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gnu.py
import re import os import sys import warnings import platform import tempfile import hashlib import base64 import subprocess from subprocess import Popen, PIPE, STDOUT from numpy.distutils.exec_command import filepath_from_subprocess_output from numpy.distutils.fcompiler import FCompiler from distutils.version import LooseVersion compilers = ['GnuFCompiler', 'Gnu95FCompiler'] TARGET_R = re.compile(r"Target: ([a-zA-Z0-9_\-]*)") # XXX: handle cross compilation def is_win64(): return sys.platform == "win32" and platform.architecture()[0] == "64bit" class GnuFCompiler(FCompiler): compiler_type = 'gnu' compiler_aliases = ('g77', ) description = 'GNU Fortran 77 compiler' def gnu_version_match(self, version_string): """Handle the different versions of GNU fortran compilers""" # Strip warning(s) that may be emitted by gfortran while version_string.startswith('gfortran: warning'): version_string =\ version_string[version_string.find('\n') + 1:].strip() # Gfortran versions from after 2010 will output a simple string # (usually "x.y", "x.y.z" or "x.y.z-q") for ``-dumpversion``; older # gfortrans may still return long version strings (``-dumpversion`` was # an alias for ``--version``) if len(version_string) <= 20: # Try to find a valid version string m = re.search(r'([0-9.]+)', version_string) if m: # g77 provides a longer version string that starts with GNU # Fortran if version_string.startswith('GNU Fortran'): return ('g77', m.group(1)) # gfortran only outputs a version string such as #.#.#, so check # if the match is at the start of the string elif m.start() == 0: return ('gfortran', m.group(1)) else: # Output probably from --version, try harder: m = re.search(r'GNU Fortran\s+95.*?([0-9-.]+)', version_string) if m: return ('gfortran', m.group(1)) m = re.search( r'GNU Fortran.*?\-?([0-9-.]+\.[0-9-.]+)', version_string) if m: v = m.group(1) if v.startswith('0') or v.startswith('2') or v.startswith('3'): # the '0' is for early g77's return ('g77', v) else: # at some point in the 4.x series, the ' 95' was dropped # from the version string return ('gfortran', v) # If still nothing, raise an error to make the problem easy to find. err = 'A valid Fortran version was not found in this string:\n' raise ValueError(err + version_string) def version_match(self, version_string): v = self.gnu_version_match(version_string) if not v or v[0] != 'g77': return None return v[1] possible_executables = ['g77', 'f77'] executables = { 'version_cmd' : [None, "-dumpversion"], 'compiler_f77' : [None, "-g", "-Wall", "-fno-second-underscore"], 'compiler_f90' : None, # Use --fcompiler=gnu95 for f90 codes 'compiler_fix' : None, 'linker_so' : [None, "-g", "-Wall"], 'archiver' : ["ar", "-cr"], 'ranlib' : ["ranlib"], 'linker_exe' : [None, "-g", "-Wall"] } module_dir_switch = None module_include_switch = None # Cygwin: f771: warning: -fPIC ignored for target (all code is # position independent) if os.name != 'nt' and sys.platform != 'cygwin': pic_flags = ['-fPIC'] # use -mno-cygwin for g77 when Python is not Cygwin-Python if sys.platform == 'win32': for key in ['version_cmd', 'compiler_f77', 'linker_so', 'linker_exe']: executables[key].append('-mno-cygwin') g2c = 'g2c' suggested_f90_compiler = 'gnu95' def get_flags_linker_so(self): opt = self.linker_so[1:] if sys.platform == 'darwin': target = os.environ.get('MACOSX_DEPLOYMENT_TARGET', None) # If MACOSX_DEPLOYMENT_TARGET is set, we simply trust the value # and leave it alone. But, distutils will complain if the # environment's value is different from the one in the Python # Makefile used to build Python. We let distutils handle this # error checking. if not target: # If MACOSX_DEPLOYMENT_TARGET is not set in the environment, # we try to get it first from sysconfig and then # fall back to setting