add a KDECompilerSettings.cmake, which contains the extracted compiler settings from FindKDE4Internal.cmake

This is not done yet.
It currently depends on cmake git master.
All the places where I'm not sure I added a "TODO".

Alex

2 files changed, 487 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ff9bc317..d6b514a3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.6 FATAL_ERROR)
+cmake_minimum_required(VERSION 2.8.7 FATAL_ERROR)
 
 project(extra-cmake-modules)
 
diff --git a/kde-modules/KDECompilerSettings.cmake b/kde-modules/KDECompilerSettings.cmake
new file mode 100644
index 00000000..018e60d3
--- /dev/null
+++ b/kde-modules/KDECompilerSettings.cmake
@@ -0,0 +1,486 @@
+#  A note on the possible values for CMAKE_BUILD_TYPE and how KDE handles
+#  the flags for those buildtypes. FindKDE4Internal supports the values
+#  Debug, Release, RelWithDebInfo, Profile and Debugfull:
+#
+#  Release
+#          optimised for speed, qDebug/kDebug turned off, no debug symbols, no asserts
+#  RelWithDebInfo (Release with debug info)
+#          similar to Release, optimised for speed, but with debugging symbols on (-g)
+#  Debug
+#          optimised but debuggable, debugging on (-g)
+#          (-fno-reorder-blocks -fno-schedule-insns -fno-inline)
+#  DebugFull
+#          no optimisation, full debugging on (-g3)
+#  Profile
+#          DebugFull + -ftest-coverage -fprofile-arcs
+#
+#
+#  The default buildtype is RelWithDebInfo.
+#  It is expected that the "Debug" build type be still debuggable with gdb
+#  without going all over the place, but still produce better performance.
+#  It's also important to note that gcc cannot detect all warning conditions
+#  unless the optimiser is active.
+
+
+include(CheckCXXCompilerFlag)
+
+# Position-Independent-Executable is a feature of Binutils, Libc, and GCC that creates an executable
+# which is something between a shared library and a normal executable.
+# Programs compiled with these features appear as ?shared object? with the file command.
+# info from "http://www.linuxfromscratch.org/~manuel/hlfs-book/glibc-2.4/chapter02/pie.html"
+option(KDE4_ENABLE_FPIE  "Enable platform supports PIE linking")
+
+# TODO: what's up with this manifest stuff ?
+#       setting the CMAKE_MODULE_PATH like this is definitely wrong.
+#       FindKDEWin.cmake should probably come from ecm
+#
+# if (WIN32)
+#    list(APPEND CMAKE_MODULE_PATH "${CMAKE_INSTALL_PREFIX}/share/apps/cmake/modules")
+#    find_package(KDEWin REQUIRED)
+#    option(KDE4_ENABLE_UAC_MANIFEST "add manifest to make vista uac happy" OFF)
+#    if (KDE4_ENABLE_UAC_MANIFEST)
+#       find_program(KDE4_MT_EXECUTABLE mt
+#          PATHS ${KDEWIN_INCLUDE_DIR}/../bin
+#          NO_DEFAULT_PATH
+#       )
+#       if (KDE4_MT_EXECUTABLE)
+#          message(STATUS "Found KDE manifest tool at ${KDE4_MT_EXECUTABLE} ")
+#       else (KDE4_MT_EXECUTABLE)
+#          message(STATUS "KDE manifest tool not found, manifest generating for Windows Vista disabled")
+#          set (KDE4_ENABLE_UAC_MANIFEST OFF)
+#       endif (KDE4_MT_EXECUTABLE)
+#    endif (KDE4_ENABLE_UAC_MANIFEST)
+# endif (WIN32)
+
+
+######################################################
+#  and now the platform specific stuff
+######################################################
+
+# Set a default build type for single-configuration
+# CMake generators if no build type is set.
+if (NOT CMAKE_CONFIGURATION_TYPES AND NOT CMAKE_BUILD_TYPE)
+   set(CMAKE_BUILD_TYPE RelWithDebInfo)
+endif()
+
+
+if (WIN32)
+
+   # limit win32 packaging to kdelibs at now
+   # don't know if package name, version and notes are always available
+
+# TODO: with KDE frameworks, there is no bootstrapping of FindKDE4Internal.cmake, so can the following
+#       lines simply be removed ?
