAKE_EXECUTABLE)
+ 
+   IF(QT_QMAKE_EXECUTABLE_LAST)
+@@ -477,8 +479,6 @@ IF (QT_QMAKE_EXECUTABLE)
+ 
+   SET(QT_QMAKE_EXECUTABLE_LAST "${QT_QMAKE_EXECUTABLE}" CACHE INTERNAL "" FORCE)
+ 
+-  SET(QT4_QMAKE_FOUND FALSE)
+-  
+   _qt4_query_qmake(QT_VERSION QTVERSION)
+ 
+   # check for qt3 qmake and then try and find qmake4 or qmake-qt4 in the path
+@@ -495,74 +495,9 @@ IF (QT_QMAKE_EXECUTABLE)
+     ENDIF(QT_QMAKE_EXECUTABLE)
+   ENDIF(NOT QTVERSION)
+ 
+-  # check that we found the Qt4 qmake, Qt3 qmake output won't match here
+-  STRING(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+" qt_version_tmp "${QTVERSION}")
+-  IF (qt_version_tmp)
+-
+-    # we need at least version 4.0.0
+-    IF (NOT QT_MIN_VERSION)
+-      SET(QT_MIN_VERSION "4.0.0")
+-    ENDIF (NOT QT_MIN_VERSION)
+-
+-    #now parse the parts of the user given version string into variables
+-    STRING(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+" req_qt_major_vers "${QT_MIN_VERSION}")
+-    IF (NOT req_qt_major_vers)
+-      MESSAGE( FATAL_ERROR "Invalid Qt version string given: \"${QT_MIN_VERSION}\", expected e.g. \"4.0.1\"")
+-    ENDIF (NOT req_qt_major_vers)
+-
+-    # now parse the parts of the user given version string into variables
+-    STRING(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+" "\\1" req_qt_major_vers "${QT_MIN_VERSION}")
+-    STRING(REGEX REPLACE "^[0-9]+\\.([0-9])+\\.[0-9]+" "\\1" req_qt_minor_vers "${QT_MIN_VERSION}")
+-    STRING(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+)" "\\1" req_qt_patch_vers "${QT_MIN_VERSION}")
+-
+-    # Suppport finding at least a particular version, for instance FIND_PACKAGE( Qt4 4.4.3 )
+-    # This implementation is a hack to avoid duplicating code and make sure we stay
+-    # source-compatible with CMake 2.6.x
+-    IF( Qt4_FIND_VERSION )
+-      SET( QT_MIN_VERSION ${Qt4_FIND_VERSION} )
+-      SET( req_qt_major_vers ${Qt4_FIND_VERSION_MAJOR} )
+-      SET( req_qt_minor_vers ${Qt4_FIND_VERSION_MINOR} )
+-      SET( req_qt_patch_vers ${Qt4_FIND_VERSION_PATCH} )
+-    ENDIF( Qt4_FIND_VERSION )
+-
+-    IF (NOT req_qt_major_vers EQUAL 4)
+-      MESSAGE( FATAL_ERROR "Invalid Qt version string given: \"${QT_MIN_VERSION}\", major version 4 is required, e.g. \"4.0.1\"")
+-    ENDIF (NOT req_qt_major_vers EQUAL 4)
+-
+-    # and now the version string given by qmake
+-    STRING(REGEX REPLACE "^([0-9]+)\\.[0-9]+\\.[0-9]+.*" "\\1" QT_VERSION_MAJOR "${QTVERSION}")
+-    STRING(REGEX REPLACE "^[0-9]+\\.([0-9])+\\.[0-9]+.*" "\\1" QT_VERSION_MINOR "${QTVERSION}")
+-    STRING(REGEX REPLACE "^[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" QT_VERSION_PATCH "${QTVERSION}")
+-
+-    # compute an overall version number which can be compared at once
+-    MATH(EXPR req_vers "${req_qt_major_vers}*10000 + ${req_qt_minor_vers}*100 + ${req_qt_patch_vers}")
+-    MATH(EXPR found_vers "${QT_VERSION_MAJOR}*10000 + ${QT_VERSION_MINOR}*100 + ${QT_VERSION_PATCH}")
+-
+-    # Support finding *exactly* a particular version, for instance FIND_PACKAGE( Qt4 4.4.3 EXACT )
+-    IF( Qt4_FIND_VERSION_EXACT )
+-      IF(found_vers EQUAL req_vers)
+-        SET( QT4_QMAKE_FOUND TRUE )
+-      ELSE(found_vers EQUAL req_vers)
+-        SET( QT4_QMAKE_FOUND FALSE )
+-        IF (found_vers LESS req_vers)
+-          SET(QT4_INSTALLED_VERSION_TOO_OLD TRUE)
+-        ELSE (found_vers LESS req_vers)
+-          SET(QT4_INSTALLED_VERSION_TOO_NEW TRUE)
+-        ENDIF (found_vers LESS req_vers)
+-      ENDIF(found_vers EQUAL req_vers)
+-    ELSE( Qt4_FIND_VERSION_EXACT )
+-      IF (found_vers LESS req_vers)
+-        SET(QT4_QMAKE_FOUND FALSE)
