"""distutils.cygwinccompiler Provides the CygwinCCompiler class, a subclass of UnixCCompiler that handles the Cygwin port of the GNU C compiler to Windows. It also contains the Mingw32CCompiler class which handles the mingw32 port of GCC (same as cygwin in no-cygwin mode). """ # problems: # # * if you use a msvc compiled python version (1.5.2) # 1. you have to insert a __GNUC__ section in its config.h # 2. you have to generate an import library for its dll # - create a def-file for python??.dll # - create an import library using # dlltool --dllname python15.dll --def python15.def \ # --output-lib libpython15.a # # see also http://starship.python.net/crew/kernr/mingw32/Notes.html # # * We put export_symbols in a def-file, and don't use # --export-all-symbols because it doesn't worked reliable in some # tested configurations. And because other windows compilers also # need their symbols specified this no serious problem. # # tested configurations: # # * cygwin gcc 2.91.57/ld 2.9.4/dllwrap 0.2.4 works # (after patching python's config.h and for C++ some other include files) # see also http://starship.python.net/crew/kernr/mingw32/Notes.html # * mingw32 gcc 2.95.2/ld 2.9.4/dllwrap 0.2.4 works # (ld doesn't support -shared, so we use dllwrap) # * cygwin gcc 2.95.2/ld 2.10.90/dllwrap 2.10.90 works now # - its dllwrap doesn't work, there is a bug in binutils 2.10.90 # see also http://sources.redhat.com/ml/cygwin/2000-06/msg01274.html # - using gcc -mdll instead dllwrap doesn't work without -static because # it tries to link against dlls instead their import libraries. (If # it finds the dll first.) # By specifying -static we force ld to link against the import libraries, # this is windows standard and there are normally not the necessary symbols # in the dlls. # *** only the version of June 2000 shows these problems # * cygwin gcc 3.2/ld 2.13.90 works # (ld supports -shared) # * mingw gcc 3.2/ld 2.13 works # (ld supports -shared) # * llvm-mingw with Clang 11 works # (lld supports -shared) import os import sys import copy import shlex import warnings from subprocess import check_output from distutils.unixccompiler import UnixCCompiler from distutils.file_util import write_file from distutils.errors import ( DistutilsExecError, CCompilerError, CompileError, UnknownFileError, ) from distutils.version import LooseVersion, suppress_known_deprecation def get_msvcr(): """Include the appropriate MSVC runtime library if Python was built with MSVC 7.0 or later. """ msc_pos = sys.version.find('MSC v.') if msc_pos != -1: msc_ver = sys.version[msc_pos + 6 : msc_pos + 10] if msc_ver == '1300': # MSVC 7.0 return ['msvcr70'] elif msc_ver == '1310': # MSVC 7.1 return ['msvcr71'] elif msc_ver == '1400': # VS2005 / MSVC 8.0 return ['msvcr80'] elif msc_ver == '1500': # VS2008 / MSVC 9.0 return ['msvcr90'] elif msc_ver == '1600': # VS2010 / MSVC 10.0 return ['msvcr100'] elif msc_ver == '1700': # VS2012 / MSVC 11.0 return ['msvcr110'] elif msc_ver == '1800': # VS2013 / MSVC 12.0 return ['msvcr120'] elif 1900 <= int(msc_ver) < 2000: # VS2015 / MSVC 14.0 return ['ucrt', 'vcruntime140'] else: raise ValueError("Unknown MS Compiler version %s " % msc_ver) class CygwinCCompiler(UnixCCompiler): """Handles the Cygwin port of the GNU C compiler to Windows.""" compiler_type = 'cygwin' obj_extension = ".o" static_lib_extension = ".a" shared_lib_extension = ".dll.a" dylib_lib_extension = ".dll" static_lib_format = "lib%s%s" shared_lib_format = "lib%s%s" dylib_lib_format = "cyg%s%s" exe_extension = ".exe" def __init__(self, verbose=0, dry_run=0, force=0): super().