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diff --git a/project/boost/toolchain.py b/project/boost/toolchain.py
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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.
+
+R'''Compiler detection.
+
+It is assumed that Boost.Build is good enough to detect both GCC on Linux and
+MSVC on Windows. From that point on, it's just a matter of setting the correct
+address-model= value.
+
+But I also frequently use MinGW-w64, and the most convinient way to use it that
+I know is making a "user config" and passing it to b2 using the --user-config
+parameter.
+'''
+
+import abc
+from contextlib import contextmanager
+import logging
+import tempfile
+
+import project.os
+
+
+class Toolchain(abc.ABC):
+ def __init__(self, platform):
+ self.platform = platform
+
+ @abc.abstractmethod
+ def get_b2_args(self):
+ pass
+
+
+class NativeToolchain(Toolchain):
+ def get_b2_args(self):
+ return [f'address-model={self.platform.get_address_model()}']
+
+
+class MingwToolchain(Toolchain):
+ TAG = 'custom'
+
+ def __init__(self, platform, config_path):
+ super().__init__(platform)
+ self.config_path = config_path
+
+ def get_b2_args(self):
+ return [f'--user-config={self.config_path}', f'toolset=gcc-{MingwToolchain.TAG}']
+
+
+def _native_toolchain(platform):
+ return NativeToolchain(platform)
+
+
+def _get_mingw_prefix(platform):
+ target_arch = platform.get_address_model()
+ if target_arch == 32:
+ return 'i686'
+ if target_arch == 64:
+ return 'x86_64'
+ raise RuntimeError(f'unexpected address model: {target_arch}')
+
+
+def _get_mingw_path(platform):
+ prefix = _get_mingw_prefix(platform)
+ ext = ''
+ if project.os.on_windows_like():
+ # Boost.Build wants the .exe extension at the end on Cygwin.
+ ext = '.exe'
+ path = f'{prefix}-w64-mingw32-g++{ext}'
+ return path
+
+
+def _format_user_config(tag, compiler, **kwargs):
+ features = (f'<{k}>{v}' for k, v in kwargs.items())
+ features = ' '.join(features)
+ return f'using gcc : {tag} : {compiler} : {features} ;'
+
+
+def _format_mingw_user_config(platform):
+ compiler = _get_mingw_path(platform)
+ features = {
+ 'target-os': 'windows',
+ 'address-model': platform.get_address_model(),
+ }
+ return _format_user_config(MingwToolchain.TAG, compiler, **features)
+
+
+@contextmanager
+def _mingw_toolchain(platform):
+ tmp = tempfile.NamedTemporaryFile(mode='w', prefix='mingw_w64_', suffix='.jam')
+ with tmp as file:
+ config = _format_mingw_user_config(platform)
+ logging.info('Using user config:\n%s', config)
+ file.write(config)
+ file.flush()
+ try:
+ yield MingwToolchain(platform, file.name)
+ finally:
+ logging.info('Removing temporary user config file')
+
+
+@contextmanager
+def detect_toolchain(platform, mingw=False):
+ if mingw:
+ with _mingw_toolchain(platform) as toolchain:
+ yield toolchain
+ else:
+ yield _native_toolchain(platform)