+-        SET(QT4_INSTALLED_VERSION_TOO_OLD TRUE)
+-      ELSE (found_vers LESS req_vers)
+-        SET(QT4_QMAKE_FOUND TRUE)
+-      ENDIF (found_vers LESS req_vers)
+-    ENDIF( Qt4_FIND_VERSION_EXACT )
+-  ENDIF (qt_version_tmp)
+-
+ ENDIF (QT_QMAKE_EXECUTABLE)
+ 
+-IF (QT4_QMAKE_FOUND)
++IF (QT_QMAKE_EXECUTABLE AND QTVERSION)
+ 
+   # ask qmake for the mkspecs directory
+   # we do this first because QT_LIBINFIX might be set
+@@ -1072,32 +1007,7 @@ IF (QT4_QMAKE_FOUND)
+   # get the directory of the current file, used later on in the file
+   GET_FILENAME_COMPONENT( _qt4_current_dir  "${CMAKE_CURRENT_LIST_FILE}" PATH)
+ 
+-  ######################################
+-  #
+-  #       decide if Qt got found
+-  #
+-  ######################################
+-
+-  # if the includes,libraries,moc,uic and rcc are found then we have it
+-  IF( QT_LIBRARY_DIR AND QT_INCLUDE_DIR AND QT_MOC_EXECUTABLE AND 
+-      QT_UIC_EXECUTABLE AND QT_RCC_EXECUTABLE AND QT_QTCORE_LIBRARY)
+-    SET( QT4_FOUND "YES" )
+-    INCLUDE(FindPackageMessage)
+-    FIND_PACKAGE_MESSAGE(Qt4 "Found Qt-Version ${QTVERSION} (using ${QT_QMAKE_EXECUTABLE})"
+-      "[${QT_LIBRARY_DIR}][${QT_INCLUDE_DIR}][${QT_MOC_EXECUTABLE}][${QT_UIC_EXECUTABLE}][${QT_RCC_EXECUTABLE}]")
+-  ELSE( QT_LIBRARY_DIR AND QT_INCLUDE_DIR AND QT_MOC_EXECUTABLE AND
+-        QT_UIC_EXECUTABLE AND QT_RCC_EXECUTABLE AND QT_QTCORE_LIBRARY)
+-    SET( QT4_FOUND "NO")
+-    SET(QT_QMAKE_EXECUTABLE "${QT_QMAKE_EXECUTABLE}-NOTFOUND" CACHE FILEPATH "Invalid qmake found" FORCE)
+-    IF( Qt4_FIND_REQUIRED)
+-      MESSAGE( FATAL_ERROR "Qt libraries, includes, moc, uic or/and rcc NOT found!")
+-    ENDIF( Qt4_FIND_REQUIRED)
+-  ENDIF( QT_LIBRARY_DIR AND QT_INCLUDE_DIR AND QT_MOC_EXECUTABLE AND 
+-         QT_UIC_EXECUTABLE AND  QT_RCC_EXECUTABLE AND QT_QTCORE_LIBRARY)
+   
+-  SET(QT_FOUND ${QT4_FOUND})
+-
+-
+   ###############################################
+   #
+   #       configuration/system dependent settings  
+@@ -1189,44 +1099,47 @@ IF (QT4_QMAKE_FOUND)
+ 
+   INCLUDE("${_qt4_current_dir}/Qt4Macros.cmake")
+ 
++ENDIF(QT_QMAKE_EXECUTABLE AND QTVERSION)
+ 
+-  #######################################
+-  #
+-  #       compatibility settings 
+-  #
+-  #######################################
+-  # Backwards compatibility for CMake1.4 and 1.2
+-  SET (QT_MOC_EXE ${QT_MOC_EXECUTABLE} )
+-  SET (QT_UIC_EXE ${QT_UIC_EXECUTABLE} )
+-
+-  SET( QT_QT_LIBRARY "")
+-
+-ELSE(QT4_QMAKE_FOUND)
+-   
+-   SET(QT_QMAKE_EXECUTABLE "${QT_QMAKE_EXECUTABLE}-NOTFOUND" CACHE FILEPATH "Invalid qmake found" FORCE)
+-   
+-   # The code below is overly complex to make sure we do not break compatibility with CMake 2.6.x
+-   # For CMake 2.8, it should be simplified by getting rid of QT4_INSTALLED_VERSION_TOO_OLD and 
+-   # QT4_INSTALLED_VERSION_TOO_NEW
+-   IF(Qt4_FIND_REQUIRED)
+-      IF(QT4_INSTALLED_VERSION_TOO_OLD)
+-    IF( Qt4_FIND_VERSION_EXACT )
+-      MESSAGE(FATAL_ERROR "The installed Qt version ${QTVERSION} is too old, version ${QT_MIN_VERSION} is required")
+-    ELSE( Qt4_FIND_VERSION_EXACT )
+-      MESSAGE(FATAL_ERROR "The installed Qt version ${QTVERSION} is too old, at least version ${QT_MIN_VERSION} is required")
+-    ENDIF( Qt4_FIND_VERSION_EXACT )
+-      ELSE(QT4_INSTALLED_VERSION_TOO_OLD)
+-      IF( Qt4_FIND_VERSION_EXACT AND QT4_INSTALLED_VERSION_TOO_NEW )
+-      MESSAGE(FATAL_ERROR "The installed Qt version ${QTVERSION} is too new, version ${QT_MIN_VERSION} is required")
+-    ELSE( Qt4_FIND_VERSION_EXACT AND QT4_INSTALLED_VERSION_TOO_NEW )
+-      MESSAGE( FATAL_ERROR "Qt qmake not found!")