+
+#    if(_kdeBootStrapping)
+#       find_package(KDEWIN_Packager)
+#       if (KDEWIN_PACKAGER_FOUND)
+#          kdewin_packager("kdelibs" "${KDE_VERSION}" "KDE base library" "")
+#       endif (KDEWIN_PACKAGER_FOUND)
+#
+#       include(Win32Macros)
+#       addExplorerWrapper("kdelibs")
+#    endif(_kdeBootStrapping)
+
+# TODO: I don't think we should set any include dirs in this file
+#   set( _KDE4_PLATFORM_INCLUDE_DIRS ${KDEWIN_INCLUDES})
+
+   # if we are compiling kdelibs, add KDEWIN_LIBRARIES explicitely,
+   # otherwise they come from KDELibsDependencies.cmake, Alex
+
+# TODO: bootstrapping, see above
+#    if (_kdeBootStrapping)
+#       set( KDE4_KDECORE_LIBS ${KDE4_KDECORE_LIBS} ${KDEWIN_LIBRARIES} )
+#    endif (_kdeBootStrapping)
+
+
+   # windows, microsoft compiler
+   if(MSVC)
+      set( _KDE4_PLATFORM_DEFINITIONS -DKDE_FULL_TEMPLATE_EXPORT_INSTANTIATION -DWIN32_LEAN_AND_MEAN )
+
+      # C4250: 'class1' : inherits 'class2::member' via dominance
+      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -wd4250" )
+      # C4251: 'identifier' : class 'type' needs to have dll-interface to be used by clients of class 'type2'
+      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -wd4251" )
+      # C4396: 'identifier' : 'function' the inline specifier cannot be used when a friend declaration refers to a specialization of a function template
+      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -wd4396" )
+      # to avoid a lot of deprecated warnings
+      set(_KDE4_PLATFORM_DEFINITIONS ${_KDE4_PLATFORM_DEFINITIONS}
+                       -D_CRT_SECURE_NO_DEPRECATE
+                       -D_CRT_SECURE_NO_WARNINGS
+                       -D_CRT_NONSTDC_NO_DEPRECATE
+                       -D_SCL_SECURE_NO_WARNINGS
+                       )
+      # 'identifier' : no suitable definition provided for explicit template instantiation request
+      set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -wd4661" )
+   endif()
+
+# TODO: we should not depend on Perl or Qt already been found here
+#
+#    # for visual studio IDE set the path correctly for custom commands
+#    # maybe under windows bat-files should be generated for running apps during the build
+#    if(MSVC_IDE)
+#      get_filename_component(PERL_LOCATION "${PERL_EXECUTABLE}" PATH)
+#      file(TO_NATIVE_PATH "${PERL_LOCATION}" PERL_PATH_WINDOWS)
+#      file(TO_NATIVE_PATH "${QT_BINARY_DIR}" QT_BIN_DIR_WINDOWS)
+#      set(CMAKE_MSVCIDE_RUN_PATH "${PERL_PATH_WINDOWS}\;${QT_BIN_DIR_WINDOWS}"
+#        CACHE STATIC "MSVC IDE Run path" FORCE)
+#    endif()
+
+endif (WIN32)
+
+
+################# RPATH handling ##################################
+
+# setup default RPATH/install_name handling, may be overridden by KDE4_HANDLE_RPATH_FOR_EXECUTABLE
+# It sets up to build with full RPATH. When installing, RPATH will be changed to the LIB_INSTALL_DIR
+# and all link directories which are not inside the current build dir.
