# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
# Spack Project Developers. See the top-level COPYRIGHT file for details.
#
# SPDX-License-Identifier: (Apache-2.0 OR MIT)
import os
import platform
import re
import itertools
import shutil
import tempfile
import llnl.util.lang
from llnl.util.filesystem import (
path_contains_subdirectory, paths_containing_libs)
import llnl.util.tty as tty
import spack.error
import spack.spec
import spack.architecture
import spack.util.executable
import spack.compilers
from spack.util.environment import filter_system_paths
__all__ = ['Compiler']
def _verify_executables(*paths):
for path in paths:
if not os.path.isfile(path) and os.access(path, os.X_OK):
raise CompilerAccessError(path)
@llnl.util.lang.memoized
def get_compiler_version_output(compiler_path, version_arg, ignore_errors=()):
"""Invokes the compiler at a given path passing a single
version argument and returns the output.
Args:
compiler_path (path): path of the compiler to be invoked
version_arg (str): the argument used to extract version information
"""
compiler = spack.util.executable.Executable(compiler_path)
output = compiler(
version_arg, output=str, error=str, ignore_errors=ignore_errors)
return output
def tokenize_flags(flags_str):
"""Given a compiler flag specification as a string, this returns a list
where the entries are the flags. For compiler options which set values
using the syntax "-flag value", this function groups flags and their
values together. Any token not preceded by a "-" is considered the
value of a prior flag."""
tokens = flags_str.split()
if not tokens:
return []
flag = tokens[0]
flags = []
for token in tokens[1:]:
if not token.startswith('-'):
flag += ' ' + token
else:
flags.append(flag)
flag = token
flags.append(flag)
return flags
#: regex for parsing linker lines
_LINKER_LINE = re.compile(
r'^( *|.*[/\\])'
r'(link|ld|([^/\\]+-)?ld|collect2)'
r'[^/\\]*( |$)')
#: components of linker lines to ignore
_LINKER_LINE_IGNORE = re.compile(r'(collect2 version|^[A-Za-z0-9_]+=|/ldfe )')
#: regex to match linker search paths
_LINK_DIR_ARG = re.compile(r'^-L(.:)?(?P<dir>[/\\].*)')
#: regex to match linker library path arguments
_LIBPATH_ARG = re.compile(r'^[-/](LIBPATH|libpath):(?P<dir>.*)')
def _parse_link_paths(string):
"""Parse implicit link paths from compiler debug output.
This gives the compiler runtime library paths that we need to add to
the RPATH of generated binaries and libraries. It allows us to
ensure, e.g., that codes load the right libstdc++ for their compiler.
"""
lib_search_paths = False
raw_link_dirs = []
tty.debug('parsing implicit link info')
for line in string.splitlines():
if lib_search_paths:
if line.startswith('\t'):
raw_link_dirs.append(line[1:])
continue
else:
lib_search_paths = False
elif line.startswith('Library search paths:'):
lib_search_paths = True
if not _LINKER_LINE.match(line):
continue
if _LINKER_LINE_IGNORE.match(line):
continue
tty.debug('linker line: %s' % line)
next_arg = False
for arg in line.split():
if arg in ('-L', '-Y'):
next_arg = True
continue
if next_arg:
raw_link_dirs.append(arg)
next_arg = False
continue
link_dir_arg = _LINK_DIR_ARG.match(arg)
if link_dir_arg:
link_dir = link_dir_arg.group('dir')
tty.debug('linkdir: %s' % link_dir)
raw_link_dirs.append(link_dir)
link_dir_arg = _LIBPATH_ARG.match(arg)
if link_dir_arg:
link_dir = link_dir_arg.group('dir')
tty.debug('libpath: %s', link_dir)
raw_link_dirs.append(link_dir)
tty.debug('found raw link dirs: %s' % ', '.join(raw_link_dirs))
implicit_link_dirs = list()
visited = set()
for link_dir in raw_link_dirs:
normalized_path = os.path.abspath(link_dir)
if normalized_path not in visited:
implicit_link_dirs.append(normalized_path)
visited.add(normalized_path)
tty.debug('found link dirs: %s' % ', '.join(implicit_link_dirs))
return implicit_link_dirs
def _parse_non_system_link_dirs(string):
"""Parses link paths out of compiler debug output.
