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mingw32ccompiler.py
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""" Support code for building Python extensions on Windows. # NT stuff # 1. Make sure libpython<version>.a exists for gcc. If not, build it. # 2. Force windows to use gcc (we're struggling with MSVC and g77 support) # 3. Force windows to use g77 """ import os import sys import subprocess import re import textwrap # Overwrite certain distutils.ccompiler functions: import numpy.distutils.ccompiler # noqa: F401 from numpy.distutils import log # NT stuff # 1. Make sure libpython<version>.a exists for gcc. If not, build it. # 2. Force windows to use gcc (we're struggling with MSVC and g77 support) # --> this is done in numpy/distutils/ccompiler.py # 3. Force windows to use g77 import distutils.cygwinccompiler from distutils.unixccompiler import UnixCCompiler from distutils.msvccompiler import get_build_version as get_build_msvc_version from distutils.errors import UnknownFileError from numpy.distutils.misc_util import (msvc_runtime_library, msvc_runtime_version, msvc_runtime_major, get_build_architecture) def get_msvcr_replacement(): """Replacement for outdated version of get_msvcr from cygwinccompiler""" msvcr = msvc_runtime_library() return [] if msvcr is None else [msvcr] # Useful to generate table of symbols from a dll _START = re.compile(r'\[Ordinal/Name Pointer\] Table') _TABLE = re.compile(r'^\s+\[([\s*[0-9]*)\] ([a-zA-Z0-9_]*)') # the same as cygwin plus some additional parameters class Mingw32CCompiler(distutils.cygwinccompiler.CygwinCCompiler): """ A modified MingW32 compiler compatible with an MSVC built Python. """ compiler_type = 'mingw32' def __init__ (self, verbose=0, dry_run=0, force=0): distutils.cygwinccompiler.CygwinCCompiler.__init__ (self, verbose, dry_run, force) # **changes: eric jones 4/11/01 # 1. Check for import library on Windows. Build if it doesn't exist. build_import_library() # Check for custom msvc runtime library on Windows. Build if it doesn't exist. msvcr_success = build_msvcr_library() msvcr_dbg_success = build_msvcr_library(debug=True) if msvcr_success or msvcr_dbg_success: # add preprocessor statement for using customized msvcr lib self.define_macro('NPY_MINGW_USE_CUSTOM_MSVCR') # Define the MSVC version as hint for MinGW msvcr_version = msvc_runtime_version() if msvcr_version: self.define_macro('__MSVCRT_VERSION__', '0x%04i' % msvcr_version) # MS_WIN64 should be defined when building for amd64 on windows, # but python headers define it only for MS compilers, which has all # kind of bad consequences, like using Py_ModuleInit4 instead of # 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') else: 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++'] # 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=[] return # __init__ () def link(self, target_desc, objects, output_filename, output_dir, libraries, library_dirs, runtime_library_dirs, export_symbols = None, debug=0, extra_preargs=None, extra_postargs=None, build_temp=None, target_lang=None): # Include the appropriate MSVC runtime library if Python was built # with MSVC >= 7.0 (MinGW standard is msvcrt) runtime_library = msvc_runtime_library() if runtime_library: if not libraries: libraries = [] libraries.append(runtime_library) args = (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) func = UnixCCompiler.link func(*args[:func.__code__.co_argcount]) return def object_filenames (self, source_filenames, strip_dir=0, output_dir=''): 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)) # added these lines to strip off windows drive letters # without it, .o files are placed next to .c files # instead of the build directory drv, base = os.path.splitdrive(base) if drv: base = base[1:] 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 == '.res' or ext == '.