Guard against nonexisting linker.

environment.py

@@ -352,7 +352,10 @@ class Environment():
 
     def detect_static_linker(self):
         exelist = self.get_static_linker_exelist()
+        try:
             p = subprocess.Popen(exelist + ['--version'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        except OSError:
+            raise EnvironmentException('Could not execute static linker "%s".' % ' '.join(exelist))
         (out, err) = p.communicate()
         out = out.decode()
         err = err.decode()