__init__(verbose, dry_run, force) status, details = check_config_h() self.debug_print("Python's GCC status: %s (details: %s)" % (status, details)) if status is not CONFIG_H_OK: self.warn( "Python's pyconfig.h doesn't seem to support your compiler. " "Reason: %s. " "Compiling may fail because of undefined preprocessor macros." % details ) self.cc = os.environ.get('CC', 'gcc') self.cxx = os.environ.get('CXX', 'g++') self.linker_dll = self.cc shared_option = "-shared" self.set_executables( compiler='%s -mcygwin -O -Wall' % self.cc, compiler_so='%s -mcygwin -mdll -O -Wall' % self.cc, compiler_cxx='%s -mcygwin -O -Wall' % self.cxx, linker_exe='%s -mcygwin' % self.cc, linker_so=('%s -mcygwin %s' % (self.linker_dll, shared_option)), ) # Include the appropriate MSVC runtime library if Python was built # with MSVC 7.0 or later. self.dll_libraries = get_msvcr() @property def gcc_version(self): # Older numpy dependend on this existing to check for ancient # gcc versions. This doesn't make much sense with clang etc so # just hardcode to something recent. # https://github.com/numpy/numpy/pull/20333 warnings.warn( "gcc_version attribute of CygwinCCompiler is deprecated. " "Instead of returning actual gcc version a fixed value 11.2.0 is returned.", DeprecationWarning, stacklevel=2, ) with suppress_known_deprecation(): return LooseVersion("11.2.0") def _compile(self, obj, src, ext, cc_args, extra_postargs, pp_opts): """Compiles the source by spawning GCC and windres if needed.""" if ext == '.rc' or ext == '.res': # gcc needs '.res' and '.rc' compiled to object files !!! try: self.spawn(["windres", "-i", src, "-o", obj]) except DistutilsExecError as msg: raise CompileError(msg) else: # for other files use the C-compiler try: self.spawn( self.compiler_so + cc_args + [src, '-o', obj] + extra_postargs ) except DistutilsExecError as msg: raise CompileError(msg) def link( self, target_desc, 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, build_temp=None, target_lang=None, ): """Link the objects.""" # use separate copies, so we can modify the lists extra_preargs = copy.copy(extra_preargs or []) libraries = copy.copy(libraries or []) objects = copy.copy(objects or []) # Additional libraries libraries.extend(self.dll_libraries) # handle export symbols by creating a def-file # with executables this only works with gcc/ld as linker if (export_symbols is not None) and ( target_desc != self.EXECUTABLE or self.linker_dll == "gcc" ): # (The linker doesn't do anything if output is up-to-date. # So 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 we want.) # we want to put some files in the same directory as the # object files are, build_temp doesn't help much # where are the object files temp_dir = os.path.dirname(objects[0]) # name of dll to give the helper files the same base name (dll_name, dll_extension) = os.path.splitext( os.path.basename(output_filename) ) # generate the filenames for these files def_file = os.path.join(temp_dir, dll_name + ".def") lib_file = os.path.join(temp_dir, 'lib' + dll_name + ".a") # Generate .def file contents = ["LIBRARY %s" % os.path.basename(output_filename), "EXPORTS"] for sym in export_symbols: contents.append(sym) self.execute(write_file, (def_file, contents), "writing %s" % def_file) # next add options for def-file and to creating import libraries # doesn't work: bfd_close build\...\libfoo.a: Invalid operation # extra_preargs.extend(["-Wl,--out-implib,%s" % lib_file]) # for gcc/ld the def-file is specified as any object files objects.append(def_file) # end: if ((export_symbols is not None) and # (target_desc != self.EXECUTABLE or self.linker_dll == "gcc")): # who wants symbols and a many times larger output file # should explicitly switch the debug mode on # otherwise we let ld strip the output file # (On my machine: 10KiB < stripped_file < ??100KiB # unstripped_file = stripped_file + XXX KiB # ( XXX=254 for a typical python extension)) if not debug: extra_preargs.append("-s") UnixCCompiler.link( self, target_desc, objects, output_filename, output_dir, libraries, library_dirs, runtime_library_dirs, None, # export_symbols, we do this in our def-file