gcc error: command '/usr/bin/gcc' failed with exit status 1 - c++

Question

Several months ago I ran a build file and working without any problem. after that, when I update Ubuntu 14 and run that again, got some unexpected errors:
running build_ext
building 'allthethings' extension
/usr/bin/gcc -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -arch
i386 -arch x86_64 -fPIC
-I/home/xin/anaconda2/lib/python2.7/site-packages/numpy/core/include
-I/home/xin -I/usr/include
-I/home/xin/anaconda2/include/python2.7 -c allthethings.cpp -o
build/temp.linux-x86_64-2.7/allthethings.o -fopenmp
gcc: error: i386: No such file or directory
gcc: error: x86_64: No such file or directory
gcc: error: unrecognized command line option ‘-arch’
gcc: error: unrecognized command line option ‘-arch’
error: command '/usr/bin/gcc' failed with exit status 1
I am not sure what is wrong, since the input source flag of file, is real simple:
export ARCHFLAGS=""
export CFLAGS="-arch i386 -arch x86_64"
The main part of the build_ext is shown bellow:
os.environ["CC"] = "/usr/bin/gcc"
os.environ["CXX"] = "/usr/bin/g++"
from distutils.core import setup, Extension
from Cython.Build import cythonize
from Cython.Distutils import build_ext
import numpy
print 'start'
setup(ext_modules=cythonize(Extension(
"allthethings", # the extesion name
sources=["allthethings.pyx", "channel.cpp", "setupandrun.cpp",
"file_output.cc", "network.cpp", "levmar.cpp", "mp_mat.cpp",
"str_double.cpp", "mp_mat_double.cpp", "libcla.c","setup.py"],
libraries=["lapack", "cblas", "fftw3", "m"],
language="c++",
extra_link_args=['-fopenmp'],
extra_compile_args=['-fopenmp'],
include_dirs=[numpy.get_include(),"/home/xin", "/usr/include"]
)))
Thanks for anyone help. I'm not sure, but maybe the error is due to recent updates of ubuntu14. It is very difficult for me to solve that, since I do not know what the error message means.
gcc -v shows:
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.9/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 4.9.3- 8ubuntu2~14.04'
--with-bugurl=file:///usr/share/doc/gcc-4.9/README.Bugs --enable-languages=c,c++,java,go,d,fortran,objc,obj-c++
--prefix=/usr --program-suffix=-4.9 --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--with-gxx-include-dir=/usr/include/c++/4.9 --libdir=/usr/lib --enable-nls
--with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--enable-gnu-unique-object --disable-vtable-verify --enable-plugin --with-system-zlib
--disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/jre
--enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64
--with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-4.9-amd64 --with-arch-directory=amd64
--with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.9.3 (Ubuntu 4.9.3-8ubuntu2~14.04)