- convert it to use pkgconfig (so implicitely the minimum version required is 3.5.17, as first version that ships a .pc file)

- be quiet if djvu was already found

svn path=/branches/work/kde4/playground/graphics/cmake/; revision=550295

cmake/modules/modules/FindDjVuLibre.cmake

@@ -4,14 +4,20 @@
 #  DJVULIBRE_FOUND - system has the DjVuLibre library
 #  DJVULIBRE_INCLUDE_DIR - the DjVuLibre include directory
 #  DJVULIBRE_LIBRARY - Link this to use the DjVuLibre library
-#
-include(CheckLibraryExists)
 
-# reset vars
+if (DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
-set(DJVULIBRE_INCLUDE_DIR)
+
-set(DJVULIBRE_LIBRARY)
+  # in cache already
+  set(DJVULIBRE_FOUND TRUE)
+
+else (DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
+
+  include(UsePkgConfig)
+
+  pkgconfig(ddjvuapi _ddjvuIncDir _ddjvuLinkDir ddjvuLinkFlags _ddjvuCflags)
 
   find_path(DJVULIBRE_INCLUDE_DIR libdjvu/ddjvuapi.h
+    ${_ddjvuIncDir}
     /usr/local/include
     /usr/include
     ${GNUWIN32_DIR}/include
@@ -19,6 +25,7 @@ find_path(DJVULIBRE_INCLUDE_DIR libdjvu/ddjvuapi.h
 
   find_library(DJVULIBRE_LIBRARY NAMES djvulibre
     PATHS
+    ${_ddjvuLinkDir}
     /usr/lib
     /usr/local/lib
     ${GNUWIN32_DIR}/lib
@@ -39,3 +46,5 @@ else (DJVULIBRE_FOUND)
   endif (DJVULIBRE_FOUND)
 
   mark_as_advanced(DJVULIBRE_INCLUDE_DIR DJVULIBRE_LIBRARY)
+
+endif (DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)