Reapply commit 936d3cec inadvertently reverted in de7e5867

CMakeLists.txt

@@ -22,6 +22,7 @@ set( VERSION "R14" )
 
 include( FindPkgConfig )
 include( CheckIncludeFile )
+include( CheckIncludeFiles )
 include( CheckCSourceRuns )
 include( CheckCXXSourceRuns )
 include( CheckCXXSourceCompiles )
@@ -84,6 +85,7 @@ option( WITH_HAL "Enable HAL support" ${WITH_ALL_OPTIONS} )
 option( WITH_TDEHWLIB "Enable TDE hardware library support" OFF )
 option( WITH_UPOWER "Enable UPOWER support" ${WITH_ALL_OPTIONS} )
 option( WITH_GCC_VISIBILITY "Enable fvisibility and fvisibility-inlines-hidden" ${WITH_ALL_OPTIONS} )
+option( WITH_KDESKTOP_LOCK_BACKTRACE "Enable backtrace in kdesktop_lock exception handler"  ${WITH_ALL_OPTIONS} )
 
 ##### options comments ##########################
 

config.h.cmake

@@ -121,6 +121,7 @@
 
 // kdesktop
 #cmakedefine KSCREENSAVER_PAM_SERVICE "@KSCREENSAVER_PAM_SERVICE@"
+#cmakedefine WITH_KDESKTOP_LOCK_BACKTRACE 1
 
 // tdm
 #cmakedefine XBINDIR "@XBINDIR@"

kdesktop/ConfigureChecks.cmake

@@ -14,3 +14,10 @@
 if( WITH_PAM AND (NOT DEFINED KSCREENSAVER_PAM_SERVICE) )
   set( KSCREENSAVER_PAM_SERVICE "kde" CACHE INTERNAL "" )
 endif( )
+
+if( WITH_KDESKTOP_LOCK_BACKTRACE )
+  check_include_files( "bfd.h;demangle.h;libiberty.h" HAVE_BINUTILS_DEV )
+  if( NOT HAVE_BINUTILS_DEV )
+    tde_message_fatal( "binutils-dev are required, but not found on your system" )
+  endif( )
+endif( )

kdesktop/lock/CMakeLists.txt

@@ -32,11 +32,16 @@ set( target kdesktop_lock )
 
 set( ${target}_SRCS
   lockprocess.cc lockdlg.cc infodlg.cc querydlg.cc sakdlg.cc
-  securedlg.cc autologout.cc main.cc backtrace_symbols.c
+  securedlg.cc autologout.cc main.cc
 )
 
+if( WITH_KDESKTOP_LOCK_BACKTRACE )
+  list( APPEND ${target}_SRCS backtrace_symbols.c )
+  set( BACKTRACE_LIBRARY bfd )
+endif( )
+
 tde_add_executable( ${target} AUTOMOC
   SOURCES ${${target}_SRCS}
-  LINK kdesktopsettings-static dmctl-static tdeio-shared Xext bfd ${GL_LIBRARY} "${LINKER_IMMEDIATE_BINDING_FLAGS}"
+  LINK kdesktopsettings-static dmctl-static tdeio-shared Xext ${BACKTRACE_LIBRARY} ${GL_LIBRARY} "${LINKER_IMMEDIATE_BINDING_FLAGS}"
   DESTINATION ${BIN_INSTALL_DIR}
 )

kdesktop/lock/lockprocess.cc

@@ -137,6 +137,7 @@ static Atom   gXA_SCREENSAVER_VERSION;
 
 void print_trace()
 {
+#ifdef WITH_KDESKTOP_LOCK_BACKTRACE
 	void *array[10];
 	size_t size;
 	char **strings;
@@ -152,6 +153,7 @@ void print_trace()
 	}
 
 	free (strings);
+#endif
 }
 
 static void segv_handler(int)