Use multi-file builds on Windows (#10110)

JukkaL · web-flow · commit 7ab647d91a0d · 2021-02-19T12:15:39.000Z
This may reduce memory use and thus fix the builds.
diff --git a/misc/build_wheel.py b/misc/build_wheel.py
@@ -73,7 +73,7 @@ def create_environ(python_version: str) -> Dict[str, str]:
         'CC=/opt/llvm/bin/clang'
     )
     env['CIBW_ENVIRONMENT_WINDOWS'] = (
-        'MYPY_USE_MYPYC=1 MYPYC_OPT_LEVEL=2 PIP_NO_BUILD_ISOLATION=no'
+        'MYPY_USE_MYPYC=1 MYPYC_OPT_LEVEL=2 MYPYC_MULTI_FILE=1 PIP_NO_BUILD_ISOLATION=no'
     )
 
     # lxml is slow to build wheels for new releases, so allow installing reqs to fail

Original file line number	Diff line number	Diff line change
`@@ -73,7 +73,7 @@ def create_environ(python_version: str) -> Dict[str, str]:`
`73`	`73`	`'CC=/opt/llvm/bin/clang'`
`74`	`74`	`)`
`75`	`75`	`env['CIBW_ENVIRONMENT_WINDOWS'] = (`
`76`		`- 'MYPY_USE_MYPYC=1 MYPYC_OPT_LEVEL=2 PIP_NO_BUILD_ISOLATION=no'`
	`76`	`+ 'MYPY_USE_MYPYC=1 MYPYC_OPT_LEVEL=2 MYPYC_MULTI_FILE=1 PIP_NO_BUILD_ISOLATION=no'`
`77`	`77`	`)`
`78`	`78`
`79`	`79`	`# lxml is slow to build wheels for new releases, so allow installing reqs to fail`