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# Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "cmake-common" project.
# For details, see https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.
import argparse
from enum import Enum
import os.path
import platform
from project.os import on_windows
class Platform(Enum):
# I only build for x86(-64), so here it goes.
X86 = 'x86'
X64 = 'x64'
# 'auto' means that no additional arguments will be passed to either
# Boost's b2 nor CMake (except on Windows, see below).
AUTO = 'auto'
def __str__(self):
return str(self.value)
@staticmethod
def windows_native():
# On Windows, no explicit platform would mean x64 for VS 2019 and x86
# for VS 2017. To account for this discrepancy, it is assumed that
# Windows builds can only target either x86 or x64 (which I don't think
# is true?), and we default to x64 most of the time.
#
# Source: https://stackoverflow.com/a/12578715/514684
if platform.machine().endswith('64'):
return Platform.X64
return Platform.X86
@staticmethod
def all():
return Platform.X86, Platform.X64,
@staticmethod
def parse(s):
try:
if s == 'Win32':
# Visual Studio/AppVeyor convention:
return Platform.X86
return Platform(s)
except ValueError as e:
raise argparse.ArgumentTypeError(f'invalid platform: {s}') from e
def mingw_prefix(self):
if self is Platform.AUTO:
if on_windows():
# On Windows, use the host architecture.
return Platform.windows_native().mingw_prefix()
# On Linux, assume that the target is x64.
return Platform.X64.mingw_prefix()
if self is Platform.X86:
return 'i686'
if self is Platform.X64:
return 'x86_64'
raise NotImplementedError(f'unsupported platform: {self}')
def address_model(self):
'''Maps to Boost's address-model.'''
if self is Platform.AUTO:
if on_windows():
# On Windows, use the host architecture.
return Platform.windows_native().address_model()
# On Linux, assume that the target is x64.
raise RuntimeError('cannot determine address model unless the target platform is specified explicitly')
if self is Platform.X86:
return 32
if self is Platform.X64:
return 64
raise NotImplementedError(f'unsupported platform: {self}')
def stagedir(self, configuration):
'''Path to the built libraries inside the Boost build directory.'''
if self is Platform.AUTO:
if on_windows():
# On Windows, use the host architecture.
return Platform.windows_native().stagedir(configuration)
# On Linux, the libraries are stored in stage/auto/CONFIGURATION/lib.
return os.path.join('stage', str(self), str(configuration))
def boost_librarydir(self, configuration):
'''Same as above, but for CMake; adds /lib/ at the end.'''
return os.path.join(self.stagedir(configuration), 'lib')
def b2_address_model(self):
if self is Platform.AUTO and not on_windows():
# On Linux, don't specify the architecture explicitly (it is
# assumed that the host architecture will be targeted).
return []
return [f'address-model={self.address_model()}']
def b2_stagedir(self, configuration):
return [f'--stagedir={self.stagedir(configuration)}']
def b2_args(self, configuration):
args = []
args += self.b2_address_model()
args += self.b2_stagedir(configuration)
return args
def cmake_toolset_file(self):
# For Makefile generators, we make a special toolset file that
# specifies the -m32/-m64 flags, etc.
if self is Platform.AUTO:
# Let the compiler decide.
return ''
if self is Platform.X86:
address_model = 32
elif self is Platform.X64:
address_model = 64
else:
raise NotImplementedError(f'unsupported platform: {self}')
return f'''
set(CMAKE_C_FLAGS -m{address_model})
set(CMAKE_CXX_FLAGS -m{address_model})
'''
def msvc_arch(self):
'''Maps to CMake's -A argument for MSVC.'''
if self is Platform.AUTO:
if on_windows():
# On Windows, use the host architecture.
return Platform.windows_native().msvc_arch()
# I don't think the -A argument is supported on any generators
# except the Visual Studio ones.
raise RuntimeError('-A parameter is only supported for Visual Studio generators')
if self is Platform.X86:
return 'Win32'
if self is Platform.X64:
return 'x64'
raise NotImplementedError(f'unsupported platform: {self}')
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