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import os
import lit.util
import libcxx.util
class CXXCompiler(object):
def __init__(self, path, flags=None, compile_flags=None, link_flags=None,
use_ccache=False):
self.path = path
self.flags = list(flags or [])
self.compile_flags = list(compile_flags or [])
self.link_flags = list(link_flags or [])
self.use_ccache = use_ccache
self.type = None
self.version = None
self._initTypeAndVersion()
def _initTypeAndVersion(self):
# Get compiler type and version
macros = self.dumpMacros()
if macros is None:
return
compiler_type = None
major_ver = minor_ver = patchlevel = None
if '__clang__' in macros.keys():
compiler_type = 'clang'
# Treat apple's llvm fork differently.
if '__apple_build_version__' in macros.keys():
compiler_type = 'apple-clang'
major_ver = macros['__clang_major__']
minor_ver = macros['__clang_minor__']
patchlevel = macros['__clang_patchlevel__']
elif '__GNUC__' in macros.keys():
compiler_type = 'gcc'
major_ver = macros['__GNUC__']
minor_ver = macros['__GNUC_MINOR__']
patchlevel = macros['__GNUC_PATCHLEVEL__']
self.type = compiler_type
self.version = (major_ver, minor_ver, patchlevel)
def _basicCmd(self, source_files, out, is_link=False, input_is_cxx=False):
cmd = []
if self.use_ccache and not is_link:
cmd += ['ccache']
cmd += [self.path]
if out is not None:
cmd += ['-o', out]
if input_is_cxx:
cmd += ['-x', 'c++']
if isinstance(source_files, list):
cmd += source_files
elif isinstance(source_files, str):
cmd += [source_files]
else:
raise TypeError('source_files must be a string or list')
return cmd
def preprocessCmd(self, source_files, out=None, flags=[]):
cmd = self._basicCmd(source_files, out, input_is_cxx=True) + ['-E']
cmd += self.flags + self.compile_flags + flags
return cmd
def compileCmd(self, source_files, out=None, flags=[]):
cmd = self._basicCmd(source_files, out, input_is_cxx=True) + ['-c']
cmd += self.flags + self.compile_flags + flags
return cmd
def linkCmd(self, source_files, out=None, flags=[]):
cmd = self._basicCmd(source_files, out, is_link=True)
cmd += self.flags + self.link_flags + flags
return cmd
def compileLinkCmd(self, source_files, out=None, flags=[]):
cmd = self._basicCmd(source_files, out, is_link=True)
cmd += self.flags + self.compile_flags + self.link_flags + flags
return cmd
def preprocess(self, source_files, out=None, flags=[], env=None, cwd=None):
cmd = self.preprocessCmd(source_files, out, flags)
out, err, rc = lit.util.executeCommand(cmd, env=env, cwd=cwd)
return cmd, out, err, rc
def compile(self, source_files, out=None, flags=[], env=None, cwd=None):
cmd = self.compileCmd(source_files, out, flags)
out, err, rc = lit.util.executeCommand(cmd, env=env, cwd=cwd)
return cmd, out, err, rc
def link(self, source_files, out=None, flags=[], env=None, cwd=None):
cmd = self.linkCmd(source_files, out, flags)
out, err, rc = lit.util.executeCommand(cmd, env=env, cwd=cwd)
return cmd, out, err, rc
def compileLink(self, source_files, out=None, flags=[], env=None,
cwd=None):
cmd = self.compileLinkCmd(source_files, out, flags)
out, err, rc = lit.util.executeCommand(cmd, env=env, cwd=cwd)
return cmd, out, err, rc
def compileLinkTwoSteps(self, source_file, out=None, object_file=None,
flags=[], env=None, cwd=None):
if not isinstance(source_file, str):
raise TypeError('This function only accepts a single input file')
if object_file is None:
# Create, use and delete a temporary object file if none is given.
with_fn = lambda: libcxx.util.guardedTempFilename(suffix='.o')
else:
# Otherwise wrap the filename in a context manager function.
with_fn = lambda: libcxx.util.nullContext(object_file)
with with_fn() as object_file:
cc_cmd, cc_stdout, cc_stderr, rc = self.compile(
source_file, object_file, flags=flags, env=env, cwd=cwd)
if rc != 0:
return cc_cmd, cc_stdout, cc_stderr, rc
link_cmd, link_stdout, link_stderr, rc = self.link(
object_file, out=out, flags=flags, env=env, cwd=cwd)
return (cc_cmd + ['&&'] + link_cmd, cc_stdout + link_stdout,
cc_stderr + link_stderr, rc)
def dumpMacros(self, source_files=None, flags=[], env=None, cwd=None):
if source_files is None:
source_files = os.devnull
flags = ['-dM'] + flags
cmd, out, err, rc = self.preprocess(source_files, flags=flags, env=env,
cwd=cwd)
if rc != 0:
return None
parsed_macros = {}
lines = [l.strip() for l in out.split('\n') if l.strip()]
for l in lines:
assert l.startswith('#define ')
l = l[len('#define '):]
macro, _, value = l.partition(' ')
parsed_macros[macro] = value
return parsed_macros
def getTriple(self):
cmd = [self.path] + self.flags + ['-dumpmachine']
return lit.util.capture(cmd).strip()
def hasCompileFlag(self, flag):
if isinstance(flag, list):
flags = list(flag)
else:
flags = [flag]
# Add -Werror to ensure that an unrecognized flag causes a non-zero
# exit code. -Werror is supported on all known compiler types.
if self.type is not None:
flags += ['-Werror']
cmd, out, err, rc = self.compile(os.devnull, out=os.devnull,
flags=flags)
return rc == 0
def addCompileFlagIfSupported(self, flag):
if isinstance(flag, list):
flags = list(flag)
else:
flags = [flag]
if self.hasCompileFlag(flags):
self.compile_flags += flags
return True
else:
return False
def addWarningFlagIfSupported(self, flag):
"""
addWarningFlagIfSupported - Add a warning flag if the compiler
supports it. Unlike addCompileFlagIfSupported, this function detects
when "-Wno-<warning>" flags are unsupported. If flag is a
"-Wno-<warning>" GCC will not emit an unknown option diagnostic unless
another error is triggered during compilation.
"""
assert isinstance(flag, str)
if not flag.startswith('-Wno-'):
return self.addCompileFlagIfSupported(flag)
flags = ['-Werror', flag]
cmd = self.compileCmd('-', os.devnull, flags)
# Remove '-v' because it will cause the command line invocation
# to be printed as part of the error output.
# TODO(EricWF): Are there other flags we need to worry about?
if '-v' in cmd:
cmd.remove('-v')
out, err, rc = lit.util.executeCommand(cmd, input='#error\n')
assert rc != 0
if flag in err:
return False
self.compile_flags += [flag]
return True
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