+if (UNIX)
+   # the rest is RPATH handling
+   # here the defaults are set
+   # which are partly overwritten in kde4_handle_rpath_for_library()
+   # and kde4_handle_rpath_for_executable(), both located in KDE4Macros.cmake, Alex
+   if (APPLE)
+      set(CMAKE_INSTALL_NAME_DIR ${LIB_INSTALL_DIR})
+   else ()
+      # add our LIB_INSTALL_DIR to the RPATH (but only when it is not one of the standard system link
+      # directories listed in CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES) and use the RPATH figured out by cmake when compiling
+
+      list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${LIB_INSTALL_DIR}" _isSystemLibDir)
+      if("${_isSystemLibDir}" STREQUAL "-1")
+         set(CMAKE_INSTALL_RPATH "${LIB_INSTALL_DIR}")
+      endif("${_isSystemLibDir}" STREQUAL "-1")
+
+      set(CMAKE_SKIP_BUILD_RPATH FALSE)
+      set(CMAKE_BUILD_WITH_INSTALL_RPATH FALSE)
+      set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
+   endif ()
+endif (UNIX)
+
+###################################################################
+
+
+
+# TODO: this should not be here, make sure nothing breaks without it
+# if (Q_WS_X11)
+#    # Done by FindQt4.cmake already
+#    #find_package(X11 REQUIRED)
+#    # UNIX has already set _KDE4_PLATFORM_INCLUDE_DIRS, so append
+#    set(_KDE4_PLATFORM_INCLUDE_DIRS ${_KDE4_PLATFORM_INCLUDE_DIRS} ${X11_INCLUDE_DIR} )
+# endif ()
+
+if(CYGWIN)
+   message(FATAL_ERROR "Cygwin is NOT supported, use mingw or MSVC.")
+endif(CYGWIN)
+
+
+if(WIN32)
+# TODO: do we really want to have this line here ? Is it actually needed ?
+   # we prefer to use a different postfix for debug libs only on Windows
+   # does not work atm
+   set(CMAKE_DEBUG_POSTFIX "")
+
+   # we don't support anything below w2k and all winapi calls are unicodes
+   set( _KDE4_PLATFORM_DEFINITIONS -D_WIN32_WINNT=0x0501 -DWINVER=0x0501 -D_WIN32_IE=0x0501 -DUNICODE )
+endif()
+
+
+# This will need to be modified later to support either Qt/X11 or Qt/Mac builds
+if (APPLE)
+  set ( _KDE4_PLATFORM_DEFINITIONS -D__APPLE_KDE__ )
+
+  # we need to set MACOSX_DEPLOYMENT_TARGET to (I believe) at least 10.2 or maybe 10.3 to allow
+  # -undefined dynamic_lookup; in the future we should do this programmatically
+  # hmm... why doesn't this work?
+  set (ENV{MACOSX_DEPLOYMENT_TARGET} 10.3)
+endif()
+
+
+if ("${CMAKE_SYSTEM_NAME}" MATCHES Linux OR "${CMAKE_SYSTEM_NAME}" STREQUAL GNU)
+   set ( _KDE4_PLATFORM_DEFINITIONS -D_XOPEN_SOURCE=500 -D_BSD_SOURCE -D_GNU_SOURCE)
+endif()
+
+
+if ("${CMAKE_SYSTEM_NAME}" MATCHES BSD)
+   set ( _KDE4_PLATFORM_DEFINITIONS -D_GNU_SOURCE )
+endif()
+
+
+if (UNIX)
+   set ( _KDE4_PLATFORM_DEFINITIONS ${_KDE4_PLATFORM_DEFINITIONS} -D_LARGEFILE64_SOURCE)
+
+# TODO: is this test really necessary, or is it good enough to simply add -D_FILE_OFFSET_BITS=64 , as done below ?
+#    check_cxx_source_compiles("
+# #include <sys/types.h>
+#  /* Check that off_t can represent 2**63 - 1 correctly.
