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import os
import re
import subprocess
from typing import cast, Optional, Sequence, TextIO, Union
from collections.abc import Mapping
from build.project import Project
from .toolchain import AnyToolchain
def __write_cmake_compiler(f: TextIO, language: str, compiler: str) -> None:
s = compiler.split(' ', 1)
if len(s) == 2:
print(f'set(CMAKE_{language}_COMPILER_LAUNCHER {s[0]})', file=f)
compiler = s[1]
print(f'set(CMAKE_{language}_COMPILER {compiler})', file=f)
def __write_cmake_toolchain_file(f: TextIO, toolchain: AnyToolchain) -> None:
if toolchain.is_darwin:
cmake_system_name = 'Darwin'
elif toolchain.is_windows:
cmake_system_name = 'Windows'
else:
cmake_system_name = 'Linux'
f.write(f"""
set(CMAKE_SYSTEM_NAME {cmake_system_name})
set(CMAKE_SYSTEM_PROCESSOR {toolchain.host_triplet.split('-', 1)[0]})
set(CMAKE_C_COMPILER_TARGET {toolchain.host_triplet})
set(CMAKE_CXX_COMPILER_TARGET {toolchain.host_triplet})
set(CMAKE_C_FLAGS_INIT "{toolchain.cflags} {toolchain.cppflags}")
set(CMAKE_CXX_FLAGS_INIT "{toolchain.cxxflags} {toolchain.cppflags}")
""")
__write_cmake_compiler(f, 'C', toolchain.cc)
__write_cmake_compiler(f, 'CXX', toolchain.cxx)
if cmake_system_name == 'Darwin':
# On macOS, cmake forcibly adds an "-isysroot" flag even if
# one is already present in the flags variable; this breaks
# cross-compiling for iOS, and can be worked around by setting
# the CMAKE_OSX_SYSROOT variable
# (https://cmake.org/cmake/help/latest/variable/CMAKE_OSX_SYSROOT.html).
m = re.search(r'-isysroot +(\S+)', toolchain.cflags)
if m:
sysroot = m.group(1)
print(f'set(CMAKE_OSX_SYSROOT {sysroot})', file=f)
# search libraries and headers only in the sysroot, not on
# the build host
f.write(f"""
set(CMAKE_FIND_ROOT_PATH "{toolchain.install_prefix};{sysroot}")
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
""")
elif cmake_system_name == 'Windows':
# search libraries and headers only in the sysroot, not on
# the build host
f.write(f"""
set(CMAKE_FIND_ROOT_PATH "{toolchain.install_prefix}")
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
""")
def configure(toolchain: AnyToolchain, src: str, build: str, args: list[str]=[], env: Optional[Mapping[str, str]]=None) -> None:
cross_args: list[str] = []
if toolchain.is_windows:
cross_args.append('-DCMAKE_RC_COMPILER=' + cast(str, toolchain.windres))
configure = [
'cmake',
src,
'-DCMAKE_INSTALL_PREFIX=' + toolchain.install_prefix,
'-DCMAKE_BUILD_TYPE=release',
'-GNinja',
] + cross_args + args
if toolchain.host_triplet is not None:
# cross-compiling: write a toolchain file
os.makedirs(build, exist_ok=True)
# Several targets need a sysroot to prevent pkg-config from
# looking for libraries on the build host (TODO: fix this
# properly); but we must not do that on Android because the NDK
# has a sysroot already
if not toolchain.is_android and not toolchain.is_darwin:
cross_args.append('-DCMAKE_SYSROOT=' + toolchain.install_prefix)
cmake_toolchain_file = os.path.join(build, 'cmake_toolchain_file')
with open(cmake_toolchain_file, 'w') as f:
__write_cmake_toolchain_file(f, toolchain)
configure.append('-DCMAKE_TOOLCHAIN_FILE=' + cmake_toolchain_file)
if env is None:
env = toolchain.env
else:
env = {**toolchain.env, **env}
print(configure)
subprocess.check_call(configure, env=env, cwd=build)
class CmakeProject(Project):
def __init__(self, url: Union[str, Sequence[str]], md5: str, installed: str,
configure_args: list[str]=[],
windows_configure_args: list[str]=[],
env: Optional[Mapping[str, str]]=None,
**kwargs):
Project.__init__(self, url, md5, installed, **kwargs)
self.configure_args = configure_args
self.windows_configure_args = windows_configure_args
self.env = env
def configure(self, toolchain: AnyToolchain) -> str:
src = self.unpack(toolchain)
build = self.make_build_path(toolchain)
configure_args = self.configure_args
if toolchain.is_windows:
configure_args = configure_args + self.windows_configure_args
configure(toolchain, src, build, configure_args, self.env)
return build
def _build(self, toolchain: AnyToolchain) -> None:
build = self.configure(toolchain)
subprocess.check_call(['ninja', '-v', 'install'],
cwd=build, env=toolchain.env)
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