Args:
string (str): compiler debug output as a string
Returns:
(list of str): implicit link paths parsed from the compiler output
"""
link_dirs = _parse_link_paths(string)
# Return set of directories containing needed compiler libs, minus
# system paths. Note that 'filter_system_paths' only checks for an
# exact match, while 'in_system_subdirectory' checks if a path contains
# a system directory as a subdirectory
link_dirs = filter_system_paths(link_dirs)
return list(p for p in link_dirs if not in_system_subdirectory(p))
def in_system_subdirectory(path):
system_dirs = ['/lib/', '/lib64/', '/usr/lib/', '/usr/lib64/',
'/usr/local/lib/', '/usr/local/lib64/']
return any(path_contains_subdirectory(path, x) for x in system_dirs)
class Compiler(object):
"""This class encapsulates a Spack "compiler", which includes C,
C++, and Fortran compilers. Subclasses should implement
support for specific compilers, their possible names, arguments,
and how to identify the particular type of compiler."""
# Subclasses use possible names of C compiler
cc_names = []
# Subclasses use possible names of C++ compiler
cxx_names = []
# Subclasses use possible names of Fortran 77 compiler
f77_names = []
# Subclasses use possible names of Fortran 90 compiler
fc_names = []
# Optional prefix regexes for searching for this type of compiler.
# Prefixes are sometimes used for toolchains, e.g. 'powerpc-bgq-linux-'
prefixes = []
# Optional suffix regexes for searching for this type of compiler.
# Suffixes are used by some frameworks, e.g. macports uses an '-mp-X.Y'
# version suffix for gcc.
suffixes = [r'-.*']
#: Compiler argument that produces version information
version_argument = '-dumpversion'
#: Return values to ignore when invoking the compiler to get its version
ignore_version_errors = ()
#: Regex used to extract version from compiler's output
version_regex = '(.*)'
# These libraries are anticipated to be required by all executables built
# by any compiler
_all_compiler_rpath_libraries = ['libc', 'libc++', 'libstdc++']
# Default flags used by a compiler to set an rpath
@property
def cc_rpath_arg(self):
return '-Wl,-rpath,'
@property
def cxx_rpath_arg(self):
return '-Wl,-rpath,'
@property
def f77_rpath_arg(self):
return '-Wl,-rpath,'
@property
def fc_rpath_arg(self):
return '-Wl,-rpath,'
@property
def linker_arg(self):
"""Flag that need to be used to pass an argument to the linker."""
return '-Wl,'
@property
def disable_new_dtags(self):
if platform.system() == 'Darwin':
return ''
return '--disable-new-dtags'
@property
def enable_new_dtags(self):
if platform.system() == 'Darwin':
return ''
return '--enable-new-dtags'
# Cray PrgEnv name that can be used to load this compiler
PrgEnv = None
# Name of module used to switch versions of this compiler
PrgEnv_compiler = None
def __init__(self, cspec, operating_system, target,
paths, modules=None, alias=None, environment=None,
extra_rpaths=None, enable_implicit_rpaths=None,
**kwargs):
self.spec = cspec
self.operating_system = str(operating_system)
self.target = target
self.modules = modules or []
self.alias = alias
self.extra_rpaths = extra_rpaths
self.enable_implicit_rpaths = enable_implicit_rpaths
def check(exe):
if exe is None:
return None
_verify_executables(exe)
return exe
self.cc = check(paths[0])
self.cxx = check(paths[1])
if len(paths) > 2:
self.f77 = check(paths[2])
if len(paths) == 3:
self.fc = self.f77
else:
self.fc = check(paths[3])
self.environment = environment
self.extra_rpaths = extra_rpaths or []
# Unfortunately have to make sure these params are accepted
# in the same order they are returned by sorted(flags)
# in compilers/__init__.py
self.flags = {}
for flag in spack.spec.FlagMap.valid_compiler_flags():
value = kwargs.get(flag, None)
if value is not None:
self.flags[flag] = tokenize_flags(value)
@property
def version(self):
return self.spec.version
def implicit_rpaths(self):
if self.enable_implicit_rpaths is False:
return []
exe_paths = [
x for x in [self.cc, self.cxx, self.fc, self.f77] if x]
link_dirs = self._get_compiler_link_paths(exe_paths)
all_required_libs = (
list(self.required_libs) + Compiler._all_compiler_rpath_libraries)
return list(paths_containing_libs(link_dirs, all_required_libs))
@property
def required_libs(self):
"""For executables created with this compiler, the compiler libraries
that would be generally required to run it.