+#     We can't simply define LARGE_OFF_T to be 9223372036854775807,
+#     since some C++ compilers masquerading as C compilers
+#     incorrectly reject 9223372036854775807.  */
+# #define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#
+#   int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721 && LARGE_OFF_T % 2147483647 == 1) ? 1 : -1];
+#   int main() { return 0; }
+# " _OFFT_IS_64BIT)
+#
+#    if (NOT _OFFT_IS_64BIT)
+#      set ( _KDE4_PLATFORM_DEFINITIONS "${_KDE4_PLATFORM_DEFINITIONS} -D_FILE_OFFSET_BITS=64")
+#    endif (NOT _OFFT_IS_64BIT)
+   set ( _KDE4_PLATFORM_DEFINITIONS ${_KDE4_PLATFORM_DEFINITIONS} -D_FILE_OFFSET_BITS=64)
+endif (UNIX)
+
+
+if (APPLE)
+  # "-undefined dynamic_lookup" means we don't care about missing symbols at link-time by default
+  # this is bad, but unavoidable until there is the equivalent of libtool -no-undefined implemented
+  # or perhaps it already is, and I just don't know where to look  ;)
+
+  set (CMAKE_SHARED_LINKER_FLAGS "-single_module -multiply_defined suppress ${CMAKE_SHARED_LINKER_FLAGS}")
+  set (CMAKE_MODULE_LINKER_FLAGS "-multiply_defined suppress ${CMAKE_MODULE_LINKER_FLAGS}")
+  #set(CMAKE_SHARED_LINKER_FLAGS "-single_module -undefined dynamic_lookup -multiply_defined suppress")
+  #set(CMAKE_MODULE_LINKER_FLAGS "-undefined dynamic_lookup -multiply_defined suppress")
+
+  # we profile...
+  if(CMAKE_BUILD_TYPE_TOLOWER MATCHES profile)
+    set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
+    set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
+  endif()
+
+  # removed -Os, was there a special reason for using -Os instead of -O2 ?, Alex
+  # optimization flags are set below for the various build types
+  set (CMAKE_C_FLAGS     "${CMAKE_C_FLAGS} -fno-common")
+  set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-common")
+endif (APPLE)
+
+
+# TODO: why don't we go inside that block on the BSDs ?
+if (CMAKE_SYSTEM_NAME MATCHES Linux OR CMAKE_SYSTEM_NAME STREQUAL GNU)
+   if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+      set ( CMAKE_SHARED_LINKER_FLAGS "-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_SHARED_LINKER_FLAGS}")
+      set ( CMAKE_MODULE_LINKER_FLAGS "-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_MODULE_LINKER_FLAGS}")
+
+      set ( CMAKE_SHARED_LINKER_FLAGS "-Wl,--enable-new-dtags ${CMAKE_SHARED_LINKER_FLAGS}")
+      set ( CMAKE_MODULE_LINKER_FLAGS "-Wl,--enable-new-dtags ${CMAKE_MODULE_LINKER_FLAGS}")
+      set ( CMAKE_EXE_LINKER_FLAGS "-Wl,--enable-new-dtags ${CMAKE_EXE_LINKER_FLAGS}")
+
+      # we profile...
+      if(CMAKE_BUILD_TYPE_TOLOWER MATCHES profile)
+        set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
+        set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -fprofile-arcs -ftest-coverage")
+      endif(CMAKE_BUILD_TYPE_TOLOWER MATCHES profile)
+   endif()
+
+   if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
+      set ( CMAKE_SHARED_LINKER_FLAGS "-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_SHARED_LINKER_FLAGS}")
+      set ( CMAKE_MODULE_LINKER_FLAGS "-Wl,--fatal-warnings -Wl,--no-undefined -lc ${CMAKE_MODULE_LINKER_FLAGS}")
+   endif ()
+endif (CMAKE_SYSTEM_NAME MATCHES Linux OR CMAKE_SYSTEM_NAME STREQUAL GNU)
+
+
+
+if (CMAKE_SYSTEM_NAME MATCHES BSD)
+   set ( CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -lc")
+   set ( CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -lc")
+endif (CMAKE_SYSTEM_NAME MATCHES BSD)
+
+
+############################################################
+# compiler specific settings
+############################################################
+
+
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+
+   # this macro is for internal use only.
