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gh-127405: Remove dead code in sysconfig._get_pybuilddir() #131935

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gh-127405: Remove dead code in sysconfig._get_pybuilddir() #131935

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a7099b9
Fix `get_config_var('Py_DEBUG')` usage in `sysconfig._get_pybuilddir()`
XuehaiPan Mar 31, 2025
700ffee
Merge branch 'main' into fix-py-debug-sysconfig
XuehaiPan Mar 31, 2025
2cf16e6
Remove a branch that always false
XuehaiPan Mar 31, 2025
fcb5c17
📜🤖 Added by blurb_it.
blurb-it[bot] Mar 31, 2025
25ae994
Fix non-exist reference target in news
XuehaiPan Mar 31, 2025
78f13d4
Merge branch 'main' into fix-py-debug-sysconfig
XuehaiPan Mar 31, 2025
1bd31c4
Revert back to pre GH-127430
XuehaiPan Apr 1, 2025
3652252
Merge branch 'main' into fix-py-debug-sysconfig
XuehaiPan Apr 1, 2025
15e9149
Try to fix `sysconfig._get_pybuilddir()`
XuehaiPan Apr 1, 2025
01a8f94
Try fix WASM build with Py_DEBUG
XuehaiPan Apr 1, 2025
047d5e4
Try fix WASM build with Py_DEBUG
XuehaiPan Apr 1, 2025
949fd46
Add `/Lib` to PYTHONPATH
XuehaiPan Apr 1, 2025
cb04312
Try fix WASM build with Py_DEBUG
XuehaiPan Apr 1, 2025
1a6b81b
Try fix WASM build with Py_DEBUG
XuehaiPan Apr 1, 2025
bc0c675
Revert "Try fix WASM build with Py_DEBUG"
XuehaiPan Apr 1, 2025
a5af5c8
Try increase stack size
XuehaiPan Apr 1, 2025
732ea14
Try increase stack size
XuehaiPan Apr 1, 2025
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2 changes: 1 addition & 1 deletion Lib/sysconfig/__main__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -162,7 +162,7 @@ def _print_config_dict(d, stream):

def _get_pybuilddir():
pybuilddir = f'build/lib.{get_platform()}-{get_python_version()}'
if get_config_var('Py_DEBUG') == '1':
if get_config_var('Py_DEBUG'):
pybuilddir += '-pydebug'
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I don't see any way for this to be called, but I note that this behavior is tied to

cpython/Tools/wasm/wasi.py

Line 216 in e9556e1

pydebug = lib_dir.endswith("-pydebug")

I think this aspect of the WASM build is broken, and if this code can be deleted then perhaps that trail can too.

return pybuilddir

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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2025-03-31-17-15-09.gh-issue-127405.E7lPpD.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Remove dead code in function ``sysconfig._get_pybuilddir``. Patch by Xuehai Pan.
2 changes: 1 addition & 1 deletion Tools/wasm/wasi.py
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Original file line number Diff line number Diff line change
Expand Up @@ -296,7 +296,7 @@ def main():
# Make sure the stack size will work for a pydebug
# build.
# Use 16 MiB stack.
"--wasm max-wasm-stack=16777216 "
"--wasm max-wasm-stack=33554432 "
# Enable thread support; causes use of preview1.
#"--wasm threads=y --wasi threads=y "
# Map the checkout to / to load the stdlib from /Lib.
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11 changes: 9 additions & 2 deletions Tools/wasm/wasm_build.py
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Original file line number Diff line number Diff line change
Expand Up @@ -329,10 +329,17 @@ def _check_wasi() -> None:
# workaround for https://github.com/python/cpython/issues/95952
"HOSTRUNNER": (
"wasmtime run "
"--wasm max-wasm-stack=16777216 "
"--wasm max-wasm-stack=33554432 "
"--wasi preview2 "
"--dir {srcdir}::/ "
"--env PYTHONPATH=/{relbuilddir}/build/lib.wasi-wasm32-{version}:/Lib"
"--env PYTHONPATH="
+ ":".join(
(
"/{relbuilddir}/build/lib.wasi-wasm32-{version}-pydebug",
"/{relbuilddir}/build/lib.wasi-wasm32-{version}",
"/Lib",
)
)
),
"PATH": [WASI_SDK_PATH / "bin", os.environ["PATH"]],
},
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5 changes: 2 additions & 3 deletions configure
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4 changes: 2 additions & 2 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -1638,7 +1638,7 @@ then
dnl TODO: support other WASI runtimes
dnl wasmtime starts the process with "/" as CWD. For OOT builds add the
dnl directory containing _sysconfigdata to PYTHONPATH.
[WASI], [HOSTRUNNER='wasmtime run --wasm max-wasm-stack=16777216 --wasi preview2=n --env PYTHONPATH=/$(shell realpath --relative-to $(abs_srcdir) $(abs_builddir))/$(shell cat pybuilddir.txt):/Lib --dir $(srcdir)::/'],
[WASI], [HOSTRUNNER='wasmtime run --wasm max-wasm-stack=33554432 --wasi preview2=n --env PYTHONPATH=/$(shell realpath --relative-to $(abs_srcdir) $(abs_builddir))/$(shell cat pybuilddir.txt):/Lib --dir $(srcdir)::/'],
[HOSTRUNNER='']
)
fi
Expand Down Expand Up @@ -2420,7 +2420,7 @@ AS_CASE([$ac_sys_system],
dnl gh-117645: Set the memory size to 40 MiB, the stack size to 16 MiB,
dnl and move the stack first.
dnl https://github.com/WebAssembly/wasi-libc/issues/233
AS_VAR_APPEND([LDFLAGS_NODIST], [" -z stack-size=16777216 -Wl,--stack-first -Wl,--initial-memory=41943040"])
AS_VAR_APPEND([LDFLAGS_NODIST], [" -z stack-size=33554432 -Wl,--stack-first -Wl,--initial-memory=41943040"])
]
)

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