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 # object_filenames () def find_python_dll(): # We can't do much here: # - find it in the virtualenv (sys.prefix) # - find it in python main dir (sys.base_prefix, if in a virtualenv) # - in system32, # - ortherwise (Sxs), I don't know how to get it. stems = [sys.prefix] if sys.base_prefix != sys.prefix: stems.append(sys.base_prefix) sub_dirs = ['', 'lib', 'bin'] # generate possible combinations of directory trees and sub-directories lib_dirs = [] for stem in stems: for folder in sub_dirs: lib_dirs.append(os.path.join(stem, folder)) # add system directory as well if 'SYSTEMROOT' in os.environ: lib_dirs.append(os.path.join(os.environ['SYSTEMROOT'], 'System32')) # search in the file system for possible candidates major_version, minor_version = tuple(sys.version_info[:2]) implementation = sys.implementation.name if implementation == 'cpython': dllname = f'python{major_version}{minor_version}.dll' elif implementation == 'pypy': dllname = f'libpypy{major_version}.{minor_version}-c.dll' else: dllname = f'Unknown platform {implementation}' print("Looking for %s" % dllname) for folder in lib_dirs: dll = os.path.join(folder, dllname) if os.path.exists(dll): return dll raise ValueError("%s not found in %s" % (dllname, lib_dirs)) def dump_table(dll): st = subprocess.check_output(["objdump.exe", "-p", dll]) return st.split(b'\n') def generate_def(dll, dfile): """Given a dll file location, get all its exported symbols and dump them into the given def file. The .def file will be overwritten""" dump = dump_table(dll) for i in range(len(dump)): if _START.match(dump[i].decode()): break else: raise ValueError("Symbol table not found") syms = [] for j in range(i+1, len(dump)): m = _TABLE.match(dump[j].decode()) if m: syms.append((int(m.group(1).strip()), m.group(2))) else: break if len(syms) == 0: log.warn('No symbols found in %s' % dll) with open(dfile, 'w') as d: d.write('LIBRARY %s\n' % os.path.basename(dll)) d.write(';CODE PRELOAD MOVEABLE DISCARDABLE\n') d.write(';DATA PRELOAD SINGLE\n') d.write('\nEXPORTS\n') for s in syms: #d.write('@%d %s\n' % (s[0], s[1])) d.write('%s\n' % s[1]) def find_dll(dll_name): arch = {'AMD64' : 'amd64', 'Intel' : 'x86'}[get_build_architecture()] def _find_dll_in_winsxs(dll_name): # Walk through the WinSxS directory to find the dll. winsxs_path = os.path.join(os.environ.get('WINDIR', r'C:\WINDOWS'), 'winsxs') if not os.path.exists(winsxs_path): return None for root, dirs, files in os.walk(winsxs_path): if dll_name in files and arch in root: return os.path.join(root, dll_name) return None def _find_dll_in_path(dll_name): # First, look in the Python directory, then scan PATH for # the given dll name. for path in [sys.prefix] + os.environ['PATH'].split(';'): filepath = os.path.join(path, dll_name) if os.path.exists(filepath): return os.path.abspath(filepath) return _find_dll_in_winsxs(dll_name) or _find_dll_in_path(dll_name) def build_msvcr_library(debug=False): if os.name != 'nt': return False # If the version number is None, then we couldn't find the MSVC runtime at # all, because we are running on a Python distribution which is customed # compiled; trust that the compiler is the same as the one available to us # now, and that it is capable of linking with the correct runtime without # any extra options. msvcr_ver = msvc_runtime_major() if msvcr_ver is None: log.debug('Skip building import library: ' 'Runtime is not compiled with MSVC') return False # Skip using a custom library for versions < MSVC 8.0 if msvcr_ver < 80: log.debug('Skip building msvcr library:' ' custom functionality not present') return False msvcr_name = msvc_runtime_library() if debug: msvcr_name += 'd' # Skip if custom library already exists out_name = "lib%s.a" % msvcr_name out_file = os.path.join(sys.prefix, 'libs', out_name) if os.path.isfile(out_file): log.debug('Skip building msvcr library: "%s" exists' % (out_file,)) return True # Find the msvcr dll msvcr_dll_name = msvcr_name + '.dll' dll_file = find_dll(msvcr_dll_name) if not dll_file: log.warn('Cannot build msvcr library: "%s" not found' % msvcr_dll_name) return False def_name = "lib%s.def" % msvcr_name def_file = os.path.join(sys.prefix, 'libs', def_name) log.info('Building msvcr library: "%s" (from %s)' \ % (out_file, dll_file)) # Generate a symbol definition file from the msvcr dll generate_def(dll_file, def_file) # Create a custom mingw library for the given symbol definitions cmd = ['dlltool', '-d', def_file, '-l', out_file] retcode = subprocess.call(cmd) # Clean up symbol definitions os.remove(def_file) return (not retcode) def build_import_library(): if os.name != 'nt': return arch = get_build_architecture() if arch == 'AMD64': return _build_import_library_amd64() elif arch == 'Intel': return _build_import_library_x86() else: raise ValueError("Unhandled arch %s" % arch) def _check_for_import_lib(): """Check if an import library for the Python runtime already exists.""" major_version, minor_version = tuple(sys.version_info[:2]) # patterns for the file name of the library itself patterns = ['libpython%d%d.a', 'libpython%d%d.dll.a', 'libpython%d.