Update tde_setup_gcc_visibility macro

+ In the test include kdemacros.h with detected full path to avoid FTBFS.
+ Do not test gcc visibility on TDE unless the current module uses TDE.
+ Do not test gcc visibility on TQt unless the current module uses TQt.
+ Improve test for gcc visibility on TQt to make it more accurate.

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

modules/TDEMacros.cmake

@@ -1869,37 +1869,41 @@ macro( tde_setup_gcc_visibility )
       tde_message_fatal( "gcc visibility support was requested, but your system is not *NIX" )
     endif( NOT UNIX )
 
-    find_library( TQT_LIBFILE tqt-mt HINTS "${TQT_LIBRARY_DIRS}" )
+    if( TQT_FOUND )
-    if( NOT "${TQT_LIBFILE}" STREQUAL "TQT_LIBFILE-NOTFOUND" )
+      find_library( TQT_LIBFILE tqt-mt HINTS "${TQT_LIBRARY_DIRS}" )
-      message( STATUS "Performing Test HAVE_TQT_VISIBILITY" )
+      if( NOT "${TQT_LIBFILE}" STREQUAL "TQT_LIBFILE-NOTFOUND" )
-      execute_process(
+        message( STATUS "Performing Test HAVE_TQT_VISIBILITY" )
-        COMMAND readelf --syms "${TQT_LIBFILE}"
+        execute_process(
-        OUTPUT_VARIABLE HAVE_TQT_VISIBILITY
+          COMMAND readelf --syms "${TQT_LIBFILE}"
-      )
+          OUTPUT_VARIABLE HAVE_TQT_VISIBILITY
-      if( "${HAVE_TQT_VISIBILITY}" STREQUAL "" OR
+        )
-          "${HAVE_TQT_VISIBILITY}" MATCHES "DEFAULT[^\n]*QSettingsPrivate" )
+        if( "${HAVE_TQT_VISIBILITY}" STREQUAL "" OR
-        message( STATUS "Performing Test HAVE_TQT_VISIBILITY - Failed" )
+            "${HAVE_TQT_VISIBILITY}" MATCHES "GLOBAL[\t ]+DEFAULT[^\n]+QSettingsPrivate" )
-        tde_message_fatal( "gcc visibility support was requested, but not supported in tqt library" )
+          message( STATUS "Performing Test HAVE_TQT_VISIBILITY - Failed" )
+          tde_message_fatal( "gcc visibility support was requested, but not supported in tqt library" )
+        endif( )
+        message( STATUS "Performing Test HAVE_TQT_VISIBILITY - Success" )
       endif( )
-      message( STATUS "Performing Test HAVE_TQT_VISIBILITY - Success" )
+    endif( TQT_FOUND )
-    endif( )
+
-
+    if( TDE_FOUND )
-    find_file( TDEMACROS_H kdemacros.h HINTS "${TDE_INCLUDE_DIR}" )
+      find_file( TDEMACROS_H kdemacros.h HINTS "${TDE_INCLUDE_DIR}" )
-    if( NOT "${TDEMACROS_H}" STREQUAL "TDEMACROS_H-NOTFOUND" )
+      if( NOT "${TDEMACROS_H}" STREQUAL "TDEMACROS_H-NOTFOUND" )
-      tde_save_and_set( CMAKE_REQUIRED_INCLUDES "${TDE_INCLUDE_DIR}" )
+        tde_save_and_set( CMAKE_REQUIRED_INCLUDES "${TDE_INCLUDE_DIR}" )
-      check_cxx_source_compiles( "
+        check_cxx_source_compiles( "
-        #include <kdemacros.h>
+          #include <${TDEMACROS_H}>
-          #ifndef __KDE_HAVE_GCC_VISIBILITY
+            #ifndef __KDE_HAVE_GCC_VISIBILITY
-          #error gcc visibility is not enabled in tdelibs
+            #error gcc visibility is not enabled in tdelibs
-          #endif
+            #endif
-          int main() { return 0; } "
+            int main() { return 0; } "
-        HAVE_TDE_VISIBILITY
+          HAVE_TDE_VISIBILITY
-      )
+        )
-      tde_restore( CMAKE_REQUIRED_INCLUDES )
+        tde_restore( CMAKE_REQUIRED_INCLUDES )
-      if( NOT HAVE_TDE_VISIBILITY )
+        if( NOT HAVE_TDE_VISIBILITY )
-        tde_message_fatal( "gcc visibility support was requested, but not supported in tdelibs" )
+          tde_message_fatal( "gcc visibility support was requested, but not supported in tdelibs" )
-      endif( NOT HAVE_TDE_VISIBILITY )
+        endif( NOT HAVE_TDE_VISIBILITY )
-    endif( )
+      endif( )
+    endif( TDE_FOUND )
 
     set( __KDE_HAVE_GCC_VISIBILITY 1 )
     set( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fvisibility=hidden -fvisibility-inlines-hidden")