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import os
import subprocess
import re
import sys
def which(cmd):
for p in os.environ["PATH"].split(os.pathsep):
clang_path = os.path.join(p, cmd)
if os.path.exists(clang_path):
return clang_path
return None
CLANG_VERSION_REGEX = ".*version\s*([0-9]*\.[0-9]*)\.*"
clang_path = which("clang++")
clang_version_major = 0
clang_version_minor = 0
if clang_path:
clang_version_out = subprocess.Popen([clang_path, "--version"], stdout=subprocess.PIPE).communicate()[0]
clang_version_match = re.search(CLANG_VERSION_REGEX, clang_version_out)
clang_version_str = clang_version_match.group(1)
clang_version_array = clang_version_str.split('.')
clang_version_major = int(clang_version_array[0])
clang_version_minor = int(clang_version_array[1])
if clang_version_major >= 3 and clang_version_minor >= 5:
print ""
else:
# Loop in support clang version only
clang_version_major = 3
clang_version_minor = 9
while clang_version_major >= 3 and clang_version_minor >= 5:
clang_version_str = "%d.%d" % (clang_version_major, clang_version_minor)
clang_path = which("clang++-" + clang_version_str)
if clang_path:
print clang_version_str
sys.exit(0)
clang_version_minor -= 1
if clang_version_minor < 0:
clang_version_minor = 9
clang_version_major -= 1
print "None"
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