"""
# By default every compiler returns the empty list
return []
@classmethod
def _get_compiler_link_paths(cls, paths):
first_compiler = next((c for c in paths if c), None)
if not first_compiler:
return []
if not cls.verbose_flag():
# In this case there is no mechanism to learn what link directories
# are used by the compiler
return []
try:
tmpdir = tempfile.mkdtemp(prefix='spack-implicit-link-info')
fout = os.path.join(tmpdir, 'output')
fin = os.path.join(tmpdir, 'main.c')
with open(fin, 'w+') as csource:
csource.write(
'int main(int argc, char* argv[]) { '
'(void)argc; (void)argv; return 0; }\n')
compiler_exe = spack.util.executable.Executable(first_compiler)
output = str(compiler_exe(cls.verbose_flag(), fin, '-o', fout,
output=str, error=str)) # str for py2
return _parse_non_system_link_dirs(output)
except spack.util.executable.ProcessError as pe:
tty.debug('ProcessError: Command exited with non-zero status: ' +
pe.long_message)
return []
finally:
shutil.rmtree(tmpdir, ignore_errors=True)
@classmethod
def verbose_flag(cls):
"""
This property should be overridden in the compiler subclass if a
verbose flag is available.
If it is not overridden, it is assumed to not be supported.
"""
# This property should be overridden in the compiler subclass if
# OpenMP is supported by that compiler
@property
def openmp_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self, "OpenMP", "openmp_flag")
# This property should be overridden in the compiler subclass if
# C++98 is not the default standard for that compiler
@property
def cxx98_flag(self):
return ""
# This property should be overridden in the compiler subclass if
# C++11 is supported by that compiler
@property
def cxx11_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self,
"the C++11 standard",
"cxx11_flag")
# This property should be overridden in the compiler subclass if
# C++14 is supported by that compiler
@property
def cxx14_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self,
"the C++14 standard",
"cxx14_flag")
# This property should be overridden in the compiler subclass if
# C++17 is supported by that compiler
@property
def cxx17_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self,
"the C++17 standard",
"cxx17_flag")
# This property should be overridden in the compiler subclass if
# C99 is supported by that compiler
@property
def c99_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self,
"the C99 standard",
"c99_flag")
# This property should be overridden in the compiler subclass if
# C11 is supported by that compiler
@property
def c11_flag(self):
# If it is not overridden, assume it is not supported and warn the user
raise UnsupportedCompilerFlag(self,
"the C11 standard",
"c11_flag")
#
# Compiler classes have methods for querying the version of
# specific compiler executables. This is used when discovering compilers.
#
# Compiler *instances* are just data objects, and can only be
# constructed from an actual set of executables.
#
@classmethod
def default_version(cls, cc):
"""Override just this to override all compiler version functions."""
output = get_compiler_version_output(
cc, cls.version_argument, tuple(cls.ignore_version_errors))
return cls.extract_version_from_output(output)
@classmethod
@llnl.util.lang.memoized
def extract_version_from_output(cls, output):
"""Extracts the version from compiler's output."""
match = re.search(cls.version_regex, output)
return match.group(1) if match else 'unknown'
@classmethod
def cc_version(cls, cc):
return cls.default_version(cc)
@classmethod
def cxx_version(cls, cxx):
return cls.default_version(cxx)
@classmethod
def f77_version(cls, f77):
return cls.default_version(f77)
@classmethod
def fc_version(cls, fc):
return cls.default_version(fc)
@classmethod
def search_regexps(cls, language):
# Compile all the regular expressions used for files beforehand.
# This searches for any combination of <prefix><name><suffix>
# defined for the compiler
compiler_names = getattr(cls, '{0}_names'.format(language))
prefixes = [''] + cls.prefixes
suffixes = [''] + cls.suffixes
regexp_fmt = r'^({0}){1}({2})$'
return [
re.compile(regexp_fmt.format(prefix, re.escape(name), suffix))
for prefix, name, suffix in
itertools.product(prefixes, compiler_names, suffixes)
]
def setup_custom_environment(self, pkg, env):
"""Set any environment variables necessary to use the compiler."""
pass
def __repr__(self):
"""Return a string representation of the compiler toolchain."""
return self.__str__()
def __str__(self):
"""Return a string representation of the compiler toolchain."""
return "%s(%s)" % (
self.name, '\n '.join((str(s) for s in (
self.cc, self.cxx, self.f77, self.fc, self.modules,
str(self.operating_system)))))
class CompilerAccessError(spack.error.SpackError):
def __init__(self, path):
super(CompilerAccessError, self).__init__(
"'%s' is not a valid compiler." % path)
class InvalidCompilerError(spack.error.SpackError):
def __init__(self):
super(InvalidCompilerError, self).__init__(
"Compiler has no executables.")
class UnsupportedCompilerFlag(spack.error.SpackError):
def __init__(self, compiler, feature, flag_name, ver_string=None):
super(UnsupportedCompilerFlag, self).__init__(
"{0} ({1}) does not support {2} (as compiler.{3})."
.format(compiler.name,
ver_string if ver_string else compiler.version,
feature,
flag_name),
"If you think it should, please edit the compiler.{0} subclass to"
.format(compiler.name) +
" implement the {0} property and submit a pull request or issue."
.format(flag_name)
)