glibc/conform/conformtest.py
Joseph Myers 0dcbf4c870 Run conform/ tests using newly built libc
Although the conform/ header tests are built using the headers of the
glibc under test, the execution tests from conformtest (a few tests of
the values of macros evaluating to string constants) are linked and
run with system libc, not the newly built libc.

Apart from preventing testing in cross environments, this can be a
problem even for native testing.  Specifically, it can be useful to do
native testing when building with a cross compiler that links with a
libc that is not the system libc; for example, on x86_64, you can test
all three ABIs that way if the kernel support is present, even if the
host OS lacks 32-bit or x32 libraries or they are older than the
libraries in the sysroot used by the compiler used to build glibc.
This works for almost all tests, but not for these conformtest tests.

Arrange for conformtest to link and run test programs similarly to
other tests, with consequent refactoring of various variables in
Makeconfig to allow passing relevant parts of the link-time command
lines down to conformtest.  In general, the parts of the link command
involving $@ or $^ are separated out from the parts that should be
passed to conformtest (the variables passed to conformtest still
involve various variables whose names involve $(@F), but those
variables simply won't be defined for the conformtest makefile rules
and I think their presence there is harmless).

This is also most of the support that would be needed to allow running
those tests of string constants for cross testing when test-wrapper is
defined.  That will also need changes to where conformtest.py puts the
test executables, so it puts them in the main object directory
(expected to be shared with a test system in cross testing) rather
than /tmp (not expected to be shared) as at present.

Tested for x86_64.

(cherry picked from commit f3eef96390)
2021-12-13 09:07:38 +05:30

748 lines
29 KiB
Python

#!/usr/bin/python3
# Check header contents against the given standard.
# Copyright (C) 2018-2021 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
#
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <https://www.gnu.org/licenses/>.
import argparse
import fnmatch
import os.path
import re
import subprocess
import sys
import tempfile
import glibcconform
class CompileSubTest(object):
"""A compilation subtest."""
def __init__(self, name, text):
"""Initialize a CompileSubTest object."""
self.run_early = False
self.name = name
self.text = text
def run(self, header_tests):
"""Run a compilation subtest."""
header_tests.compile_test(self.name, self.text)
class ExecuteSubTest(object):
"""An execution subtest."""
def __init__(self, name, text):
"""Initialize an ExecuteSubTest object."""
self.run_early = False
self.name = name
self.text = text
def run(self, header_tests):
"""Run an execution subtest."""
header_tests.execute_test(self.name, self.text)
class ElementTest(object):
"""Test for an element of a structure or union type."""
def __init__(self, dummy, type_name, member_type, member_name, *rest):
"""Initialize an ElementTest object."""
self.type_name = type_name
self.member_type = member_type
self.member_name = member_name
self.rest = ' '.join(rest)
self.allow_name = self.member_name
def gen_subtests(self):
"""Generate subtests for an ElementTest."""
text = ('%(type_name)s a_%(num)d;\n'
'%(type_name)s b_%(num)d;\n'
'extern void xyzzy_%(num)d '
'(__typeof__ (&b_%(num)d.%(member_name)s), '
'__typeof__ (&a_%(num)d.%(member_name)s), unsigned);\n'
'void foobarbaz_%(num)d (void) {\n'
'xyzzy_%(num)d (&a_%(num)d.%(member_name)s, '
'&b_%(num)d.%(member_name)s, '
'sizeof (a_%(num)d.%(member_name)s));\n'
'}\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of member %s' % self.member_name,
text))
text = ('%(type_name)s a2_%(num)d;\n'
'extern %(member_type)s b2_%(num)d%(rest)s;\n'
'extern __typeof__ (a2_%(num)d.%(member_name)s) b2_%(num)d;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Type of member %s' % self.member_name,
text))
class ConstantTest(object):
"""Test for a macro or constant."""
def __init__(self, symbol_type, symbol, extra1=None, extra2=None,
extra3=None):
"""Initialize a ConstantTest object."""
