+# Disable gcc's potentially uninitialized use analysis as it presents lots of
+# false positives.
+if (CMAKE_COMPILER_IS_GNUCXX)
+ check_cxx_compiler_flag("-Wmaybe-uninitialized" HAS_MAYBE_UNINITIALIZED)
+ if (HAS_MAYBE_UNINITIALIZED)
+ set(USE_NO_MAYBE_UNINITIALIZED 1)
+ else()
+ # Only recent versions of gcc make the distinction between -Wuninitialized
+ # and -Wmaybe-uninitialized. If -Wmaybe-uninitialized isn't supported, just
+ # turn off all uninitialized use warnings.
+ check_cxx_compiler_flag("-Wuninitialized" HAS_UNINITIALIZED)
+ set(USE_NO_UNINITIALIZED ${HAS_UNINITIALIZED})
+ endif()
+endif()
+
+include(GetHostTriple)
+get_host_triple(LLVM_HOST_TRIPLE)
+
+# By default, we target the host, but this can be overridden at CMake
+# invocation time.
+set(LLVM_HOSTTRIPLE "${LLVM_HOST_TRIPLE}")