it to 10.9 This is a reasonable default # even when using the official Python dist and those derived # from it. import sysconfig target = sysconfig.get_config_var('MACOSX_DEPLOYMENT_TARGET') if not target: target = '10.9' s = f'Env. variable MACOSX_DEPLOYMENT_TARGET set to {target}' warnings.warn(s, stacklevel=2) os.environ['MACOSX_DEPLOYMENT_TARGET'] = str(target) opt.extend(['-undefined', 'dynamic_lookup', '-bundle']) else: opt.append("-shared") if sys.platform.startswith('sunos'): # SunOS often has dynamically loaded symbols defined in the # static library libg2c.a The linker doesn't like this. To # ignore the problem, use the -mimpure-text flag. It isn't # the safest thing, but seems to work. 'man gcc' says: # ".. Instead of using -mimpure-text, you should compile all # source code with -fpic or -fPIC." opt.append('-mimpure-text') return opt def get_libgcc_dir(self): try: output = subprocess.check_output(self.compiler_f77 + ['-print-libgcc-file-name']) except (OSError, subprocess.CalledProcessError): pass else: output = filepath_from_subprocess_output(output) return os.path.dirname(output) return None def get_libgfortran_dir(self): if sys.platform[:5] == 'linux': libgfortran_name = 'libgfortran.so' elif sys.platform == 'darwin': libgfortran_name = 'libgfortran.dylib' else: libgfortran_name = None libgfortran_dir = None if libgfortran_name: find_lib_arg = ['-print-file-name={0}'.format(libgfortran_name)] try: output = subprocess.check_output( self.compiler_f77 + find_lib_arg) except (OSError, subprocess.CalledProcessError): pass else: output = filepath_from_subprocess_output(output) libgfortran_dir = os.path.dirname(output) return libgfortran_dir def get_library_dirs(self): opt = [] if sys.platform[:5] != 'linux': d = self.get_libgcc_dir() if d: # if windows and not cygwin, libg2c lies in a different folder if sys.platform == 'win32' and not d.startswith('/usr/lib'): d = os.path.normpath(d) path = os.path.join(d, "lib%s.a" % self.g2c) if not os.path.exists(path): root = os.path.join(d, *((os.pardir, ) * 4)) d2 = os.path.abspath(os.path.join(root, 'lib')) path = os.path.join(d2, "lib%s.a" % self.g2c) if os.path.exists(path): opt.append(d2) opt.append(d) # For Macports / Linux, libgfortran and libgcc are not co-located lib_gfortran_dir = self.get_libgfortran_dir() if lib_gfortran_dir: opt.append(lib_gfortran_dir) return opt def get_libraries(self): opt = [] d = self.get_libgcc_dir() if d is not None: g2c = self.g2c + '-pic' f = self.static_lib_format % (g2c, self.static_lib_extension) if not os.path.isfile(os.path.join(d, f)): g2c = self.g2c else: g2c = self.g2c if g2c is not None: opt.append(g2c) c_compiler = self.c_compiler if sys.platform == 'win32' and c_compiler and \ c_compiler.compiler_type == 'msvc': opt.append('gcc') if sys.platform == 'darwin': opt.append('cc_dynamic') return opt def get_flags_debug(self): return ['-g'] def get_flags_opt(self): v = self.get_version() if v and v <= '3.3.3': # With this compiler version building Fortran BLAS/LAPACK # with -O3 caused failures in lib.lapack heevr,syevr tests. opt = ['-O2'] else: opt = ['-O3'] opt.append('-funroll-loops') return opt def _c_arch_flags(self): """ Return detected arch flags from CFLAGS """ import sysconfig try: cflags = sysconfig.get_config_vars()['CFLAGS'] except KeyError: return [] arch_re = re.compile(r"-arch\s+(\w+)") arch_flags = [] for arch in arch_re.findall(cflags): arch_flags += ['-arch', arch] return arch_flags def get_flags_arch(self): return [] def runtime_library_dir_option(self, dir): if sys.platform == 'win32' or sys.platform == 'cygwin': # Linux/Solaris/Unix support RPATH, Windows does not raise NotImplementedError # TODO: could use -Xlinker here, if it's supported assert "," not in dir if sys.platform == 'darwin': return f'-Wl,-rpath,{dir}' elif sys.platform.startswith(('aix', 