python - Procedure entry point __gxx_personality_v0 could not be located libstdc++-6.dll -

appreciate question has been asked , answered several cases i'm still having issues. directory structure laid out such:

models/     bs/         __init__.py         values.py     optlib/         makefile         bin/             optlib.so       # generated after compilation/linking             libstdc++-6.dll         inc/             optlib.h             stats.h         obj/             optlib.o        # generated after compilation/linking             stats.o         # generated after compilation/linking         src/             optlib.cc             stats.cc 

in short, source files in src, header files in inc, object files output obj , shared library file output bin.

i've compiled , linked c/c++ libraries using following commands (extracted makefile):

g++ -c -iinc -o obj/optlib.o src/optlib.cc g++ -c -iinc -o obj/stats.o src/stats.cc  g++ -shared -wl,-soname,bin/optlib.so -o bin/optlib.so obj/optlib.o obj/stats.o 

i'm using mingw on windows 7 machine , attempting access shared library python using ctypes. i've placed libstdc++-6.dll file c:\mingw\bin bin directory contains shared library, optlib.so many of posts suggest.

my python code follows (note __init__.py imports values.py):

# neither os.path.abspath method of building path works... fn = os.path.abspath(os.path.join(os.path.dirname(__file__), '..', 'optlib', 'bin', 'optlib.so')) print type(fn) # returns <type 'unicode'> # or implicitly typing out #fn= u'c:\\users\\striji\\desktop\\models\\optlib\\bin\\optlib.so' load_with_altered_search_path=0x00000008 kernel32 = windll('kernel32') kernel32.loadlibraryexw.restype = c_void_p hmod = kernel32.loadlibraryexw(fn, none, load_with_altered_search_path) lib = cdll(fn, handle=hmod)  def fcn(x):     lib.c_func.argtypes = [c_double]     lib.c_func.restype = c_double     x = byref(c_double(x))     return lib.c_func(x) 

when attempt import module using following:

>>> models import bs 

i following error:

c:\mingw\bin on path variable. source code c++ wrapped in extern "c" ctypes can see it. these simple c++ functions. if need see source, can post.

question twofold. first, how fix immediate problem. second, possible simplify compilation , linking process system agnostic (i.e. compiles , links on mac osx , linux)?