Get Macros from your compiler

compilerMacros.py

#!/usr/bin/env python

# imports you need or a kitty will die
# if you don't use them :(
import os
import shlex
import subprocess
import sys

# remplace with the compiler you want to see
# compiler macros.
# ex. 'G++', 'g++'
#     'CC', 'cc'
# Want to check cross compilers (android toolchains)?
# be sure you set the compiler in PATH var CC
c = os.environ.get('CC')

def init():
  try:
    # I know this could be more simple with grep
    # but i want to do it on python. I am a bad guy
    # and bad guys uses python for all simple things.
    print '''C compiler found!'''
    compiler = subprocess.Popen(shlex.split(c) + ['-dM', '-E', '-'], stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    print compiler
  except OSError:
    # Sorry, good luck next time.
    print '''No acceptable C compiler found!\n'''
    sys.exit()

  compiler.stdin.write('\n')
  print '''\nCompiler macros list\n'''
  c_out = compiler.communicate()[0]
  # I save it on a file because so compilers have
  # really long macros list and check them on a
  # terminal screen is not the best thing in the
  # world.
  print '''Macros saved on compiler-macros file'''
  print c_out

  c_out = str(c_out).split('\n')
  # Print compiler macros as Array. Don0t know if you
  # will use this but I want to print something. So,
  # you got it.
  print c_out

# just run it man!
init()