+-    ENDIF( Qt4_FIND_VERSION_EXACT AND QT4_INSTALLED_VERSION_TOO_NEW )
+-      ENDIF(QT4_INSTALLED_VERSION_TOO_OLD)
+-   ELSE(Qt4_FIND_REQUIRED)
+-      IF(QT4_INSTALLED_VERSION_TOO_OLD AND NOT Qt4_FIND_QUIETLY)
+-         MESSAGE(STATUS "The installed Qt version ${QTVERSION} is too old, at least version ${QT_MIN_VERSION} is required")
+-      ENDIF(QT4_INSTALLED_VERSION_TOO_OLD AND NOT Qt4_FIND_QUIETLY)
+-   ENDIF(Qt4_FIND_REQUIRED)
+- 
+-ENDIF (QT4_QMAKE_FOUND)
++#support old QT_MIN_VERSION if set, but not if version is supplied by find_package()
++IF(NOT Qt4_FIND_VERSION AND QT_MIN_VERSION)
++  SET(Qt4_FIND_VERSION ${QT_MIN_VERSION})
++ENDIF(NOT Qt4_FIND_VERSION AND QT_MIN_VERSION)
++
++IF( Qt4_FIND_COMPONENTS )
++
++  # if components specified in find_package(), make sure each of those pieces were found
++  SET(_QT4_FOUND_REQUIRED_VARS QT_QMAKE_EXECUTABLE QT_MOC_EXECUTABLE QT_RCC_EXECUTABLE QT_INCLUDE_DIR QT_LIBRARY_DIR)
++  FOREACH( component ${Qt4_FIND_COMPONENTS} )
++    STRING( TOUPPER ${component} _COMPONENT )
++    SET(_QT4_FOUND_REQUIRED_VARS ${_QT4_FOUND_REQUIRED_VARS} QT_${_COMPONENT}_INCLUDE_DIR QT_${_COMPONENT}_LIBRARY)
++  ENDFOREACH( component )
++
++  if(Qt4_FIND_COMPONENTS MATCHES QtGui)
++    SET(_QT4_FOUND_REQUIRED_VARS ${_QT4_FOUND_REQUIRED_VARS} QT_UIC_EXECUTABLE)
++  endif(Qt4_FIND_COMPONENTS MATCHES QtGui)
++
++ELSE( Qt4_FIND_COMPONENTS )
++
++  # if no components specified, we'll make a default set of required variables to say Qt is found
++  SET(_QT4_FOUND_REQUIRED_VARS QT_QMAKE_EXECUTABLE QT_MOC_EXECUTABLE QT_RCC_EXECUTABLE QT_UIC_EXECUTABLE QT_INCLUDE_DIR
++    QT_LIBRARY_DIR QT_QTCORE_LIBRARY)
++
++ENDIF( Qt4_FIND_COMPONENTS )
++
++FIND_PACKAGE_HANDLE_STANDARD_ARGS(Qt4
++  REQUIRED_VARS ${_QT4_FOUND_REQUIRED_VARS}
++  VERSION_VAR QTVERSION
++  )
++
++#######################################
++#
++#       compatibility settings
++#
++#######################################
++# Backwards compatibility for CMake1.4 and 1.2
++SET (QT_MOC_EXE ${QT_MOC_EXECUTABLE} )
++SET (QT_UIC_EXE ${QT_UIC_EXECUTABLE} )
++SET( QT_QT_LIBRARY "")
++SET(QT_FOUND ${QT4_FOUND})
+ 
+-- 
+1.7.0