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Title: Check early whether tail-calling is possible for MSVC builds on Windows · Issue #148047 · python/cpython · GitHub

Open Graph Title: Check early whether tail-calling is possible for MSVC builds on Windows · Issue #148047 · python/cpython

X Title: Check early whether tail-calling is possible for MSVC builds on Windows · Issue #148047 · python/cpython

Description: Rather than failing late when compiling e.g. a debug configuration build.bat -c debug --tail-call-interp with hundreds of error C4737: Unable to perform required tail call. Performance may be degraded. lets fail early with an explicit er...

Open Graph Description: Rather than failing late when compiling e.g. a debug configuration build.bat -c debug --tail-call-interp with hundreds of error C4737: Unable to perform required tail call. Performance may be degra...

X Description: Rather than failing late when compiling e.g. a debug configuration build.bat -c debug --tail-call-interp with hundreds of error C4737: Unable to perform required tail call. Performance may be degra...

Opengraph URL: https://github.com/python/cpython/issues/148047

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Hey, it has json ld scripts: 
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Check early whether tail-calling is possible for MSVC builds on Windowshttps://github.com/python/cpython/issues/148047#top
OS-windowshttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22OS-windows%22
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https://github.com/chris-eibl
chris-eiblhttps://github.com/chris-eibl
on Apr 3, 2026https://github.com/python/cpython/issues/148047#issue-4201628283
#140513https://github.com/python/cpython/issues/140513
#140548https://github.com/python/cpython/pull/140548
GH-148047: Check early whether tail-calling is possible for MSVC builds on Windows #148036https://github.com/python/cpython/pull/148036
gh-148047: Revert "GH-148047: Check early whether tail-calling is possible for MSVC builds on Windows (#148036)" #148558https://github.com/python/cpython/pull/148558
OS-windowshttps://github.com/python/cpython/issues?q=state%3Aopen%20label%3A%22OS-windows%22
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