# use export_executable_symbols(target).
set(CMAKE_SHARED_LIBRARY_LINK_CXX_FLAGS "")
+set(LLVM_PROFDATA_FILE "" CACHE FILEPATH
+ "Profiling data file to use when compiling in order to improve runtime performance.")
+
+if(LLVM_PROFDATA_FILE AND EXISTS ${LLVM_PROFDATA_FILE})
+ if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" )
+ add_definitions("-fprofile-instr-use=${LLVM_PROFDATA_FILE}")
+ else()
+ message(FATAL_ERROR "LLVM_PROFDATA_FILE can only be specified when compiling with clang")
+ endif()
+endif()
+
include(AddLLVM)
include(TableGen)