1 files changed, 2 insertions, 0 deletions
diff --git a/emcc b/emcc
index 73921f91..6f0f9cbf 100755
--- a/emcc
+++ b/emcc
@@ -86,6 +86,7 @@ LEAVE_INPUTS_RAW = os.environ.get('EMCC_LEAVE_INPUTS_RAW') # Do not compile .ll
                                                            # added in. Also, LLVM optimizations will not be done, nor dead code elimination
 
 if DEBUG: print >> sys.stderr, 'emcc: ', ' '.join(sys.argv)
+if DEBUG and LEAVE_INPUTS_RAW: print >> sys.stderr, 'emcc: leaving inputs raw'
 
 shared.check_sanity()
 
@@ -477,6 +478,7 @@ try:
       shared.Building.build_library('libcxx', shared.EMSCRIPTEN_TEMP_DIR, shared.EMSCRIPTEN_TEMP_DIR, ['libcxx.bc'], configure=None, copy_project=True, source_dir=shared.path_from_root('system', 'lib', 'libcxx'))
       return os.path.join(shared.EMSCRIPTEN_TEMP_DIR, 'libcxx', 'libcxx.bc')
     def fix_libcxx():
+      assert shared.Settings.QUANTUM_SIZE == 4, 'We do not support libc++ with QUANTUM_SIZE == 1'
       # libcxx might need corrections, so turn them all on. TODO: check which are actually needed
       shared.Settings.CORRECT_SIGNS = shared.Settings.CORRECT_OVERFLOWS = shared.Settings.CORRECT_ROUNDINGS = 1
       print >> sys.stderr, 'emcc: warning: using libcxx turns on CORRECT_* options'