%d.dll.a'] # directory trees that may contain the library stems = [sys.prefix] if hasattr(sys, 'base_prefix') and sys.base_prefix != sys.prefix: stems.append(sys.base_prefix) elif hasattr(sys, 'real_prefix') and sys.real_prefix != sys.prefix: stems.append(sys.real_prefix) # possible subdirectories within those trees where it is placed sub_dirs = ['libs', 'lib'] # generate a list of candidate locations candidates = [] for pat in patterns: filename = pat % (major_version, minor_version) for stem_dir in stems: for folder in sub_dirs: candidates.append(os.path.join(stem_dir, folder, filename)) # test the filesystem to see if we can find any of these for fullname in candidates: if os.path.isfile(fullname): # already exists, in location given return (True, fullname) # needs to be built, preferred location given first return (False, candidates[0]) def _build_import_library_amd64(): out_exists, out_file = _check_for_import_lib() if out_exists: log.debug('Skip building import library: "%s" exists', out_file) return # get the runtime dll for which we are building import library dll_file = find_python_dll() log.info('Building import library (arch=AMD64): "%s" (from %s)' % (out_file, dll_file)) # generate symbol list from this library def_name = "python%d%d.def" % tuple(sys.version_info[:2]) def_file = os.path.join(sys.prefix, 'libs', def_name) generate_def(dll_file, def_file) # generate import library from this symbol list cmd = ['dlltool', '-d', def_file, '-l', out_file] subprocess.check_call(cmd) def _build_import_library_x86(): """ Build the import libraries for Mingw32-gcc on Windows """ out_exists, out_file = _check_for_import_lib() if out_exists: log.debug('Skip building import library: "%s" exists', out_file) return lib_name = "python%d%d.lib" % tuple(sys.version_info[:2]) lib_file = os.path.join(sys.prefix, 'libs', lib_name) if not os.path.isfile(lib_file): # didn't find library file in virtualenv, try base distribution, too, # and use that instead if found there. for Python 2.7 venvs, the base # directory is in attribute real_prefix instead of base_prefix. if hasattr(sys, 'base_prefix'): base_lib = os.path.join(sys.base_prefix, 'libs', lib_name) elif hasattr(sys, 'real_prefix'): base_lib = os.path.join(sys.real_prefix, 'libs', lib_name) else: base_lib = '' # os.path.isfile('') == False if os.path.isfile(base_lib): lib_file = base_lib else: log.warn('Cannot build import library: "%s" not found', lib_file) return log.info('Building import library (ARCH=x86): "%s"', out_file) from numpy.distutils import lib2def def_name = "python%d%d.def" % tuple(sys.version_info[:2]) def_file = os.path.join(sys.prefix, 'libs', def_name) nm_output = lib2def.getnm( lib2def.DEFAULT_NM + [lib_file], shell=False) dlist, flist = lib2def.parse_nm(nm_output) with open(def_file, 'w') as fid: lib2def.output_def(dlist, flist, lib2def.DEF_HEADER, fid) dll_name = find_python_dll () cmd = ["dlltool", "--dllname", dll_name, "--def", def_file, "--output-lib", out_file] status = subprocess.check_output(cmd) if status: log.warn('Failed to build import library for gcc. Linking will fail.') return #===================================== # Dealing with Visual Studio MANIFESTS #===================================== # Functions to deal with visual studio manifests. Manifest are a mechanism to # enforce strong DLL versioning on windows, and has nothing to do with # distutils MANIFEST. manifests are XML files with version info, and used by # the OS loader; they are necessary when linking against a DLL not in the # system path; in particular, official python 2.6 binary is built against the # MS runtime 9 (the one from VS 2008), which is