self.symbol_type = symbol_type
self.symbol = symbol
# A comparison operation may be specified without a type.
if extra2 is not None and extra3 is None:
self.c_type = None
self.op = extra1
self.value = extra2
else:
self.c_type = extra1
self.op = extra2
self.value = extra3
self.allow_name = self.symbol
def gen_subtests(self):
"""Generate subtests for a ConstantTest."""
if 'macro' in self.symbol_type:
text = ('#ifndef %(symbol)s\n'
'# error "Macro %(symbol)s not defined"\n'
'#endif\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of macro %s' % self.symbol,
text))
if 'constant' in self.symbol_type:
text = ('__typeof__ (%(symbol)s) a_%(num)d = %(symbol)s;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of constant %s' % self.symbol,
text))
if self.symbol_type == 'macro-int-constant':
sym_bits_def_neg = ''.join(
'# if %s & (1LL << %d)\n'
'# define conformtest_%d_bit_%d 0LL\n'
'# else\n'
'# define conformtest_%d_bit_%d (1LL << %d)\n'
'# endif\n'
% (self.symbol, i, self.num, i, self.num, i, i)
for i in range(63))
sym_bits_or_neg = '|'.join('conformtest_%d_bit_%d' % (self.num, i)
for i in range(63))
sym_bits_def_pos = ''.join(
'# if %s & (1ULL << %d)\n'
'# define conformtest_%d_bit_%d (1ULL << %d)\n'
'# else\n'
'# define conformtest_%d_bit_%d 0ULL\n'
'# endif\n'
% (self.symbol, i, self.num, i, i, self.num, i)
for i in range(64))
sym_bits_or_pos = '|'.join('conformtest_%d_bit_%d' % (self.num, i)
for i in range(64))
text = ('#if %s < 0\n'
'# define conformtest_%d_negative 1\n'
'%s'
'# define conformtest_%d_value ~(%s)\n'
'#else\n'
'# define conformtest_%d_negative 0\n'
'%s'
'# define conformtest_%d_value (%s)\n'
'#endif\n'
'_Static_assert (((%s < 0) == conformtest_%d_negative) '
'&& (%s == conformtest_%d_value), '
'"value match inside and outside #if");\n'
% (self.symbol, self.num, sym_bits_def_neg, self.num,
sym_bits_or_neg, self.num, sym_bits_def_pos, self.num,
sym_bits_or_pos, self.symbol, self.num, self.symbol,
self.num))
self.subtests.append(CompileSubTest(
'#if usability of symbol %s'% self.symbol,
text))
if self.c_type is not None:
if self.c_type.startswith('promoted:'):
c_type = self.c_type[len('promoted:'):]
text = ('__typeof__ ((%s) 0 + (%s) 0) a2_%d;\n'
% (c_type, c_type, self.num))
else:
text = '__typeof__ ((%s) 0) a2_%d;\n' % (self.c_type, self.num)
text += 'extern __typeof__ (%s) a2_%d;\n' % (self.symbol, self.num)
self.subtests.append(CompileSubTest(
'Type of symbol %s' % self.symbol,
text))
if self.op is not None:
text = ('_Static_assert (%(symbol)s %(op)s %(value)s, '
'"value constraint");\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Value of symbol %s' % self.symbol,
text))
class SymbolTest(object):
"""Test for a symbol (not a compile-time constant)."""
def __init__(self, dummy, symbol, value=None):
"""Initialize a SymbolTest object."""
self.symbol = symbol
self.value = value
self.allow_name = self.symbol
def gen_subtests(self):
"""Generate subtests for a SymbolTest."""
text = ('void foobarbaz_%(num)d (void) {\n'
'__typeof__ (%(symbol)s) a_%(num)d = %(symbol)s;\n'
'}\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of symbol %s' % self.symbol,
text))
if self.value is not None:
text = ('int main (void) { return %(symbol)s != %(symbol)s; }\n'
% vars(self))
self.subtests.append(ExecuteSubTest(
'Value of symbol %s' % self.symbol,
text))
class TypeTest(object):
"""Test for a type name."""
def __init__(self, dummy, type_name):
"""Initialize a TypeTest object."""
