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GH-131278: Support building using "computed gotos" for clang-cl on Windows #131279

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zooba merged 9 commits into from
Mar 17, 2025
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GH-131278: Support building using "computed gotos" for clang-cl on Windows #131279

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98de4c1
Add optimizing flag `WITH_COMPUTED_GOTOS` to support such builds using
chris-eibl Mar 15, 2025
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ups - double backticks needed
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Apply suggestions from code review
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remove space before *
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revert :prog:
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apply Steve's suggestion to blurb
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2 changes: 1 addition & 1 deletion Misc/NEWS.d/next/Build/2025-03-15-12-32-56.gh-issue-131278.1nd0mJ.rst
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Add optimizing flag ``WITH_COMPUTED_GOTOS`` to support such builds using
clang-cl on Windows. Patch by Chris Eibl.
:prog:`clang-cl` on Windows. Patch by Chris Eibl.
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17 changes: 12 additions & 5 deletions PCbuild/readme.txt
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Expand Up @@ -312,14 +312,21 @@ for more on this topic.

Optimization flags
------------------
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You can set optimization flags either via
* environment variables, e.g.
set WITH_COMPUTED_GOTOS=true
* or pass them as parameters to `build.bat`, e.g.
build.bat "/p:WITH_COMPUTED_GOTOS=true"
* or put them in `msbuild.rsp` in the `PCbuild` directory, one flag per line

* environment variables, for example:
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set WITH_COMPUTED_GOTOS=true

* or pass them as parameters to `build.bat`, for example:

build.bat "/p:WITH_COMPUTED_GOTOS=true"

* or put them in `msbuild.rsp` in the `PCbuild` directory, one flag per line.

Supported flags are:

* WITH_COMPUTED_GOTOS: build the interpreter using "computed gotos".
Currently only supported by clang-cl.

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