8000 Use a 64-bit C compiler on Windows to build wheels by JukkaL · Pull Request #10097 · python/mypy · GitHub
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Use a 64-bit C compiler on Windows to build wheels #10097

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Feb 16, 2021
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Use a 64-bit C compiler on Windows to build wheels #10097

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Use a 64-bit C compiler on Windows to build wheels 
This will hopefully fix out of memory errors.

Work on #10074.
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@JukkaL
JukkaL committed Feb 16, 2021
commit e7217d62036cfe5cb34ab9fa90b093749789c3b4
22 changes: 16 additions & 6 deletions misc/build_wheel.py
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Expand Up @@ -32,6 +32,12 @@
# Clang package we use on Linux
LLVM_URL = 'https://github.com/mypyc/mypy_mypyc-wheels/releases/download/llvm/llvm-centos-5.tar.gz'

# Script to configure 64-bit MSVC compiler executable
VCVARS64 = (
r'C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise' +
r'\VC\Auxiliary\Build\vcvars64.bat'
)

# Mypy repository root
ROOT_DIR = os.path.dirname(os.path.dirname(__file__))

Expand All @@ -53,18 +59,22 @@ def create_environ(python_version: str) -> Dict[str, str]:
#
# TODO: remove use of mypy-requirements.txt once we no longer need to support
# building pre modular typeshed releases
env['CIBW_BEFORE_BUILD'] = """
install_deps = """
pip install -r {package}/mypy-requirements.txt &&
(pip install -r {package}/build-requirements.txt || true)
""".replace('\n', ' ')
env['CIBW_BEFORE_BUILD'] = install_deps

# download a copy of clang to use to compile on linux. this was probably built in 2018,
# speeds up compilation 2x
env['CIBW_BEFORE_BUILD_LINUX'] = """
(cd / && curl -L %s | tar xzf -) &&
pip install -r {package}/mypy-requirements.txt &&
(pip install -r {package}/build-requirements.txt || true)
""".replace('\n', ' ') % LLVM_URL
env['CIBW_BEFORE_BUILD_LINUX'] = (
"(cd / && curl -L %s | tar xzf -) && %s" % (LLVM_URL, install_deps)
)

# IMPORTANT: The build can run out of memory if we don't use a 64-bit compiler on Windows.
env['CIBW_BEFORE_BUILD_WINDOWS'] = (
'call "%s" && %s' % (VCVARS64, install_deps)
)

# the double negative is counterintuitive, https://github.com/pypa/pip/issues/5735
env['CIBW_ENVIRONMENT'] = 'MYPY_USE_MYPYC=1 MYPYC_OPT_LEVEL=3 PIP_NO_BUILD_ISOLATION=no'
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