blob: e6902902933a557a1ab26f89ee3473513c87f3eb [file] [log] [blame]
# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
from waflib import Configure, Logs, Utils
def options(opt):
opt.add_option('--debug', '--with-debug', action='store_true', default=False,
help='Compile in debugging mode with minimal optimizations (-O0 or -Og)')
def configure(conf):
conf.start_msg('Checking C++ compiler version')
cxx = conf.env.CXX_NAME # generic name of the compiler
ccver = tuple(int(i) for i in conf.env.CC_VERSION)
ccverstr = '.'.join(conf.env.CC_VERSION)
errmsg = ''
warnmsg = ''
if cxx == 'gcc':
if ccver < (5, 3, 0):
errmsg = ('The version of gcc you are using is too old.\n'
'The minimum supported gcc version is 5.3.0.')
conf.flags = GccFlags()
elif cxx == 'clang':
if ccver < (3, 5, 0):
errmsg = ('The version of clang you are using is too old.\n'
'The minimum supported clang version is 3.5.0.')
conf.flags = ClangFlags()
else:
warnmsg = 'Note: %s compiler is unsupported' % cxx
conf.flags = CompilerFlags()
if errmsg:
conf.end_msg(ccverstr, color='RED')
conf.fatal(errmsg)
elif warnmsg:
conf.end_msg(ccverstr, color='YELLOW')
Logs.warn(warnmsg)
else:
conf.end_msg(ccverstr)
conf.areCustomCxxflagsPresent = (len(conf.env.CXXFLAGS) > 0)
# General flags are always applied (e.g., selecting C++ language standard)
generalFlags = conf.flags.getGeneralFlags(conf)
conf.add_supported_cxxflags(generalFlags['CXXFLAGS'])
conf.add_supported_linkflags(generalFlags['LINKFLAGS'])
conf.env.DEFINES += generalFlags['DEFINES']
@Configure.conf
def check_compiler_flags(conf):
# Debug or optimized CXXFLAGS and LINKFLAGS are applied only if the
# corresponding environment variables are not set.
# DEFINES are always applied.
if conf.options.debug:
extraFlags = conf.flags.getDebugFlags(conf)
if conf.areCustomCxxflagsPresent:
missingFlags = [x for x in extraFlags['CXXFLAGS'] if x not in conf.env.CXXFLAGS]
if missingFlags:
Logs.warn('Selected debug mode, but CXXFLAGS is set to a custom value "%s"'
% ' '.join(conf.env.CXXFLAGS))
Logs.warn('Default flags "%s" will not be used' % ' '.join(missingFlags))
else:
extraFlags = conf.flags.getOptimizedFlags(conf)
if not conf.areCustomCxxflagsPresent:
conf.add_supported_cxxflags(extraFlags['CXXFLAGS'])
conf.add_supported_linkflags(extraFlags['LINKFLAGS'])
conf.env.DEFINES += extraFlags['DEFINES']
@Configure.conf
def add_supported_cxxflags(self, cxxflags):
"""
Check which cxxflags are supported by compiler and add them to env.CXXFLAGS variable
"""
if len(cxxflags) == 0:
return
self.start_msg('Checking supported CXXFLAGS')
supportedFlags = []
for flags in cxxflags:
flags = Utils.to_list(flags)
if self.check_cxx(cxxflags=['-Werror'] + flags, mandatory=False):
supportedFlags += flags
self.end_msg(' '.join(supportedFlags))
self.env.prepend_value('CXXFLAGS', supportedFlags)
@Configure.conf
def add_supported_linkflags(self, linkflags):
"""
Check which linkflags are supported by compiler and add them to env.LINKFLAGS variable
"""
if len(linkflags) == 0:
return
self.start_msg('Checking supported LINKFLAGS')
supportedFlags = []
for flags in linkflags:
flags = Utils.to_list(flags)
if self.check_cxx(linkflags=['-Werror'] + flags, mandatory=False):
supportedFlags += flags
self.end_msg(' '.join(supportedFlags))
self.env.prepend_value('LINKFLAGS', supportedFlags)
