Merge pull request numpy#20333 from lazka/mingw-remove-old-version-checks

DEP: remove code for supporting GCC <4 in Mingw32CCompiler

Author: mattip

numpy/distutils/mingw32ccompiler.py

@@ -24,7 +24,6 @@
 # 3. Force windows to use g77
 
 import distutils.cygwinccompiler
-from distutils.version import StrictVersion
 from distutils.unixccompiler import UnixCCompiler
 from distutils.msvccompiler import get_build_version as get_build_msvc_version
 from distutils.errors import UnknownFileError
@@ -62,35 +61,6 @@ def __init__ (self,
         distutils.cygwinccompiler.CygwinCCompiler.__init__ (self, verbose,
                                                             dry_run, force)
 
-        # we need to support 3.2 which doesn't match the standard
-        # get_versions methods regex
-        if self.gcc_version is None:
-            try:
-                out_string  = subprocess.check_output(['gcc', '-dumpversion'])
-            except (OSError, CalledProcessError):
-                out_string = ""  # ignore failures to match old behavior
-            result = re.search(r'(\d+\.\d+)', out_string)
-            if result:
-                self.gcc_version = StrictVersion(result.group(1))
-
-        # A real mingw32 doesn't need to specify a different entry point,
-        # but cygwin 2.91.57 in no-cygwin-mode needs it.
-        if self.gcc_version <= "2.91.57":
-            entry_point = '--entry _DllMain@12'
-        else:
-            entry_point = ''
-
-        if self.linker_dll == 'dllwrap':
-            # Commented out '--driver-name g++' part that fixes weird
-            #   g++.exe: g++: No such file or directory
-            # error (mingw 1.0 in Enthon24 tree, gcc-3.4.5).
-            # If the --driver-name part is required for some environment
-            # then make the inclusion of this part specific to that
-            # environment.
-            self.linker = 'dllwrap' #  --driver-name g++'
-        elif self.linker_dll == 'gcc':
-            self.linker = 'g++'
-
         # **changes: eric jones 4/11/01
         # 1. Check for import library on Windows.  Build if it doesn't exist.
 
@@ -113,42 +83,18 @@ def __init__ (self,
         # kind of bad consequences, like using Py_ModuleInit4 instead of
         # Py_ModuleInit4_64, etc... So we add it here
         if get_build_architecture() == 'AMD64':
-            if self.gcc_version < "4.0":
-                self.set_executables(
-                    compiler='gcc -g -DDEBUG -DMS_WIN64 -mno-cygwin -O0 -Wall',
-                    compiler_so='gcc -g -DDEBUG -DMS_WIN64 -mno-cygwin -O0'
-                                ' -Wall -Wstrict-prototypes',
-                    linker_exe='gcc -g -mno-cygwin',
-                    linker_so='gcc -g -mno-cygwin -shared')
-            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')
+            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')
         else:
-            if self.gcc_version <= "3.0.0":
-                self.set_executables(
-                    compiler='gcc -mno-cygwin -O2 -w',
-                    compiler_so='gcc -mno-cygwin -mdll -O2 -w'
-                                ' -Wstrict-prototypes',
-                    linker_exe='g++ -mno-cygwin',
-                    linker_so='%s -mno-cygwin -mdll -static %s' %
-                              (self.linker, entry_point))
-            elif self.gcc_version < "4.0":
-                self.set_executables(
-                    compiler='gcc -mno-cygwin -O2 -Wall',
-                    compiler_so='gcc -mno-cygwin -O2 -Wall'
-                                ' -Wstrict-prototypes',
-                    linker_exe='g++ -mno-cygwin',
-                    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 -Wall',
+                compiler_so='gcc -O2 -Wall -Wstrict-prototypes',
+                linker_exe='g++ ',
+                linker_so='g++ -shared')
         # added for python2.3 support
         # we can't pass it through set_executables because pre 2.2 would fail
         self.compiler_cxx = ['g++']
@@ -198,10 +144,7 @@ def link(self,
                 extra_postargs,
                 build_temp,
                 target_lang)
-        if self.gcc_version < "3.0.0":
-            func = distutils.cygwinccompiler.CygwinCCompiler.link
-        else:
-            func = UnixCCompiler.link
+        func = UnixCCompiler.link
         func(*args[:func.__code__.co_argcount])
         return