debug, extra_preargs, extra_postargs, build_temp, target_lang, ) # -- Miscellaneous methods ----------------------------------------- def object_filenames(self, source_filenames, strip_dir=0, output_dir=''): """Adds supports for rc and res files.""" if output_dir is None: output_dir = '' obj_names = [] for src_name in source_filenames: # use normcase to make sure '.rc' is really '.rc' and not '.RC' base, ext = os.path.splitext(os.path.normcase(src_name)) if ext not in (self.src_extensions + ['.rc', '.res']): raise UnknownFileError( "unknown file type '%s' (from '%s')" % (ext, src_name) ) if strip_dir: base = os.path.basename(base) if ext in ('.res', '.rc'): # these need to be compiled to object files obj_names.append( os.path.join(output_dir, base + ext + self.obj_extension) ) else: obj_names.append(os.path.join(output_dir, base + self.obj_extension)) return obj_names # the same as cygwin plus some additional parameters class Mingw32CCompiler(CygwinCCompiler): """Handles the Mingw32 port of the GNU C compiler to Windows.""" compiler_type = 'mingw32' def __init__(self, verbose=0, dry_run=0, force=0): super().__init__(verbose, dry_run, force) shared_option = "-shared" if is_cygwincc(self.cc): raise CCompilerError('Cygwin gcc cannot be used with --compiler=mingw32') self.set_executables( compiler='%s -O -Wall' % self.cc, compiler_so='%s -mdll -O -Wall' % self.cc, compiler_cxx='%s -O -Wall' % self.cxx, linker_exe='%s' % self.cc, linker_so='%s %s' % (self.linker_dll, shared_option), ) # Maybe we should also append -mthreads, but then the finished # dlls need another dll (mingwm10.dll see Mingw32 docs) # (-mthreads: Support thread-safe exception handling on `Mingw32') # no additional libraries needed self.dll_libraries = [] # Include the appropriate MSVC runtime library if Python was built # with MSVC 7.0 or later. self.dll_libraries = get_msvcr() # Because these compilers aren't configured in Python's pyconfig.h file by # default, we should at least warn the user if he is using an unmodified # version. CONFIG_H_OK = "ok" CONFIG_H_NOTOK = "not ok" CONFIG_H_UNCERTAIN = "uncertain" def check_config_h(): """Check if the current Python installation appears amenable to building extensions with GCC. Returns a tuple (status, details), where 'status' is one of the following constants: - CONFIG_H_OK: all is well, go ahead and compile - CONFIG_H_NOTOK: doesn't look good - CONFIG_H_UNCERTAIN: not sure -- unable to read pyconfig.h 'details' is a human-readable string explaining the situation. Note there are two ways to conclude "OK": either 'sys.version' contains the string "GCC" (implying that this Python was built with GCC), or the installed "pyconfig.h" contains the string "__GNUC__". """ # XXX since this function also checks sys.version, it's not strictly a # "pyconfig.h" check -- should probably be renamed... from distutils import sysconfig # if sys.version contains GCC then python was compiled with GCC, and the # pyconfig.h file should be OK if "GCC" in sys.version: return CONFIG_H_OK, "sys.version mentions 'GCC'" # Clang would also work if "Clang" in sys.version: return CONFIG_H_OK, "sys.version mentions 'Clang'" # let's see if __GNUC__ is mentioned in python.h fn = sysconfig.get_config_h_filename() try: config_h = open(fn) try: if "__GNUC__" in config_h.read(): return CONFIG_H_OK, "'%s' mentions '__GNUC__'" % fn else: return CONFIG_H_NOTOK, "'%s' does not mention '__GNUC__'" % fn finally: config_h.close() except OSError as exc: return (CONFIG_H_UNCERTAIN, "couldn't read '%s': %s" % (fn, exc.strerror)) def is_cygwincc(cc): '''Try to determine if the compiler that would be used is from cygwin.''' out_string = check_output(shlex.split(cc) + ['-dumpmachine']) return out_string.strip().endswith(b'cygwin') get_versions = None """ A stand-in for the previous get_versions() function to prevent failures when monkeypatched. See pypa/setuptools#2969. """