class CompilerFlags(object):
def getCompilerVersion(self, conf):
return tuple(int(i) for i in conf.env.CC_VERSION)
def getGeneralFlags(self, conf):
"""Get dict of CXXFLAGS, LINKFLAGS, and DEFINES that are always needed"""
return {'CXXFLAGS': [], 'LINKFLAGS': [], 'DEFINES': []}
def getDebugFlags(self, conf):
"""Get dict of CXXFLAGS, LINKFLAGS, and DEFINES that are needed only in debug mode"""
return {'CXXFLAGS': [], 'LINKFLAGS': [], 'DEFINES': ['_DEBUG']}
def getOptimizedFlags(self, conf):
"""Get dict of CXXFLAGS, LINKFLAGS, and DEFINES that are needed only in optimized mode"""
return {'CXXFLAGS': [], 'LINKFLAGS': [], 'DEFINES': ['NDEBUG']}
class GccBasicFlags(CompilerFlags):
"""
This class defines basic flags that work for both gcc and clang compilers
"""
def getGeneralFlags(self, conf):
flags = super(GccBasicFlags, self).getGeneralFlags(conf)
flags['CXXFLAGS'] += ['-std=c++14']
return flags
def getDebugFlags(self, conf):
flags = super(GccBasicFlags, self).getDebugFlags(conf)
flags['CXXFLAGS'] += ['-O0',
'-Og', # gcc >= 4.8, clang >= 4.0
'-g3',
'-pedantic',
'-Wall',
'-Wextra',
'-Werror',
'-Wnon-virtual-dtor',
'-Wno-error=deprecated-declarations', # Bug #3795
'-Wno-error=maybe-uninitialized', # Bug #1615
'-Wno-unused-parameter',
]
flags['LINKFLAGS'] += ['-fuse-ld=gold', '-Wl,-O1']
return flags
def getOptimizedFlags(self, conf):
flags = super(GccBasicFlags, self).getOptimizedFlags(conf)
flags['CXXFLAGS'] += ['-O2',
'-g',
'-pedantic',
'-Wall',
'-Wextra',
'-Wnon-virtual-dtor',
'-Wno-unused-parameter',
]
flags['LINKFLAGS'] += ['-fuse-ld=gold', '-Wl,-O1']
return flags
class GccFlags(GccBasicFlags):
def getDebugFlags(self, conf):
flags = super(GccFlags, self).getDebugFlags(conf)
flags['CXXFLAGS'] += ['-fdiagnostics-color']
return flags
def getOptimizedFlags(self, conf):
flags = super(GccFlags, self).getOptimizedFlags(conf)
flags['CXXFLAGS'] += ['-fdiagnostics-color']
return flags
class ClangFlags(GccBasicFlags):
def getGeneralFlags(self, conf):
flags = super(ClangFlags, self).getGeneralFlags(conf)
if Utils.unversioned_sys_platform() == 'darwin' and self.getCompilerVersion(conf) >= (9, 0, 0):
# Bug #4296
flags['CXXFLAGS'] += [['-isystem', '/usr/local/include'], # for Homebrew
['-isystem', '/opt/local/include']] # for MacPorts
return flags
def getDebugFlags(self, conf):
flags = super(ClangFlags, self).getDebugFlags(conf)
flags['CXXFLAGS'] += ['-fcolor-diagnostics',
'-Wextra-semi',
'-Wundefined-func-template',
'-Wno-error=deprecated-register',
'-Wno-error=infinite-recursion', # Bug #3358
'-Wno-error=keyword-macro', # Bug #3235
'-Wno-error=unneeded-internal-declaration', # Bug #1588
'-Wno-unused-local-typedef', # Bugs #2657 and #3209
]
version = self.getCompilerVersion(conf)
if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (8, 1, 0)):
flags['CXXFLAGS'] += ['-Wno-unknown-pragmas']
return flags
def getOptimizedFlags(self, conf):
flags = super(ClangFlags, self).getOptimizedFlags(conf)
flags['CXXFLAGS'] += ['-fcolor-diagnostics',
'-Wextra-semi',
'-Wundefined-func-template',
'-Wno-unused-local-typedef', # Bugs #2657 and #3209
]
version = self.getCompilerVersion(conf)
if version < (3, 9, 0) or (Utils.unversioned_sys_platform() == 'darwin' and version < (8, 1, 0)):
flags['CXXFLAGS'] += ['-Wno-unknown-pragmas']
return flags