+   macro(_KDE_INSERT_FLAG FLAG VAR DOC)
+      if(NOT ${VAR} MATCHES "${FLAG}")
+         set(${VAR} "${${VAR}} ${FLAG}" CACHE STRING "Flags used by the linker during ${DOC} builds." FORCE)
+      endif(NOT ${VAR} MATCHES "${FLAG}")
+   endmacro()
+
+   set (KDE4_ENABLE_EXCEPTIONS -EHsc)
+
+   # Qt disables the native wchar_t type, do it too to avoid linking issues
+   set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Zc:wchar_t-" )
+
+   # make sure that no header adds libcmt by default using #pragma comment(lib, "libcmt.lib") as done by mfc/afx.h
+   _kde_insert_flag("/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "Release with Debug Info")
+   _kde_insert_flag("/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt" CMAKE_EXE_LINKER_FLAGS_RELEASE "release")
+   _kde_insert_flag("/NODEFAULTLIB:libcmt /DEFAULTLIB:msvcrt" CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "release minsize")
+   _kde_insert_flag("/NODEFAULTLIB:libcmtd /DEFAULTLIB:msvcrtd" CMAKE_EXE_LINKER_FLAGS_DEBUG "debug")
+endif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
+
+# TODO: this is for BSD, this looks like something which should be done in CMake
+# # This macro is for internal use only
+# # Return the directories present in gcc's include path.
+# macro(_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang _result)
+#   set(${_result})
+#   set(_gccOutput)
+#   file(WRITE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy" "\n" )
+#   execute_process(COMMAND ${CMAKE_C_COMPILER} -v -E -x ${_lang} -dD dummy
+#                   WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/CMakeFiles
+#                   ERROR_VARIABLE _gccOutput
+#                   OUTPUT_VARIABLE _gccStdout )
+#   file(REMOVE "${CMAKE_BINARY_DIR}/CMakeFiles/dummy")
+#
+#   if( "${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+) *\n *End of (search) list" )
+#     SET(${_result} ${CMAKE_MATCH_1})
+#     STRING(REPLACE "\n" " " ${_result} "${${_result}}")
+#     SEPARATE_ARGUMENTS(${_result})
+#   ENDIF( "${_gccOutput}" MATCHES "> search starts here[^\n]+\n *(.+) *\n *End of (search) list" )
+# endmacro(_DETERMINE_GCC_SYSTEM_INCLUDE_DIRS _lang)
+
+
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+
+# if (CMAKE_COMPILER_IS_GNUCC)
+#    _DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c _dirs)
+#    set(CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES
+#        ${CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES} ${_dirs})
+# endif (CMAKE_COMPILER_IS_GNUCC)
+
+
+#    _DETERMINE_GCC_SYSTEM_INCLUDE_DIRS(c++ _dirs)
+#    set(CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES
+#        ${CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES} ${_dirs})
+
+   set (KDE4_ENABLE_EXCEPTIONS "-fexceptions -UQT_NO_EXCEPTIONS")
+   # Select flags.
+   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_CXX_FLAGS_DEBUG          "-g -O2 -fno-reorder-blocks -fno-schedule-insns -fno-inline")
+   set(CMAKE_CXX_FLAGS_DEBUGFULL      "-g3 -fno-inline")
