|  | diff --git a/numpy/distutils/mingw32ccompiler.py b/numpy/distutils/mingw32ccompiler.py | 
|  | index 3358695..553f5b3 100644 | 
|  | --- a/numpy/distutils/mingw32ccompiler.py | 
|  | +++ b/numpy/distutils/mingw32ccompiler.py | 
|  | @@ -123,10 +123,12 @@ class Mingw32CCompiler(distutils.cygwinccompiler.CygwinCCompiler): | 
|  | else: | 
|  | # gcc-4 series releases do not support -mno-cygwin option | 
|  | self.set_executables( | 
|  | -                    compiler='gcc -g -DDEBUG -DMS_WIN64 -O0 -Wall', | 
|  | -                    compiler_so='gcc -g -DDEBUG -DMS_WIN64 -O0 -Wall -Wstrict-prototypes', | 
|  | -                    linker_exe='gcc -g', | 
|  | -                    linker_so='gcc -g -shared') | 
|  | +                    compiler='gcc -march=x86-64 -mtune=generic -DMS_WIN64' | 
|  | +                             ' -O2 -msse2 -Wall', | 
|  | +                    compiler_so='gcc -march=x86-64 -mtune=generic -DMS_WIN64' | 
|  | +                                ' -O2 -msse2 -Wall -Wstrict-prototypes', | 
|  | +                    linker_exe='gcc', | 
|  | +                    linker_so='gcc -shared -Wl,-gc-sections -Wl,-s') | 
|  | else: | 
|  | if self.gcc_version <= "3.0.0": | 
|  | self.set_executables( | 
|  | @@ -145,10 +147,16 @@ class Mingw32CCompiler(distutils.cygwinccompiler.CygwinCCompiler): | 
|  | linker_so='g++ -mno-cygwin -shared') | 
|  | else: | 
|  | # gcc-4 series releases do not support -mno-cygwin option | 
|  | -                self.set_executables(compiler='gcc -O2 -Wall', | 
|  | -                                     compiler_so='gcc -O2 -Wall -Wstrict-prototypes', | 
|  | -                                     linker_exe='g++ ', | 
|  | -                                     linker_so='g++ -shared') | 
|  | +                self.set_executables( | 
|  | +                    compiler='gcc -O2 -march=core2 -mtune=generic' | 
|  | +                             ' -mfpmath=sse -msse2' | 
|  | +                             ' -mincoming-stack-boundary=2 -Wall', | 
|  | +                    compiler_so='gcc -O2 -march=core2 -mtune=generic' | 
|  | +                                ' -mfpmath=sse -msse2' | 
|  | +                                ' -mincoming-stack-boundary=2 -Wall' | 
|  | +                                ' -Wstrict-prototypes', | 
|  | +                    linker_exe='g++ ', | 
|  | +                    linker_so='g++ -shared -Wl,-gc-sections -Wl,-s') | 
|  | # added for python2.3 support | 
|  | # we can't pass it through set_executables because pre 2.2 would fail | 
|  | self.compiler_cxx = ['g++'] |