Use common CMake tests.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

CMakeLists.txt

@@ -20,6 +20,7 @@ set( VERSION R14.1.0 )
 
 include( FindPkgConfig          )
 include( CheckFunctionExists    )
+include( CheckSymbolExists      )
 include( CheckIncludeFile       )
 include( CheckLibraryExists     )
 include( CheckCSourceCompiles   )

ConfigureChecks.cmake

@@ -16,14 +16,11 @@ tde_setup_architecture_flags( )
 include(TestBigEndian)
 test_big_endian(WORDS_BIGENDIAN)
 
+tde_setup_largefiles( )
 
-##### check for gcc visibility support
+
+##### check for gcc visibility support #########
 
 if( WITH_GCC_VISIBILITY )
-  if( NOT UNIX )
-    tde_message_fatal( "gcc visibility support was requested, but your system is not *NIX" )
-  endif( NOT UNIX )
-  set( __KDE_HAVE_GCC_VISIBILITY 1 )
-  set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
-  set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")
-endif( WITH_GCC_VISIBILITY )
+  tde_setup_gcc_visibility( )
+endif( )