Set default values before conditionals

[azharudd]

Summary

Patch by Azharuddin Mohammed

[mgrang]

LGTM.

lnt/trunk/lnt/testing/util/compilers.py

def get_cc_info(path, cc_flags=[]):
     cc_target = cc_dumpmachine = capture([cc, '-dumpmachine']).strip()
 
     # Default the target to the response from dumpmachine.
     cc_target = cc_dumpmachine
 
     # Parse out the compiler's version line and the path to the "cc1" binary.
     cc1_binary = None
     version_ln = None
+    cc_name = cc_version_num = cc_build_string = cc_extra = ""
     for ln in cc_version.split('\n'):
         if ' version ' in ln:
             version_ln = ln
         elif 'cc1' in ln or 'clang-cc' in ln:
             m = re.match(r' "?([^"]*)"?.*"?-E"?.*', ln)
             if not m:
                 fatal("unable to determine cc1 binary: %r: %r" % (cc, ln))
             cc1_binary, = m.groups()
else:
         m = re.match(r'(.*) version ([^ ]*) +(\([^(]*\))(.*)', version_ln)
         if m is not None:
             cc_name,cc_version_num,cc_build_string,cc_extra = m.groups()
         else:
             # If that didn't match, try a more basic pattern.
             m = re.match(r'(.*) version ([^ ]*)', version_ln)
             if m is not None:
                 cc_name,cc_version_num = m.groups()
-                cc_build_string = cc_extra = ""
             else:
                 error("unable to determine compiler version: %r: %r" % (
                         cc, version_ln))
                 cc_name = "unknown"
-                cc_version_num = cc_build_string = cc_extra = ""
 
     # Compute normalized compiler name and type. We try to grab source
     # revisions, branches, and tags when possible.
     cc_norm_name = None
     cc_build = None
     cc_src_branch = cc_alt_src_branch = None
     cc_src_revision = cc_alt_src_revision = None
     cc_src_tag = None