--- llvmmath/build.py.orig	2014-11-07 01:29:53.000000000 +0300
+++ llvmmath/build.py	2014-11-07 01:31:14.000000000 +0300
@@ -52,7 +52,7 @@
 Config = namedtuple('Config', 'clang conv_templ targets log output_dir')
 
 _default_values = {
-    'clang':        'clang',
+    'clang':        '@clang@',
     'conv_templ':   join(root, 'generator', 'conv_template.py'),
     'targets':      [build_llvm], #, build_shared],
     'log':          logger.info,
@@ -105,10 +105,10 @@
     return exists(asmfile)
 
 @cached
-def have_clang():
+def have_clang(clang='clang'):
     "See whether we have clang installed and working"
     try:
-        return call(['clang', '--help'], stdout=PIPE) == 0
+        return call([clang, '--help'], stdout=PIPE) == 0
     except EnvironmentError:
         return False