+   set(CMAKE_CXX_FLAGS_PROFILE        "-g3 -fno-inline -ftest-coverage -fprofile-arcs")
+   set(CMAKE_C_FLAGS_RELWITHDEBINFO   "-O2 -g -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_C_FLAGS_RELEASE          "-O2 -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_C_FLAGS_DEBUG            "-g -O2 -fno-reorder-blocks -fno-schedule-insns -fno-inline")
+   set(CMAKE_C_FLAGS_DEBUGFULL        "-g3 -fno-inline")
+   set(CMAKE_C_FLAGS_PROFILE          "-g3 -fno-inline -ftest-coverage -fprofile-arcs")
+
+   if (CMAKE_SYSTEM_NAME MATCHES Linux OR CMAKE_SYSTEM_NAME STREQUAL GNU)
+     set ( CMAKE_C_FLAGS     "${CMAKE_C_FLAGS} -Wno-long-long -std=iso9899:1990 -Wundef -Wcast-align -Werror-implicit-function-declaration -Wchar-subscripts -Wall -W -Wpointer-arith -Wwrite-strings -Wformat-security -Wmissing-format-attribute -fno-common")
+     # As off Qt 4.6.x we need to override the new exception macros if we want compile with -fno-exceptions
+     set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wnon-virtual-dtor -Wno-long-long -ansi -Wundef -Wcast-align -Wchar-subscripts -Wall -W -Wpointer-arith -Wformat-security -fno-exceptions -DQT_NO_EXCEPTIONS -fno-check-new -fno-common")
+# TODO: the following line was added by Dirk in 2007 to make snprintf() available. But this should not be necessary, since
+#       _BSD_SOURCE is already added to _KDE4_PLATFORM_DEFINITIONS (http://quickgit.kde.org/index.php?p=kdelibs.git&a=commitdiff&h=4a44862b2d178c1d2e1eb4da90010d19a1e4a42c&hp=6531561cb4ed978ff86b8d840dcafc9705af5527)
+#     add_definitions (-D_BSD_SOURCE)
+   endif ()
+
+   if (CMAKE_SYSTEM_NAME STREQUAL GNU)
+      set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -pthread")
+      set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -pthread")
+   endif ()
+
+   # gcc under Windows
+   if (MINGW)
+      set (CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,--export-all-symbols -Wl,--disable-auto-import")
+      set (CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} -Wl,--export-all-symbols -Wl,--disable-auto-import")
+   endif ()
+
+   check_cxx_compiler_flag(-fPIE __KDE_HAVE_FPIE_SUPPORT)
+   if(KDE4_ENABLE_FPIE)
+      if(__KDE_HAVE_FPIE_SUPPORT)
+         set (KDE4_CXX_FPIE_FLAGS "-fPIE")
+         set (KDE4_PIE_LDFLAGS "-pie")
+      else()
+         message(STATUS "Your compiler doesn't support the PIE flag")
+      endif()
+   endif()
+
+   check_cxx_compiler_flag(-Woverloaded-virtual __KDE_HAVE_W_OVERLOADED_VIRTUAL)
+   if(__KDE_HAVE_W_OVERLOADED_VIRTUAL)
+      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Woverloaded-virtual")
+   endif(__KDE_HAVE_W_OVERLOADED_VIRTUAL)
+
+   # visibility support
+   check_cxx_compiler_flag(-fvisibility=hidden __KDE_HAVE_GCC_VISIBILITY)
+   set( __KDE_HAVE_GCC_VISIBILITY ${__KDE_HAVE_GCC_VISIBILITY} CACHE BOOL "GCC support for hidden visibility")
+
+   # CMAKE_CXX_COMPILER_VERSION exists since cmake 2.8.7.20120217
+   if(NOT CMAKE_CXX_COMPILER_VERSION)
+      message(FATAL_ERROR "Your CMake is too old. You need current git master.")
