- 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

@@ -4,38 +4,47 @@
 #  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)
 
-find_path(DJVULIBRE_INCLUDE_DIR libdjvu/ddjvuapi.h
+  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
-)
+  )
 
-find_library(DJVULIBRE_LIBRARY NAMES djvulibre
+  find_library(DJVULIBRE_LIBRARY NAMES djvulibre
     PATHS
+    ${_ddjvuLinkDir}
     /usr/lib
     /usr/local/lib
     ${GNUWIN32_DIR}/lib
-)
+  )
 
-if(DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
+  if(DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
     set(DJVULIBRE_FOUND TRUE)
-endif(DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
+  endif(DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)
 
-if (DJVULIBRE_FOUND)
+  if (DJVULIBRE_FOUND)
     if (NOT DJVULIBRE_FIND_QUIETLY)
       message(STATUS "Found DjVuLibre: ${DJVULIBRE_LIBRARY}")
     endif (NOT DJVULIBRE_FIND_QUIETLY)
-else (DJVULIBRE_FOUND)
+  else (DJVULIBRE_FOUND)
     if (DJVULIBRE_FIND_REQUIRED)
       message(FATAL_ERROR "Could NOT find DjVuLibre")
     endif (DJVULIBRE_FIND_REQUIRED)
-endif (DJVULIBRE_FOUND)
+  endif (DJVULIBRE_FOUND)
+
+  mark_as_advanced(DJVULIBRE_INCLUDE_DIR DJVULIBRE_LIBRARY)
 
-mark_as_advanced(DJVULIBRE_INCLUDE_DIR DJVULIBRE_LIBRARY)
+endif (DJVULIBRE_INCLUDE_DIR AND DJVULIBRE_LIBRARY)