cmake: made OpenEXR a direct dependency since we use it for

the caching system

CMakeLists.txt

@@ -43,6 +43,8 @@ find_package(OpenColorIO REQUIRED)
 
 find_package(OpenImageIO REQUIRED)
 
+find_package(OpenEXR REQUIRED)
+
 find_package(Qt5 5.6 REQUIRED
   COMPONENTS
   Core

app/CMakeLists.txt

@@ -106,6 +106,7 @@ target_include_directories(
   ${FFMPEG_INCLUDE_DIRS}
   ${OCIO_INCLUDE_DIRS}
   ${OIIO_INCLUDE_DIRS}
+  ${OPENEXR_INCLUDE_DIRS}
 )
 
 target_link_libraries(
@@ -126,6 +127,7 @@ target_link_libraries(
   FFMPEG::swresample
   ${OCIO_LIBRARIES}
   ${OIIO_LIBRARIES}
+  ${OPENEXR_LIBRARIES}
 )
 
 if (WIN32)