self.type_name = type_name
if type_name.startswith('struct '):
self.allow_name = type_name[len('struct '):]
self.maybe_opaque = False
elif type_name.startswith('union '):
self.allow_name = type_name[len('union '):]
self.maybe_opaque = False
else:
self.allow_name = type_name
self.maybe_opaque = True
def gen_subtests(self):
"""Generate subtests for a TypeTest."""
text = ('%s %sa_%d;\n'
% (self.type_name, '*' if self.maybe_opaque else '', self.num))
self.subtests.append(CompileSubTest(
'Availability of type %s' % self.type_name,
text))
class TagTest(object):
"""Test for a tag name."""
def __init__(self, dummy, type_name):
"""Initialize a TagTest object."""
self.type_name = type_name
if type_name.startswith('struct '):
self.allow_name = type_name[len('struct '):]
elif type_name.startswith('union '):
self.allow_name = type_name[len('union '):]
else:
raise ValueError('unexpected kind of tag: %s' % type_name)
def gen_subtests(self):
"""Generate subtests for a TagTest."""
# If the tag is not declared, these function prototypes have
# incompatible types.
text = ('void foo_%(num)d (%(type_name)s *);\n'
'void foo_%(num)d (%(type_name)s *);\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of tag %s' % self.type_name,
text))
class FunctionTest(object):
"""Test for a function."""
def __init__(self, dummy, return_type, function_name, *args):
"""Initialize a FunctionTest object."""
self.function_name_full = function_name
self.args = ' '.join(args)
if function_name.startswith('(*'):
# Function returning a pointer to function.
self.return_type = '%s (*' % return_type
self.function_name = function_name[len('(*'):]
else:
self.return_type = return_type
self.function_name = function_name
self.allow_name = self.function_name
def gen_subtests(self):
"""Generate subtests for a FunctionTest."""
text = ('%(return_type)s (*foobarbaz_%(num)d) %(args)s '
'= %(function_name)s;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of function %s' % self.function_name,
text))
text = ('extern %(return_type)s (*foobarbaz2_%(num)d) %(args)s;\n'
'extern __typeof__ (&%(function_name)s) foobarbaz2_%(num)d;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Type of function %s' % self.function_name,
text))
class VariableTest(object):
"""Test for a variable."""
def __init__(self, dummy, var_type, var_name, *rest):
"""Initialize a VariableTest object."""
self.var_type = var_type
self.var_name = var_name
self.rest = ' '.join(rest)
self.allow_name = var_name
def gen_subtests(self):
"""Generate subtests for a VariableTest."""
text = ('typedef %(var_type)s xyzzy_%(num)d%(rest)s;\n'
'xyzzy_%(num)d *foobarbaz_%(num)d = &%(var_name)s;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of variable %s' % self.var_name,
text))
text = ('extern %(var_type)s %(var_name)s%(rest)s;\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Type of variable %s' % self.var_name,
text))
class MacroFunctionTest(object):
"""Test for a possibly macro-only function."""
def __init__(self, dummy, return_type, function_name, *args):
"""Initialize a MacroFunctionTest object."""
self.return_type = return_type
self.function_name = function_name
self.args = ' '.join(args)
self.allow_name = function_name
def gen_subtests(self):
"""Generate subtests for a MacroFunctionTest."""
text = ('#ifndef %(function_name)s\n'
'%(return_type)s (*foobarbaz_%(num)d) %(args)s '
'= %(function_name)s;\n'
'#endif\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of macro %s' % self.function_name,
text))
text = ('#ifndef %(function_name)s\n'
'extern %(return_type)s (*foobarbaz2_%(num)d) %(args)s;\n'
'extern __typeof__ (&%(function_name)s) foobarbaz2_%(num)d;\n'
'#endif\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Type of macro %s' % self.function_name,
text))
class MacroStrTest(object):
"""Test for a string-valued macro."""
def __init__(self, dummy, macro_name, value):
"""Initialize a MacroStrTest object."""
self.macro_name = macro_name
self.value = value
self.allow_name = macro_name
def gen_subtests(self):
"""Generate subtests for a MacroStrTest."""
