Cycles: disable RTTI only for OSL files, other libraries like OpenVDB need it

This is a bit weak since it's not entirely clear where the boundary is, but
tested to build and pass tests on all platforms.

intern/cycles/CMakeLists.txt

@@ -177,14 +177,11 @@ if(CXX_HAS_AVX2)
   add_definitions(-DWITH_KERNEL_AVX2)
 endif()
 
-if(WITH_CYCLES_OSL)
-  # LLVM and OSL need to build without RTTI
-  if(WIN32 AND MSVC)
-    set(RTTI_DISABLE_FLAGS "/GR- -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
-  elseif(CMAKE_COMPILER_IS_GNUCC OR (CMAKE_C_COMPILER_ID MATCHES "Clang"))
-    set(RTTI_DISABLE_FLAGS "-fno-rtti -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
-  endif()
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${RTTI_DISABLE_FLAGS}")
+# LLVM and OSL need to build without RTTI
+if(WIN32 AND MSVC)
+  set(RTTI_DISABLE_FLAGS "/GR- -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
+elseif(CMAKE_COMPILER_IS_GNUCC OR (CMAKE_C_COMPILER_ID MATCHES "Clang"))
+  set(RTTI_DISABLE_FLAGS "-fno-rtti -DBOOST_NO_RTTI -DBOOST_NO_TYPEID")
 endif()
 
 # Definitions and Includes

intern/cycles/kernel/osl/CMakeLists.txt

@@ -33,6 +33,9 @@ set(LIB
   ${LLVM_LIBRARY}
 )
 
+# OSL and LLVM are built without RTTI
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${RTTI_DISABLE_FLAGS}")
+
 include_directories(${INC})
 include_directories(SYSTEM ${INC_SYS})
 

intern/cycles/render/CMakeLists.txt

@@ -92,6 +92,8 @@ if(WITH_CYCLES_OSL)
   list(APPEND LIB
     cycles_kernel_osl
   )
+
+  SET_PROPERTY(SOURCE osl.cpp PROPERTY COMPILE_FLAGS ${RTTI_DISABLE_FLAGS})
 endif()
 
 include_directories(${INC})