Index: External/SPEC/CFP2017rate/526.blender_r/CMakeLists.txt
===================================================================
--- External/SPEC/CFP2017rate/526.blender_r/CMakeLists.txt
+++ External/SPEC/CFP2017rate/526.blender_r/CMakeLists.txt
@@ -15,6 +15,10 @@
   -DHAVE_UNSIGNED_CHAR
 )
 add_compile_options(-funsigned-char)
+
+# config/Example-clang-llvm-linux-x86.cfg suggests that this is needed.
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D__BOOL_DEFINED")
+
 speccpu2017_add_include_dirs(
   specrand
   blender/extern/binreloc/include