text = ('#ifndef %(macro_name)s\n'
'# error "Macro %(macro_name)s not defined"\n'
'#endif\n'
% vars(self))
self.subtests.append(CompileSubTest(
'Availability of macro %s' % self.macro_name,
text))
# We can't include <string.h> here.
text = ('extern int (strcmp)(const char *, const char *);\n'
'int main (void) { return (strcmp) (%(macro_name)s, '
'%(value)s) != 0; }\n'
% vars(self))
self.subtests.append(ExecuteSubTest(
'Value of macro %s' % self.macro_name,
text))
class HeaderTests(object):
"""The set of tests run for a header."""
def __init__(self, header, standard, cc, flags, ldflags, libs,
run_program_prefix, cross, xfail):
"""Initialize a HeaderTests object."""
self.header = header
self.standard = standard
self.cc = cc
self.flags = flags
self.ldflags = ldflags
self.libs = libs
self.run_program_prefix = run_program_prefix
self.cross = cross
self.xfail_str = xfail
self.cflags_namespace = ('%s -fno-builtin %s -D_ISOMAC'
% (flags, glibcconform.CFLAGS[standard]))
# When compiling the conformance test programs, use of
# __attribute__ in headers is disabled because of attributes
# that affect the types of functions as seen by typeof.
self.cflags = "%s '-D__attribute__(x)='" % self.cflags_namespace
self.tests = []
self.allow = set()
self.allow_fnmatch = set()
self.headers_handled = set()
self.num_tests = 0
self.total = 0
self.skipped = 0
self.errors = 0
self.xerrors = 0
def add_allow(self, name, pattern_ok):
"""Add an identifier as an allowed token for this header.
If pattern_ok, fnmatch patterns are OK as well as
identifiers.
"""
if re.fullmatch(r'[A-Za-z_][A-Za-z0-9_]*', name):
self.allow.add(name)
elif pattern_ok:
self.allow_fnmatch.add(name)
else:
raise ValueError('bad identifier: %s' % name)
def check_token(self, bad_tokens, token):
"""Check whether an identifier token is allowed, and record it in
bad_tokens if not.
"""
if token.startswith('_'):
return
if token in glibcconform.KEYWORDS[self.standard]:
return
if token in self.allow:
return
for pattern in self.allow_fnmatch:
if fnmatch.fnmatch(token, pattern):
return
bad_tokens.add(token)
def handle_test_line(self, line, allow):
"""Handle a single line in the test data.
If allow is true, the header is one specified in allow-header
and so tests are marked as allowed for namespace purposes but
otherwise ignored.
"""
orig_line = line
xfail = False
if line.startswith('xfail-'):
xfail = True
line = line[len('xfail-'):]
else:
match = re.match(r'xfail\[(.*?)\]-(.*)', line)
if match:
xfail_cond = match.group(1)
line = match.group(2)
# "xfail[cond]-" or "xfail[cond1|cond2|...]-" means a
# failure of the test is allowed if any of the listed
# conditions are in the --xfail command-line option
# argument.
if self.xfail_str and re.search(r'\b(%s)\b' % xfail_cond,
self.xfail_str):
xfail = True
optional = False
if line.startswith('optional-'):
optional = True
line = line[len('optional-'):]
# Tokens in test data are space-separated, except for {...}
# tokens that may contain spaces.
tokens = []
while line:
match = re.match(r'\{(.*?)\}(.*)', line)
if match:
tokens.append(match.group(1))
line = match.group(2)
else:
match = re.match(r'([^ ]*)(.*)', line)
tokens.append(match.group(1))
line = match.group(2)
line = line.strip()
if tokens[0] == 'allow-header':
if len(tokens) != 2 or xfail or optional:
raise ValueError('bad allow-header line: %s' % orig_line)
if tokens[1] not in self.headers_handled:
self.load_tests(tokens[1], True)
return
if tokens[0] == 'allow':
if len(tokens) != 2 or xfail or optional:
raise ValueError('bad allow line: %s' % orig_line)
self.add_allow(tokens[1], True)
return
test_classes = {'element': ElementTest,
'macro': ConstantTest,
'constant': ConstantTest,
'macro-constant': ConstantTest,
'macro-int-constant': ConstantTest,
'symbol': SymbolTest,
'type': TypeTest,
'tag': TagTest,
'function': FunctionTest,
'variable': VariableTest,
'macro-function': MacroFunctionTest,
'macro-str': MacroStrTest}
test = test_classes[tokens[0]](*tokens)
test.xfail = xfail
test.optional = optional
test.num = self.num_tests
test.subtests = []
self.num_tests += 1
self.add_allow(test.allow_name, False)
if not allow:
test.gen_subtests()
self.tests.append(test)
def load_tests(self, header, allow):
"""Load tests of a header.