not available on most windows # systems; python 2.6 installer does install it in the Win SxS (Side by side) # directory, but this requires the manifest for this to work. This is a big # mess, thanks MS for a wonderful system. # XXX: ideally, we should use exactly the same version as used by python. I # submitted a patch to get this version, but it was only included for python # 2.6.1 and above. So for versions below, we use a "best guess". _MSVCRVER_TO_FULLVER = {} if sys.platform == 'win32': try: import msvcrt # I took one version in my SxS directory: no idea if it is the good # one, and we can't retrieve it from python _MSVCRVER_TO_FULLVER['80'] = "8.0.50727.42" _MSVCRVER_TO_FULLVER['90'] = "9.0.21022.8" # Value from msvcrt.CRT_ASSEMBLY_VERSION under Python 3.3.0 # on Windows XP: _MSVCRVER_TO_FULLVER['100'] = "10.0.30319.460" crt_ver = getattr(msvcrt, 'CRT_ASSEMBLY_VERSION', None) if crt_ver is not None: # Available at least back to Python 3.3 maj, min = re.match(r'(\d+)\.(\d)', crt_ver).groups() _MSVCRVER_TO_FULLVER[maj + min] = crt_ver del maj, min del crt_ver except ImportError: # If we are here, means python was not built with MSVC. Not sure what # to do in that case: manifest building will fail, but it should not be # used in that case anyway log.warn('Cannot import msvcrt: using manifest will not be possible') def msvc_manifest_xml(maj, min): """Given a major and minor version of the MSVCR, returns the corresponding XML file.""" try: fullver = _MSVCRVER_TO_FULLVER[str(maj * 10 + min)] except KeyError: raise ValueError("Version %d,%d of MSVCRT not supported yet" % (maj, min)) from None # Don't be fooled, it looks like an XML, but it is not. In particular, it # should not have any space before starting, and its size should be # divisible by 4, most likely for alignment constraints when the xml is # embedded in the binary... # This template was copied directly from the python 2.6 binary (using # strings.exe from mingw on python.exe). template = textwrap.dedent("""\ <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3"> <security> <requestedPrivileges> <requestedExecutionLevel level="asInvoker" uiAccess="false"></requestedExecutionLevel> </requestedPrivileges> </security> </trustInfo> <dependency> <dependentAssembly> <assemblyIdentity type="win32" name="Microsoft.VC%(maj)d%(min)d.CRT" version="%(fullver)s" processorArchitecture="*" publicKeyToken="1fc8b3b9a1e18e3b"></assemblyIdentity> </dependentAssembly> </dependency> </assembly>""") return template % {'fullver': fullver, 'maj': maj, 'min': min} def manifest_rc(name, type='dll'): """Return the rc file used to generate the res file which will be embedded as manifest for given manifest file name, of given type ('dll' or 'exe'). Parameters ---------- name : str name of the manifest file to embed type : str {'dll', 'exe'} type of the binary which will embed the manifest """ if type == 'dll': rctype = 2 elif type == 'exe': rctype = 1 else: raise ValueError("Type %s not supported" % type) return """\ #include "winuser.h" %d RT_MANIFEST %s""" % (rctype, name) def check_embedded_msvcr_match_linked(msver): """msver is the ms runtime version used for the MANIFEST.""" # check msvcr major version are the same for linking and # embedding maj = msvc_runtime_major() if maj: if not maj == int(msver): raise ValueError( "Discrepancy between linked msvcr " \ "(%d) and the one about to be embedded " \ "(%d)" % (int(msver), maj)) def configtest_name(config): base = os.path.basename(config._gen_temp_sourcefile("yo", [], "c")) return os.path.splitext(base)[0] def manifest_name(config): # Get configest name (including suffix) root = configtest_name(config) exext = config.compiler.exe_extension return root + exext + ".manifest" def rc_name(config): # Get configtest name (including suffix) root = configtest_name(config) return root + ".rc" def generate_manifest(config): msver = get_build_msvc_version() if msver is not None: if msver >= 8: check_embedded_msvcr_match_linked(msver) ma_str, mi_str = str(msver).split('.') # Write the manifest file manxml = msvc_manifest_xml(int(ma_str), int(mi_str)) with open(manifest_name(config), "w") as man: config.temp_files.append(manifest_name(config)) man.write(manxml)