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from __future__ import division, absolute_import, print_function
import re
import os
import sys
import warnings
import platform
import tempfile
from subprocess import Popen, PIPE, STDOUT
from numpy.distutils.fcompiler import FCompiler
from numpy.distutils.exec_command import exec_command
from numpy.distutils.misc_util import msvc_runtime_library
from numpy.distutils.compat import get_exception
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"
if is_win64():
#_EXTRAFLAGS = ["-fno-leading-underscore"]
_EXTRAFLAGS = []
else:
_EXTRAFLAGS = []
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:]
# 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 disutils handle this
# error checking.
if not target:
# If MACOSX_DEPLOYMENT_TARGET is not set in the environment,
# we try to get it first from the Python Makefile and then we
# fall back to setting it to 10.3 to maximize the set of
# versions we can work with. This is a reasonable default
# even when using the official Python dist and those derived
# from it.
import distutils.sysconfig as sc
g = {}
try:
get_makefile_filename = sc.get_makefile_filename
except AttributeError:
pass # i.e. PyPy
else:
filename = get_makefile_filename()
sc.parse_makefile(filename, g)
target = g.get('MACOSX_DEPLOYMENT_TARGET', '10.3')
os.environ['MACOSX_DEPLOYMENT_TARGET'] = target
if target == '10.3':
s = 'Env. variable MACOSX_DEPLOYMENT_TARGET set to 10.3'
warnings.warn(s, stacklevel=2)
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):
status, output = exec_command(self.compiler_f77 +
['-print-libgcc-file-name'],
use_tee=0)
if not status:
return os.path.dirname(output)
return None
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)
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':
# the following code is not needed (read: breaks) when using MinGW
# in case want to link F77 compiled code with MSVC
opt.append('gcc')
runtime_lib = msvc_runtime_library()
if runtime_lib:
opt.append(runtime_lib)
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 """
from distutils 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):
sep = ',' if sys.platform == 'darwin' else '='
return '-Wl,-rpath%s"%s"' % (sep, 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 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"] + _EXTRAFLAGS,
'compiler_f90' : [None, "-Wall", "-g",
"-fno-second-underscore"] + _EXTRAFLAGS,
'compiler_fix' : [None, "-Wall", "-g","-ffixed-form",
"-fno-second-underscore"] + _EXTRAFLAGS,
'linker_so' : ["<F90>", "-Wall", "-g"],
'archiver' : ["ar", "-cr"],
'ranlib' : ["ranlib"],
'linker_exe' : [None, "-Wall"]
}
module_dir_switch = '-J'
module_include_switch = '-I'
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"]:
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)
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")
# XXX: fix this mess, does not work for mingw
if is_win64():
c_compiler = self.c_compiler
if c_compiler and c_compiler.compiler_type == "msvc":
return []
else:
pass
return opt
def get_target(self):
status, output = exec_command(self.compiler_f77 +
['-v'],
use_tee=0)
if not status:
m = TARGET_R.search(output)
if m:
return m.group(1)
return ""
def get_flags_opt(self):
if is_win64():
return ['-O0']
else:
return GnuFCompiler.get_flags_opt(self)
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)
return False
if __name__ == '__main__':
from distutils import log
log.set_verbosity(2)
compiler = GnuFCompiler()
compiler.customize()
print(compiler.get_version())
try:
compiler = Gnu95FCompiler()
compiler.customize()
print(compiler.get_version())
except Exception:
msg = get_exception()
print(msg)
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