ENH: fix depend bug in qt

Modules/FindQt4.cmake

@@ -866,13 +866,18 @@ IF (QT4_QMAKE_FOUND)
       GET_FILENAME_COMPONENT(infile ${it} ABSOLUTE)
       GET_FILENAME_COMPONENT(rc_path ${infile} PATH)
       SET(outfile ${CMAKE_CURRENT_BINARY_DIR}/qrc_${outfilename}.cxx)
-      #  parse file for dependencies
+      #  parse file for dependencies 
+      #  all files are absolute paths or relative to the location of the qrc file
       FILE(READ "${infile}" _RC_FILE_CONTENTS)
       STRING(REGEX MATCHALL "<file[^<]+" _RC_FILES "${_RC_FILE_CONTENTS}")
       SET(_RC_DEPENDS)
       FOREACH(_RC_FILE ${_RC_FILES})
         STRING(REGEX REPLACE "^<file[^>]*>" "" _RC_FILE "${_RC_FILE}")
-        SET(_RC_DEPENDS ${_RC_DEPENDS} "${rc_path}/${_RC_FILE}")
+        STRING(REGEX MATCH "^/|([A-Za-z]:/)" _ABS_PATH_INDICATOR "${_RC_FILE}")
+        IF(NOT _ABS_PATH_INDICATOR)
+          SET(_RC_FILE "${rc_path}/${_RC_FILE}")
+        ENDIF(NOT _ABS_PATH_INDICATOR)
+        SET(_RC_DEPENDS ${_RC_DEPENDS} "${_RC_FILE}")
       ENDFOREACH(_RC_FILE)
       ADD_CUSTOM_COMMAND(OUTPUT ${outfile}
         COMMAND ${QT_RCC_EXECUTABLE}