diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/CMakeLists.txt OpenSceneGraph-OpenSceneGraph-3.6.5-new/CMakeLists.txt

--- OpenSceneGraph-OpenSceneGraph-3.6.5/CMakeLists.txt	2021-11-13 21:34:02.520773203 +0100

+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/CMakeLists.txt	2021-11-13 21:34:03.101774222 +0100

@@ -742,7 +742,19 @@ ELSE()

     FIND_PACKAGE(ilmbase)

     FIND_PACKAGE(Inventor)

     FIND_PACKAGE(Jasper)

-    FIND_PACKAGE(OpenEXR)

+    FIND_PACKAGE(Imath CONFIG)

+    IF(TARGET Imath::Imath)

+    FIND_PACKAGE(OpenEXR REQUIRED CONFIG)

+        SET(OPENEXR_LIBRARIES OpenEXR::OpenEXR Imath::Imath)

+        SET(OPENEXR_LIBRARIES_VARS "${OPENEXR_LIBRARIES}")

+            GET_TARGET_PROPERTY(OPENEXR_INCLUDE_DIR OpenEXR::OpenEXRConfig INTERFACE_INCLUDE_DIRECTORIES)

+            GET_TARGET_PROPERTY(IMATH_INCLUDE_DIR Imath::ImathConfig INTERFACE_INCLUDE_DIRECTORIES)

+            LIST(APPEND OPENEXR_INCLUDE_DIR ${IMATH_INCLUDE_DIR})

+            MESSAGE(STATUS "OpenEXR/Imath libraries: " ${OPENEXR_LIBRARIES})

+            SET(OPENEXR_FOUND TRUE)

+    ELSE()

+        FIND_PACKAGE(OpenEXR)

+    ENDIF()

     FIND_PACKAGE(OpenCascade)

     FIND_PACKAGE(COLLADA)

     FIND_PACKAGE(FBX)

diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/CMakeModules/FindOpenEXR.cmake OpenSceneGraph-OpenSceneGraph-3.6.5-new/CMakeModules/FindOpenEXR.cmake

--- OpenSceneGraph-OpenSceneGraph-3.6.5/CMakeModules/FindOpenEXR.cmake	2020-01-31 12:03:07.000000000 +0100

+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/CMakeModules/FindOpenEXR.cmake	2021-11-13 21:34:03.101774222 +0100

@@ -23,6 +23,7 @@ FIND_PATH(OPENEXR_INCLUDE_DIR OpenEXR/Im

     /opt/include

     /usr/freeware/include

 )

+SET(OPENEXR_INCLUDE_DIR ${OPENEXR_INCLUDED_DIR}/OpenEXR)

 # Macro to find exr libraries (deduplicating search paths)

 # example: OPENEXR_FIND_VAR(OPENEXR_IlmImf_LIBRARY IlmImf)

diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/src/osgPlugins/exr/CMakeLists.txt OpenSceneGraph-OpenSceneGraph-3.6.5-new/src/osgPlugins/exr/CMakeLists.txt

--- OpenSceneGraph-OpenSceneGraph-3.6.5/src/osgPlugins/exr/CMakeLists.txt	2020-01-31 12:03:07.000000000 +0100

+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/src/osgPlugins/exr/CMakeLists.txt	2021-11-13 21:34:03.102774224 +0100

@@ -12,3 +12,8 @@ ENDIF()

 #### end var setup  ###

 SETUP_PLUGIN(exr)

+

+# Force linking with OpenEXR/Imath until upstream fixes their config.

+if(TARGET Imath::Imath)

+    target_link_libraries(osgdb_exr OpenEXR::OpenEXR Imath::Imath)

+endif()

diff -rupN --no-dereference OpenSceneGraph-OpenSceneGraph-3.6.5/src/osgPlugins/exr/ReaderWriterEXR.cpp OpenSceneGraph-OpenSceneGraph-3.6.5-new/src/osgPlugins/exr/ReaderWriterEXR.cpp

--- OpenSceneGraph-OpenSceneGraph-3.6.5/src/osgPlugins/exr/ReaderWriterEXR.cpp	2020-01-31 12:03:07.000000000 +0100

+++ OpenSceneGraph-OpenSceneGraph-3.6.5-new/src/osgPlugins/exr/ReaderWriterEXR.cpp	2021-11-13 21:34:03.102774224 +0100

@@ -41,11 +41,11 @@ public:

       {

         return _inStream->read(c,n).good();

       };

-      virtual Int64    tellg ()

+      virtual uint64_t    tellg ()

       {

           return _inStream->tellg();

       };

-      virtual void    seekg (Int64 pos)

+      virtual void    seekg (uint64_t pos)

       {

         _inStream->seekg(pos);

       };

@@ -69,11 +69,11 @@ public:

       {

         _outStream->write(c,n);

       };

-      virtual Int64    tellp ()

+      virtual uint64_t    tellp ()

       {

         return _outStream->tellp();

       };

-      virtual void seekp (Int64 pos)

+      virtual void seekp (uint64_t pos)

       {

         _outStream->seekp(pos);

       };