If allow is true, the header is one specified in allow-header
and so tests are marked as allowed for namespace purposes but
otherwise ignored.
"""
self.headers_handled.add(header)
header_s = header.replace('/', '_')
temp_file = os.path.join(self.temp_dir, 'header-data-%s' % header_s)
cmd = ('%s -E -D%s -std=c99 -x c data/%s-data > %s'
% (self.cc, self.standard, header, temp_file))
subprocess.check_call(cmd, shell=True)
with open(temp_file, 'r') as tests:
for line in tests:
line = line.strip()
if line == '' or line.startswith('#'):
continue
self.handle_test_line(line, allow)
def note_error(self, name, xfail):
"""Note a failing test."""
if xfail:
print('XFAIL: %s' % name)
self.xerrors += 1
else:
print('FAIL: %s' % name)
self.errors += 1
sys.stdout.flush()
def note_skip(self, name):
"""Note a skipped test."""
print('SKIP: %s' % name)
self.skipped += 1
sys.stdout.flush()
def compile_test(self, name, text):
"""Run a compilation test; return True if it passes."""
self.total += 1
if self.group_ignore:
return False
optional = self.group_optional
self.group_optional = False
if self.group_skip:
self.note_skip(name)
return False
c_file = os.path.join(self.temp_dir, 'test.c')
o_file = os.path.join(self.temp_dir, 'test.o')
with open(c_file, 'w') as c_file_out:
c_file_out.write('#include <%s>\n%s' % (self.header, text))
cmd = ('%s %s -c %s -o %s' % (self.cc, self.cflags, c_file, o_file))
try:
subprocess.check_call(cmd, shell=True)
except subprocess.CalledProcessError:
if optional:
print('MISSING: %s' % name)
sys.stdout.flush()
self.group_ignore = True
else:
self.note_error(name, self.group_xfail)
self.group_skip = True
return False
print('PASS: %s' % name)
sys.stdout.flush()
return True
def execute_test(self, name, text):
"""Run an execution test."""
self.total += 1
if self.group_ignore:
return False
if self.group_skip:
self.note_skip(name)
return
c_file = os.path.join(self.temp_dir, 'test.c')
exe_file = os.path.join(self.temp_dir, 'test')
with open(c_file, 'w') as c_file_out:
c_file_out.write('#include <%s>\n%s' % (self.header, text))
cmd = ('%s %s %s %s %s -o %s' % (self.cc, self.cflags, self.ldflags,
c_file, self.libs, exe_file))
try:
subprocess.check_call(cmd, shell=True)
except subprocess.CalledProcessError:
self.note_error(name, self.group_xfail)
return
if self.cross:
self.note_skip(name)
return
try:
subprocess.check_call('%s %s' % (self.run_program_prefix,
exe_file),
shell=True)
except subprocess.CalledProcessError:
self.note_error(name, self.group_xfail)
return
print('PASS: %s' % name)
sys.stdout.flush()
def check_namespace(self, name):
"""Check the namespace of a header."""
