--- numpy-1.21.2/numpy/distutils/mingw32ccompiler.py.orig	2021-11-10 06:32:17.306962300 +0100
+++ numpy-1.21.2/numpy/distutils/mingw32ccompiler.py	2021-11-10 06:34:08.568379600 +0100
@@ -86,17 +86,23 @@
         # Py_ModuleInit4_64, etc... So we add it here
         if get_build_architecture() == 'AMD64':
             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:
             self.set_executables(
-                compiler='gcc -O2 -Wall',
-                compiler_so='gcc -O2 -Wall -Wstrict-prototypes',
+                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')
+                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++']