'os400')): # AIX RPATH is called LIBPATH return f'-Wl,-blibpath:{dir}' else: return f'-Wl,-rpath={dir}' class Gnu95FCompiler(GnuFCompiler): compiler_type = 'gnu95' compiler_aliases = ('gfortran', ) description = 'GNU Fortran 95 compiler' def version_match(self, version_string): v = self.gnu_version_match(version_string) if not v or v[0] != 'gfortran': return None v = v[1] if LooseVersion(v) >= "4": # gcc-4 series releases do not support -mno-cygwin option pass else: # use -mno-cygwin flag for gfortran when Python is not # Cygwin-Python if sys.platform == 'win32': for key in [ 'version_cmd', 'compiler_f77', 'compiler_f90', 'compiler_fix', 'linker_so', 'linker_exe' ]: self.executables[key].append('-mno-cygwin') return v possible_executables = ['gfortran', 'f95'] executables = { 'version_cmd' : ["<F90>", "-dumpversion"], 'compiler_f77' : [None, "-Wall", "-g", "-ffixed-form", "-fno-second-underscore"], 'compiler_f90' : [None, "-Wall", "-g", "-fno-second-underscore"], 'compiler_fix' : [None, "-Wall", "-g","-ffixed-form", "-fno-second-underscore"], 'linker_so' : ["<F90>", "-Wall", "-g"], 'archiver' : ["ar", "-cr"], 'ranlib' : ["ranlib"], 'linker_exe' : [None, "-Wall"] } module_dir_switch = '-J' module_include_switch = '-I' if sys.platform.startswith(('aix', 'os400')): executables['linker_so'].append('-lpthread') if platform.architecture()[0][:2] == '64': for key in ['compiler_f77', 'compiler_f90','compiler_fix','linker_so', 'linker_exe']: executables[key].append('-maix64') g2c = 'gfortran' def _universal_flags(self, cmd): """Return a list of -arch flags for every supported architecture.""" if not sys.platform == 'darwin': return [] arch_flags = [] # get arches the C compiler gets. c_archs = self._c_arch_flags() if "i386" in c_archs: c_archs[c_archs.index("i386")] = "i686" # check the arches the Fortran compiler supports, and compare with # arch flags from C compiler for arch in ["ppc", "i686", "x86_64", "ppc64", "s390x"]: if _can_target(cmd, arch) and arch in c_archs: arch_flags.extend(["-arch", arch]) return arch_flags def get_flags(self): flags = GnuFCompiler.get_flags(self) arch_flags = self._universal_flags(self.compiler_f90) if arch_flags: flags[:0] = arch_flags return flags def get_flags_linker_so(self): flags = GnuFCompiler.get_flags_linker_so(self) arch_flags = self._universal_flags(self.linker_so) if arch_flags: flags[:0] = arch_flags return flags def get_library_dirs(self): opt = GnuFCompiler.get_library_dirs(self) if sys.platform == 'win32': c_compiler = self.c_compiler if c_compiler and c_compiler.compiler_type == "msvc": target = self.get_target() if target: d = os.path.normpath(self.get_libgcc_dir()) root = os.path.join(d, *((os.pardir, ) * 4)) path = os.path.join(root, "lib") mingwdir = os.path.normpath(path) if os.path.exists(os.path.join(mingwdir, "libmingwex.a")): opt.append(mingwdir) # For Macports / Linux, libgfortran and libgcc are not co-located lib_gfortran_dir = self.get_libgfortran_dir() if lib_gfortran_dir: opt.append(lib_gfortran_dir) return opt def get_libraries(self): opt = GnuFCompiler.get_libraries(self) if sys.platform == 'darwin': opt.remove('cc_dynamic') if sys.platform == 'win32': c_compiler = self.c_compiler if c_compiler and c_compiler.compiler_type == "msvc": if "gcc" in opt: i = opt.index("gcc") opt.insert(i + 1, "mingwex") opt.insert(i + 1, "mingw32") c_compiler = self.c_compiler if c_compiler and c_compiler.compiler_type == "msvc": return [] else: pass return opt def get_target(self): try: p = subprocess.Popen( self.compiler_f77 + ['-v'], stdin=subprocess.PIPE, stderr=subprocess.PIPE, ) stdout, stderr = p.communicate() output = (stdout or b"") + (stderr or b"") except (OSError, subprocess.CalledProcessError): pass else: output = filepath_from_subprocess_output(output) m = TARGET_R.search(output) if m: return m.group(1) return "" def _hash_files(self, filenames): h = hashlib.sha1() for fn in filenames: with open(fn, 'rb') as f: while True: block = f.read(131072) if not block: break h.update(block) text = base64.b32encode(h.digest()) text = text.decode('ascii') return text.rstrip('=') def _link_wrapper_lib(self, objects, output_dir, extra_dll_dir, chained_dlls, is_archive): """Create a wrapper shared library for the given objects Return an MSVC-compatible lib """ c_compiler = self.c_compiler if c_compiler.compiler_type != "msvc": raise ValueError("This method only supports MSVC") object_hash = self._hash_files(list(objects) + list(chained_dlls)) if is_win64(): tag = 'win_amd64' else: tag = 'win32' basename = 'lib' + os.path.splitext( os.path.basename(objects[0]))[0][:8] root_name = basename + '.' + object_hash + '.gfortran-' + tag dll_name = root_name + '.dll' def_name = root_name + '.def' lib_name = root_name + '.lib' dll_path = os.path.join(extra_dll_dir, dll_name) def_path = os.path.join(output_dir, def_name) lib_path = os.path.join(output_dir, lib_name) if os.path.isfile(lib_path): # Nothing to do return lib_path, dll_path if is_archive: objects = (["-Wl,--whole-archive"] + list(objects) + ["-Wl,--no-whole-archive"]) self.link_shared_object( objects, dll_name, output_dir=extra_dll_dir, extra_postargs=list(chained_dlls) + [ '-Wl,--allow-multiple-definition', '-Wl,--output-def,' + def_path, '-Wl,--export-all-symbols', '-Wl,--enable-auto-import', '-static', '-mlong-double-64', ]) # No PowerPC! if is_win64(): specifier = '/MACHINE:X64' else: specifier = '/MACHINE:X86' # MSVC specific code lib_args = ['/def:' + def_path, '/OUT:' + lib_path, specifier] if not c_compiler.initialized: c_compiler.initialize() c_compiler.spawn([c_compiler.lib] + lib_args) return lib_path, dll_path def can_ccompiler_link(self, compiler): # MSVC cannot link objects compiled by GNU fortran return compiler.compiler_type not in ("msvc", ) def wrap_unlinkable_objects(self, objects, output_dir, extra_dll_dir): """ Convert a set of object files that are not compatible with the default linker, to a file that is compatible. """ if self.c_compiler.compiler_type == "msvc": # Compile a DLL and return the lib for the DLL as # the object. Also keep track of previous DLLs that # we have compiled so that we can link against them. # If there are .a archives, assume they are self-contained # static libraries, and build separate DLLs for each archives = [] plain_objects = [] for obj in objects: if obj.lower().endswith('.a'): archives.append(obj) else: plain_objects.append(obj) chained_libs = [] chained_dlls = [] for archive in archives[::-1]: lib, dll = self._link_wrapper_lib( [archive], output_dir, extra_dll_dir, chained_dlls=chained_dlls, is_archive=True) chained_libs.insert(0, lib) chained_dlls.insert(0, dll) if not plain_objects: return chained_libs lib, dll = self._link_wrapper_lib( plain_objects, output_dir, extra_dll_dir, chained_dlls=chained_dlls, is_archive=False) return [lib] + chained_libs else: raise ValueError("Unsupported C compiler") def _can_target(cmd, arch): """Return true if the architecture supports the -arch flag""" newcmd = cmd[:] fid, filename = tempfile.mkstemp(suffix=".f") os.close(fid) try: d = os.path.dirname(filename) output = os.path.splitext(filename)[0] + ".o" try: newcmd.extend(["-arch", arch, "-c", filename]) p = Popen(newcmd, stderr=STDOUT, stdout=PIPE, cwd=d) p.communicate() return p.returncode == 0 finally: if os.path.exists(output): os.remove(output) finally: os.remove(filename) if __name__ == '__main__': from distutils import log from numpy.distutils import customized_fcompiler log.set_verbosity(2) print(customized_fcompiler('gnu').get_version()) try: print(customized_fcompiler('g95').get_version()) except Exception as e: print(e)
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