c_file = os.path.join(self.temp_dir, 'namespace.c')
out_file = os.path.join(self.temp_dir, 'namespace-out')
with open(c_file, 'w') as c_file_out:
c_file_out.write('#include <%s>\n' % self.header)
cmd = ('%s %s -E %s -P -Wp,-dN > %s'
% (self.cc, self.cflags_namespace, c_file, out_file))
subprocess.check_call(cmd, shell=True)
bad_tokens = set()
with open(out_file, 'r') as content:
for line in content:
line = line.strip()
if not line:
continue
if re.match(r'# [1-9]', line):
continue
match = re.match(r'#define (.*)', line)
if match:
self.check_token(bad_tokens, match.group(1))
continue
match = re.match(r'#undef (.*)', line)
if match:
bad_tokens.discard(match.group(1))
continue
# Tokenize the line and check identifiers found. The
# handling of strings and character constants does not
# allow for escaped quotes, and hex floats may be
# wrongly split into tokens including identifiers, but
# this is sufficient in practice.
line = re.sub(r'(?:\bL)?(?:"[^"]*"|\'[^\']*\')', '', line)
line = line.strip()
for token in re.split(r'[^A-Za-z0-9_]+', line):
if re.match(r'[A-Za-z_]', token):
self.check_token(bad_tokens, token)
if bad_tokens:
for token in sorted(bad_tokens):
print(' Namespace violation: "%s"' % token)
self.note_error(name, False)
else:
print('PASS: %s' % name)
sys.stdout.flush()
def run(self):
"""Load and run tests of a header."""
with tempfile.TemporaryDirectory() as self.temp_dir:
self.load_tests(self.header, False)
self.group_optional = False
self.group_xfail = False
self.group_ignore = False
self.group_skip = False
available = self.compile_test('Availability of <%s>' % self.header,
'')
if available:
# As an optimization, try running all non-optional,
# non-XFAILed compilation tests in a single execution
# of the compiler.
combined_list = []
for test in self.tests:
if not test.optional and not test.xfail:
for subtest in test.subtests:
if isinstance(subtest, CompileSubTest):
combined_list.append(subtest.text)
subtest.run_early = True
combined_ok = self.compile_test('Combined <%s> test'
% self.header,
'\n'.join(combined_list))
# Now run the other tests, or all tests if the
# combined test failed.
for test in self.tests:
# A test may run more than one subtest. If the
# initial subtest for an optional symbol fails,
# others are not run at all; if the initial
# subtest for an optional symbol succeeds, others
# are run and are not considered optional; if the
# initial subtest for a required symbol fails,
# others are skipped.
self.group_optional = test.optional
self.group_xfail = test.xfail
self.group_ignore = False
self.group_skip = False
for subtest in test.subtests:
if combined_ok and subtest.run_early:
self.total += 1
print('PASSCOMBINED: %s' % subtest.name)
sys.stdout.flush()
else:
subtest.run(self)
namespace_name = 'Namespace of <%s>' % self.header
if available:
self.check_namespace(namespace_name)
else:
self.note_skip(namespace_name)
print('-' * 76)
print(' Total number of tests : %4d' % self.total)
print(' Number of failed tests : %4d' % self.errors)
print(' Number of xfailed tests : %4d' % self.xerrors)
print(' Number of skipped tests : %4d' % self.skipped)
sys.exit(1 if self.errors else 0)
def main():
"""The main entry point."""
parser = argparse.ArgumentParser(description='Check header contents.')
parser.add_argument('--header', metavar='HEADER',
help='name of header')
parser.add_argument('--standard', metavar='STD',
help='standard to use when processing header')
parser.add_argument('--cc', metavar='CC',
help='C compiler to use')
parser.add_argument('--flags', metavar='CFLAGS',
help='Compiler flags to use with CC')
parser.add_argument('--ldflags', metavar='LDFLAGS',
help='Compiler arguments for linking before inputs')
parser.add_argument('--libs', metavar='LIBS',
help='Compiler arguments for linking after inputs')
parser.add_argument('--run-program-prefix', metavar='RUN-PROGRAM-PREFIX',
help='Wrapper for running newly built program')
parser.add_argument('--cross', action='store_true',
help='Do not run compiled test programs')
parser.add_argument('--xfail', metavar='COND',
help='Name of condition for XFAILs')
args = parser.parse_args()
tests = HeaderTests(args.header, args.standard, args.cc, args.flags,
args.ldflags, args.libs, args.run_program_prefix,
args.cross, args.xfail)
tests.run()
if __name__ == '__main__':
main()