Implementation of the CCompiler class for Cygwin and Mingw32, ie. the two

gward · gward · commit 7c6395a6a30e · 2000-06-21T03:33:03.000Z
major ports of GCC to Windows.  Contributed by Rene Liebscher, and quite
untested by me.  Apparently requires tweaking Python's installed config.h
and adding a libpython.a to build extensions.
diff --git a/Lib/distutils/cygwinccompiler.py b/Lib/distutils/cygwinccompiler.py
@@ -0,0 +1,181 @@
+"""distutils.cygwinccompiler
+
+Contains the CygwinCCompiler class, a subclass of UnixCCompiler that handles
+the Gnu Win32 C compiler.
+It also contains the Mingw32CCompiler class which handles the mingw32 compiler
+(same as cygwin in no-cygwin mode.)
+
+"""
+
+# created 2000/05/05, Rene Liebscher
+
+__revision__ = "$Id$"
+
+import os,sys,string,tempfile
+from distutils import sysconfig
+from distutils.unixccompiler import UnixCCompiler
+
+# Because these compilers aren't configured in Python's config.h file by default
+# we should at least warn the user if he used this unmodified version. 
+def check_if_config_h_is_gcc_ready():
+        """ checks, if the gcc-compiler is mentioned in config.h 
+            if it is not, compiling probably doesn't work """ 
+        from distutils import sysconfig
+        import string,sys
+        try:
+                # It would probably better to read single lines to search.
+                # But we do this only once, and it is fast enough 
+                f=open(sysconfig.get_config_h_filename())
+                s=f.read()
+                f.close()
+                try:
+                        string.index(s,"__GNUC__") # is somewhere a #ifdef __GNUC__ or something similar
+                except:
+                        sys.stderr.write ("warning: Python's config.h doesn't seem to support your compiler.\n")
+        except: # unspecific error => ignore
+                pass
+
+
+# This is called when the module is imported, so we make this check only once
+check_if_config_h_is_gcc_ready()
+
+
+# XXX Things not currently handled:
+#   * see UnixCCompiler
+
+class CygwinCCompiler (UnixCCompiler):
+
+    compiler_type = 'cygwin'
+   
+    def __init__ (self,
+                  verbose=0,
+                  dry_run=0,
+                  force=0):
+
+        UnixCCompiler.__init__ (self, verbose, dry_run, force)
+
+	# our compiler uses other names
+	self.cc='gcc'
+	self.ld_shared='dllwrap'
+	self.ldflags_shared=[]
+
+        # some variables to manage the differences between cygwin and mingw32
+        self.dllwrap_options=["--target=i386-cygwin32"]
+        # specification of entry point is not necessary
+        
+        self.dll_additional_libraries=[
+               # cygwin shouldn't need msvcrt, but without the dll's will crash
+               # perhaps something about initialization (Python uses it, too)
+               # mingw32 needs it in all cases
+                                        "msvcrt"
+                                      ]
+        
+    # __init__ ()
+
+    def link_shared_object (self,
+                            objects,
+                            output_filename,
+                            output_dir=None,
+                            libraries=None,
+                            library_dirs=None,
+                            runtime_library_dirs=None,
+                            export_symbols=None,
+			    debug=0,
+                            extra_preargs=None,
+                            extra_postargs=None):
+        
+        if libraries==None:
+                libraries=[]
+        
+        python_library=["python"+str(sys.hexversion>>24)+str((sys.hexversion>>16)&0xff)]
+        libraries=libraries+python_library+self.dll_additional_libraries
+        
+        # if you don't need the def-file afterwards, it is
+        # better to use for it tempfile.mktemp() as its name
+        # (unix-style compilers don't like backslashes in filenames)
+        win_dll_def_file=string.replace(tempfile.mktemp(),"\\","/")
+        #win_dll_def_file=output_filename[:-len(self.shared_lib_extension)]+".def"
+        #win_dll_exp_file=output_filename[:-len(self.shared_lib_extension)]+".exp"
+        #win_dll_lib_file=output_filename[:-len(self.shared_lib_extension)]+".a"
+        
+        # Make .def file
+        # (It would probably better to check if we really need this, but for this we had to
+        # insert some unchanged parts of UnixCCompiler, and this is not what I want.) 
+        f=open(win_dll_def_file,"w")
+        f.write("EXPORTS\n") # intro
+        # always export a function "init"+module_name
+        if not debug:
+                f.write("init"+os.path.basename(output_filename)[:-len(self.shared_lib_extension)]+"\n")
+        else: # in debug mode outfile_name is something like XXXXX_d.pyd
+                f.write("init"+os.path.basename(output_filename)[:-(len(self.shared_lib_extension)+2)]+"\n")
+        # if there are more symbols to export
+        # insert code here to write them in f
+        if export_symbols!=None: 
+            for sym in export_symbols:
+                f.write(sym+"\n")                
+        f.close()
+        
+        if extra_preargs==None:
+                extra_preargs=[]
+        
+        extra_preargs=extra_preargs+[
+                        #"--verbose",
+                        #"--output-exp",win_dll_exp_file,
+                        #"--output-lib",win_dll_lib_file,
+                        "--def",win_dll_def_file
+                        ]+ self.dllwrap_options
+        
+        # who wants symbols and a many times greater output file
+        # should explicitely switch the debug mode on 
+        # otherwise we let dllwrap strip the outputfile
+        # (On my machine unstripped_file=stripped_file+254KB
+        #   10KB < stripped_file < ??100KB ) 
+        if not debug: 
+                extra_preargs=extra_preargs+["-s"] 
+	
+	try:        
+    	    UnixCCompiler.link_shared_object(self,
+                            objects,
+                            output_filename,
+                            output_dir,
+                            libraries,
+                            library_dirs,
+                            runtime_library_dirs,
+			    None, # export_symbols, we do this with our def-file 
+                            debug,
+                            extra_preargs,
+                            extra_postargs)
+        finally: 
+    	    # we don't need the def-file anymore
+    	    os.remove(win_dll_def_file) 
+        
+    # link_shared_object ()
+
+# class CygwinCCompiler
+
+# the same as cygwin plus some additional parameters
+class Mingw32CCompiler (CygwinCCompiler):
+
+    compiler_type = 'mingw32'
+
+    def __init__ (self,
+                  verbose=0,
+                  dry_run=0,
+                  force=0):
+
+        CygwinCCompiler.__init__ (self, verbose, dry_run, force)
+
+        self.ccflags = self.ccflags + ["-mno-cygwin"]
+        self.dllwrap_options=[
+                                # mingw32 doesn't really need 'target' 
+                                # and cygwin too (it seems, it is enough
+                                # to specify a different entry point)                
+                                #"--target=i386-mingw32",
+                                "--entry","_DllMain@12"
+                                ]
+        # no additional libraries need 
+        # (only msvcrt, which is already added by CygwinCCompiler)
+
+    # __init__ ()
+                
+# class Mingw32CCompiler
