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"""SCons.Tool.gcc
Tool-specific initialization for gcc.
There normally shouldn't be any need to import this module directly.
It will usually be imported through the generic SCons.Tool.Tool()
selection method.
"""
#
# Copyright (c) 2001 - 2019 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "src/engine/SCons/Tool/gcc.py 103260fce95bf5db1c35fb2371983087d85dd611 2019-07-13 18:25:30 bdbaddog"
from . import cc
import os
import re
import subprocess
import SCons.Util
compilers = ['gcc', 'cc']
def generate(env):
"""Add Builders and construction variables for gcc to an Environment."""
if 'CC' not in env:
env['CC'] = env.Detect(compilers) or compilers[0]
cc.generate(env)
if env['PLATFORM'] in ['cygwin', 'win32']:
env['SHCCFLAGS'] = SCons.Util.CLVar('$CCFLAGS')
else:
env['SHCCFLAGS'] = SCons.Util.CLVar('$CCFLAGS -fPIC')
# determine compiler version
version = detect_version(env, env['CC'])
if version:
env['CCVERSION'] = version
def exists(env):
# is executable, and is a GNU compiler (or accepts '--version' at least)
return detect_version(env, env.Detect(env.get('CC', compilers)))
def detect_version(env, cc):
"""Return the version of the GNU compiler, or None if it is not a GNU compiler."""
version = None
cc = env.subst(cc)
if not cc:
return version
# -dumpversion was added in GCC 3.0. As long as we're supporting
# GCC versions older than that, we should use --version and a
# regular expression.
# pipe = SCons.Action._subproc(env, SCons.Util.CLVar(cc) + ['-dumpversion'],
pipe = SCons.Action._subproc(env, SCons.Util.CLVar(cc) + ['--version'],
stdin='devnull',
stderr='devnull',
stdout=subprocess.PIPE)
if pipe.wait() != 0:
return version
with pipe.stdout:
# -dumpversion variant:
# line = pipe.stdout.read().strip()
# --version variant:
line = SCons.Util.to_str(pipe.stdout.readline())
# Non-GNU compiler's output (like AIX xlc's) may exceed the stdout buffer:
# So continue with reading to let the child process actually terminate.
while SCons.Util.to_str(pipe.stdout.readline()):
pass
# -dumpversion variant:
# if line:
# version = line
# --version variant:
match = re.search(r'[0-9]+(\.[0-9]+)+', line)
if match:
version = match.group(0)
return version
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
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