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bpo-28459: Fix _pyio on Cygwin where the msvcrt module is not built #14013

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bpo-28459: Fix _pyio on Cygwin where the msvcrt module is not built #14013

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2206157
bpo-4032: Cygwin: Add .dll.a to UnixCCompiler for searching libraries
ma8ma Oct 27, 2017
b104fc6
bpo-4032: remove blank lines
ma8ma Oct 27, 2017
d361874
bpo-4032: add a news file
ma8ma Oct 27, 2017
07f3c0d
bpo-28459: Fix _pyio on Cygwin where the msvcrt module is not built.
embray Jun 12, 2019
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bpo-4032: Cygwin: Add .dll.a to UnixCCompiler for searching libraries 
Allow the UnixCCompiler.find_library_file to correctly find DLL import
libs (.dll.a).
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@ma8ma @embray
ma8ma authored and embray committed Jun 12, 2019
commit 22061578c5e17c58d4f18716ddc17d8916ebb3b1
7 changes: 4 additions & 3 deletions Lib/distutils/ccompiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -875,9 +875,10 @@ def executable_filename(self, basename, strip_dir=0, output_dir=''):
def library_filename(self, libname, lib_type='static', # or 'shared'
strip_dir=0, output_dir=''):
assert output_dir is not None
if lib_type not in ("static", "shared", "dylib", "xcode_stub"):
raise ValueError(
"'lib_type' must be \"static\", \"shared\", \"dylib\", or \"xcode_stub\"")
if lib_type not in ("static", "shared", "dylib", "xcode_stub",
"implib"):
raise ValueError("'lib_type' must be \"static\", \"shared\", "
"\"dylib\", \"xcode_stub\", or \"implib\"")
fmt = getattr(self, lib_type + "_lib_format")
ext = getattr(self, lib_type + "_lib_extension")

Expand Down
8 changes: 7 additions & 1 deletion Lib/distutils/unixccompiler.py
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Expand Up @@ -77,8 +77,9 @@ class UnixCCompiler(CCompiler):
shared_lib_extension = ".so"
dylib_lib_extension = ".dylib"
xcode_stub_lib_extension = ".tbd"
implib_lib_extension = ".dll.a"
static_lib_format = shared_lib_format = dylib_lib_format = "lib%s%s"
xcode_stub_lib_format = dylib_lib_format
implib_lib_format = xcode_stub_lib_format = dylib_lib_format
if sys.platform == "cygwin":
exe_extension = ".exe"

Expand Down Expand Up @@ -266,6 +267,7 @@ def find_library_file(self, dirs, lib, debug=0):
shared_f = self.library_filename(lib, lib_type='shared')
dylib_f = self.library_filename(lib, lib_type='dylib')
xcode_stub_f = self.library_filename(lib, lib_type='xcode_stub')
implib_f = self.library_filename(lib, lib_type='implib')
static_f = self.library_filename(lib, lib_type='static')

if sys.platform == 'darwin':
Expand Down Expand Up @@ -301,6 +303,7 @@ def find_library_file(self, dirs, lib, debug=0):
dylib = os.path.join(dir, dylib_f)
static = os.path.join(dir, static_f)
xcode_stub = os.path.join(dir, xcode_stub_f)
implib = os.path.join(dir, implib_f)

if sys.platform == 'darwin' and (
dir.startswith('/System/') or (
Expand All @@ -310,6 +313,7 @@ def find_library_file(self, dirs, lib, debug=0):
dylib = os.path.join(sysroot, dir[1:], dylib_f)
static = os.path.join(sysroot, dir[1:], static_f)
xcode_stub = os.path.join(sysroot, dir[1:], xcode_stub_f)
implib = os.path.join(sysroot, dir[1:], implib_f)

# We're second-guessing the linker here, with not much hard
# data to go on: GCC seems to prefer the shared library, so I'm
Expand All @@ -319,6 +323,8 @@ def find_library_file(self, dirs, lib, debug=0):
return dylib
elif os.path.exists(xcode_stub):
return xcode_stub
elif os.path.exists(implib):
return implib
elif os.path.exists(shared):
return shared
elif os.path.exists(static):
Expand Down