Minor change for smooth build against upcoming Imath 3.0

src/cmake/cuda_macros.cmake

@@ -20,7 +20,7 @@ function ( NVCC_COMPILE cuda_src ptx_generated extra_nvcc_args )
             "-I${PROJECT_SOURCE_DIR}/src/include"
             "-I${PROJECT_SOURCE_DIR}/src/cuda_common"
             "-I${OpenImageIO_INCLUDES}"
-            "-I${ILMBASE_INCLUDES}"
+            "-I${IMATH_INCLUDES}"
             "-I${Boost_INCLUDE_DIRS}"
             "-DFMT_DEPRECATED=\"\""
             ${LLVM_COMPILE_FLAGS}

src/cmake/externalpackages.cmake

@@ -89,6 +89,12 @@ checked_find_package (OpenEXR REQUIRED
                         "OpenEXR 2.2 is the oldest version our CI tests against, and the minimum that supports DWA compression"
                       PRINT IMATH_INCLUDES
                      )
+# Force Imath includes to be before everything else to ensure that we have
+# the right Imath/OpenEXR version, not some older version in the system
+# library. This shoudn't be necessary, except for the common case of people
+# building against Imath/OpenEXR 3.x when there is still a system-level
+# install version of 2.x.
+include_directories(BEFORE ${IMATH_INCLUDES})
 if (CMAKE_COMPILER_IS_CLANG AND OPENEXR_VERSION VERSION_LESS 2.3)
     # clang C++ >= 11 doesn't like 'register' keyword in old exr headers
     add_compile_options (-Wno-deprecated-register)

src/liboslexec/CMakeLists.txt

@@ -189,7 +189,7 @@ add_library (${local_lib} ${lib_src})
 target_include_directories (${local_lib}
     PUBLIC
         ${CMAKE_INSTALL_FULL_INCLUDEDIR}
-        ${ILMBASE_INCLUDES}
+        ${IMATH_INCLUDES}
     PRIVATE
         "${CMAKE_SOURCE_DIR}/src/liboslcomp"
     )

src/liboslquery/CMakeLists.txt

@@ -12,14 +12,14 @@ add_library (${local_lib} ${lib_src})
 target_include_directories (${local_lib}
     PUBLIC
         ${CMAKE_INSTALL_FULL_INCLUDEDIR}
-        ${ILMBASE_INCLUDES}
     PRIVATE
+        # ${IMATH_INCLUDES}
         ../liboslexec)
 target_link_libraries (${local_lib}
     PUBLIC
         OpenImageIO::OpenImageIO
-        ${ILMBASE_LIBRARIES}
     PRIVATE
+        # ${IMATH_LIBRARIES}
         ${Boost_LIBRARIES}
     )
 

testsuite/example-cuda/CMakeLists.txt

@@ -43,7 +43,7 @@ cuda_compile_ptx(CUDA_PTX_FILES cuda_grid_renderer.cu
     OPTIONS --gpu-architecture=${CUDA_TARGET_ARCH} --use_fast_math -dc --std=c++11
             --expt-relaxed-constexpr
             -I${OSL_INCLUDES}
-            -I${ILMBASE_INCLUDES}
+            -I${IMATH_INCLUDES}
             -I${OpenImageIO_INCLUDES}
             -I${OPTIX_INCLUDES}
 )
@@ -61,7 +61,7 @@ cuda_compile_ptx(CUDA_PTX_FILES rend_lib.cu
     OPTIONS --gpu-architecture=${CUDA_TARGET_ARCH} --use_fast_math -dc --std=c++14
             --expt-relaxed-constexpr
             -I${OSL_INCLUDES}
-            -I${ILMBASE_INCLUDES}
+            -I${IMATH_INCLUDES}
             -I${OpenImageIO_INCLUDES}
             -I${OPTIX_INCLUDES}
 )