+   endif()
+
+   if(NOT "${CMAKE_CXX_COMPILER_VERSION}"  VERSION_LESS  "4.1.0")
+      set(GCC_IS_NEWER_THAN_4_1 TRUE)
+   endif()
+
+   if(NOT "${CMAKE_CXX_COMPILER_VERSION}"  VERSION_LESS  "4.2.0")
+      set(GCC_IS_NEWER_THAN_4_2 TRUE)
+   endif()
+
+   if(NOT "${CMAKE_CXX_COMPILER_VERSION}"  VERSION_LESS  "4.3.0")
+      set(GCC_IS_NEWER_THAN_4_3 TRUE)
+   endif()
+
+   # save a little by making local statics not threadsafe
+   # ### do not enable it for older compilers, see
+   # ### http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31806
+   if (GCC_IS_NEWER_THAN_4_3)
+       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-threadsafe-statics")
+   endif()
+
+   set(_GCC_COMPILED_WITH_BAD_ALLOCATOR FALSE)
+   if (GCC_IS_NEWER_THAN_4_1)
+      exec_program(${CMAKE_C_COMPILER} ARGS ${CMAKE_C_COMPILER_ARG1} -v OUTPUT_VARIABLE _gcc_alloc_info)
+      string(REGEX MATCH "(--enable-libstdcxx-allocator=mt)" _GCC_COMPILED_WITH_BAD_ALLOCATOR "${_gcc_alloc_info}")
+   endif ()
+
+   if (__KDE_HAVE_GCC_VISIBILITY AND GCC_IS_NEWER_THAN_4_1 AND NOT _GCC_COMPILED_WITH_BAD_ALLOCATOR AND NOT WIN32)
+
+
+       set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
+
+# TODO: this variable is not documented and not used anywhere
+#       added by Thiago here http://quickgit.kde.org/index.php?p=kdelibs.git&a=commitdiff&h=6bb4ef06259281d643d410cc4e84cd40bf4cd43f
+#       and moved by Thiago into this extra variable here: http://quickgit.kde.org/index.php?p=kdelibs.git&a=commitdiff&h=a47300bd88435735bca6518926bc6c0e4c6cd708
+#       set (KDE4_C_FLAGS "-fvisibility=hidden")
+
+# TODO: get the following information from QtConfig.cmake
+#       # check that Qt defines Q_DECL_EXPORT as __attribute__ ((visibility("default")))
+#       # if it doesn't and KDE compiles with hidden default visibiltiy plugins will break
+#       set(_source "#include <QtCore/QtGlobal>\n int main()\n {\n #ifndef QT_VISIBILITY_AVAILABLE \n #error QT_VISIBILITY_AVAILABLE is not available\n #endif \n }\n")
+#       set(_source_file ${CMAKE_BINARY_DIR}/CMakeTmp/check_qt_visibility.cpp)
+#       file(WRITE "${_source_file}" "${_source}")
+#       set(_include_dirs "-DINCLUDE_DIRECTORIES:STRING=${QT_INCLUDES}")
+#
+#       try_compile(_compile_result ${CMAKE_BINARY_DIR} ${_source_file} CMAKE_FLAGS "${_include_dirs}" COMPILE_OUTPUT_VARIABLE _compile_output_var)
+#
+#       if(NOT _compile_result)
+#          message(FATAL_ERROR "Qt compiled without support for -fvisibility=hidden. This will break plugins and linking of some applications. Please fix your Qt installation (try passing --reduce-exports to configure).")
+#       endif(NOT _compile_result)
+
+      if (GCC_IS_NEWER_THAN_4_2)
+         set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror=return-type -fvisibility-inlines-hidden")
+      endif (GCC_IS_NEWER_THAN_4_2)
+   else()
+      set (__KDE_HAVE_GCC_VISIBILITY 0)
+   endif()
+
+endif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+
+
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
+
+   set (KDE4_ENABLE_EXCEPTIONS -fexceptions)
+   # Select flags.
+   set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g")
+   set(CMAKE_CXX_FLAGS_RELEASE        "-O2 -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_CXX_FLAGS_DEBUG          "-O2 -g -fno-inline -noalign")
+   set(CMAKE_CXX_FLAGS_DEBUGFULL      "-g -fno-inline -noalign")
+   set(CMAKE_C_FLAGS_RELWITHDEBINFO   "-O2 -g")
+   set(CMAKE_C_FLAGS_RELEASE          "-O2 -DNDEBUG -DQT_NO_DEBUG")
+   set(CMAKE_C_FLAGS_DEBUG            "-O2 -g -fno-inline -noalign")
+   set(CMAKE_C_FLAGS_DEBUGFULL        "-g -fno-inline -noalign")
+
+   set(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -ansi -Wall -w1 -Wpointer-arith -fno-common")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ansi -Wall -w1 -Wpointer-arith -fno-exceptions -fno-common")
+
+   # visibility support
+   set(__KDE_HAVE_ICC_VISIBILITY)
+#   check_cxx_compiler_flag(-fvisibility=hidden __KDE_HAVE_ICC_VISIBILITY)
+#   if (__KDE_HAVE_ICC_VISIBILITY)
+#      set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden")
+#   endif (__KDE_HAVE_ICC_VISIBILITY)
+
+endif("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")