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# -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
import platform
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 (-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 < (7, 4, 0):
errmsg = ('The version of gcc you are using is too old.\n'
'The minimum supported gcc version is 9.3.')
elif ccver < (9, 3, 0):
warnmsg = ('Using a version of gcc older than 9.3 is not '
'officially supported and may result in build failures.')
conf.flags = GccFlags()
elif cxx == 'clang':
if Utils.unversioned_sys_platform() == 'darwin':
if ccver < (10, 0, 0):
errmsg = ('The version of Xcode you are using is too old.\n'
'The minimum supported Xcode version is 12.4.')
elif ccver < (12, 0, 0):
warnmsg = ('Using a version of Xcode older than 12.4 is not '
'officially supported and may result in build failures.')
elif ccver < (7, 0, 0):
errmsg = ('The version of clang you are using is too old.\n'
'The minimum supported clang version is 7.0.')
conf.flags = ClangFlags()
else:
warnmsg = f'{cxx} compiler is unsupported'
conf.flags = CompilerFlags()
if errmsg:
conf.end_msg(ccverstr, color='RED')
conf.fatal(errmsg)
elif warnmsg:
conf.end_msg(ccverstr, color='YELLOW')
Logs.warn('WARNING: ' + 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 the active 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 the active 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:
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': ['BOOST_ASIO_NO_DEPRECATED', 'BOOST_FILESYSTEM_NO_DEPRECATED'],
}
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 GccClangCommonFlags(CompilerFlags):
"""
This class defines common flags that work for both gcc and clang compilers.
"""
def getGeneralFlags(self, conf):
flags = super().getGeneralFlags(conf)
flags['CXXFLAGS'] += ['-std=c++17']
if Utils.unversioned_sys_platform() != 'darwin':
flags['LINKFLAGS'] += ['-fuse-ld=lld']
return flags
__cxxFlags = [
'-fdiagnostics-color',
'-Wall',
'-Wextra',
'-Wpedantic',
'-Wenum-conversion',
'-Wextra-semi',
'-Wnon-virtual-dtor',
'-Wno-unused-parameter',
]
__linkFlags = ['-Wl,-O1']
def getDebugFlags(self, conf):
flags = super().getDebugFlags(conf)
flags['CXXFLAGS'] += ['-Og', '-g'] + self.__cxxFlags + [
'-Werror',
'-Wno-error=deprecated-declarations', # Bug #3795
'-Wno-error=maybe-uninitialized', # Bug #1615
]
flags['LINKFLAGS'] += self.__linkFlags
return flags
def getOptimizedFlags(self, conf):
flags = super().getOptimizedFlags(conf)
flags['CXXFLAGS'] += ['-O2', '-g1'] + self.__cxxFlags
flags['LINKFLAGS'] += self.__linkFlags
return flags
class GccFlags(GccClangCommonFlags):
__cxxFlags = [
'-Wcatch-value=2',
'-Wcomma-subscript', # enabled by default in C++20
'-Wduplicated-branches',
'-Wduplicated-cond',
'-Wlogical-op',
'-Wredundant-tags',
'-Wvolatile', # enabled by default in C++20
]
def getDebugFlags(self, conf):
flags = super().getDebugFlags(conf)
flags['CXXFLAGS'] += self.__cxxFlags
if platform.machine() == 'armv7l':
flags['CXXFLAGS'] += ['-Wno-psabi'] # Bug #5106
return flags
def getOptimizedFlags(self, conf):
flags = super().getOptimizedFlags(conf)
flags['CXXFLAGS'] += self.__cxxFlags
if platform.machine() == 'armv7l':
flags['CXXFLAGS'] += ['-Wno-psabi'] # Bug #5106
return flags
class ClangFlags(GccClangCommonFlags):
def getGeneralFlags(self, conf):
flags = super().getGeneralFlags(conf)
if Utils.unversioned_sys_platform() == 'darwin':
# Bug #4296
brewdir = '/opt/homebrew' if platform.machine() == 'arm64' else '/usr/local'
flags['CXXFLAGS'] += [
['-isystem', f'{brewdir}/include'], # for Homebrew
['-isystem', '/opt/local/include'], # for MacPorts
]
elif Utils.unversioned_sys_platform() == 'freebsd':
# Bug #4790
flags['CXXFLAGS'] += [['-isystem', '/usr/local/include']]
return flags
__cxxFlags = [
'-Wundefined-func-template',
'-Wno-unused-local-typedef', # Bugs #2657 and #3209
]
def getDebugFlags(self, conf):
flags = super().getDebugFlags(conf)
flags['CXXFLAGS'] += self.__cxxFlags
return flags
def getOptimizedFlags(self, conf):
flags = super().getOptimizedFlags(conf)
flags['CXXFLAGS'] += self.__cxxFlags
return flags