Fix FTBFS due to late includes in CMake

(cherry picked from commit e39b3d2d65)

CMakeLists.txt

@@ -12,6 +12,15 @@
 cmake_minimum_required( VERSION 2.8 )
 
 
+##### include essential cmake modules ###########
+
+include( CheckCXXSourceCompiles )
+include( CheckFunctionExists )
+include( CheckIncludeFile )
+include( CheckLibraryExists )
+include( FindPkgConfig )
+
+
 ##### include our cmake modules #################
 set( CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules" )
 include( TDEMacros )
@@ -55,8 +64,6 @@ tde_setup_architecture_flags( )
 
 ##### check for include files ###################
 
-include( CheckIncludeFile )
-
 check_include_file( "sys/time.h" HAVE_SYS_TIME_H )
 check_include_file( "time.h" TIME_WITH_SYS_TIME )
 check_include_file( "stdio.h" HAVE_STDIO_H )
@@ -73,8 +80,6 @@ check_include_file( "pthread.h" HAVE_LIBPTHREAD )
 
 ##### check for system libraries ################
 
-include( CheckLibraryExists )
-
 set( DL_LIBRARIES dl )
 check_library_exists( ${DL_LIBRARIES} dlopen /lib HAVE_LIBDL )
 if( NOT HAVE_LIBDL )
@@ -87,9 +92,8 @@ endif( NOT HAVE_LIBDL )
 
 find_package( Threads )
 
-##### check for functions #######################
 
-include( CheckFunctionExists )
+##### check for functions #######################
 
 set( bak_CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} )
 set( CMAKE_REQUIRED_LIBRARIES ${DL_LIBRARIES} )
@@ -105,11 +109,6 @@ set( CMAKE_REQUIRED_LIBRARIES ${bak_CMAKE_REQUIRED_LIBRARIES} )
 unset( bak_CMAKE_REQUIRED_LIBRARIES )
 
 
-##### check for modules #########################
-
-include( FindPkgConfig )
-
-
 ##### check for audiofile #######################
 
 set( HAVE_LIBAUDIOFILE 0 )
@@ -232,8 +231,6 @@ endif( )
 
 ##### check for TQt #############################
 
-include( CheckCXXSourceCompiles )
-
 find_package( TQt )