Skip to content

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

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 9 commits into from
Mar 17, 2025
Merged

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

Show file tree
Hide file tree
Changes from 3 commits
Commits
Show all changes
9 commits
Select commit Hold shift + click to select a range
98de4c1
Add optimizing flag `WITH_COMPUTED_GOTOS` to support such builds using
chris-eibl Mar 15, 2025
86cb64e
ups - double backticks needed
chris-eibl Mar 15, 2025
3aabeea
Apply suggestions from code review
chris-eibl Mar 15, 2025
ca22c81
remove space before *
chris-eibl Mar 15, 2025
897c527
revert :prog:
chris-eibl Mar 15, 2025
1f5b55f
add whats new
chris-eibl Mar 15, 2025
905d2e4
Revert "add whats new"
chris-eibl Mar 17, 2025
fd3cb86
apply Steve's suggestion to blurb
chris-eibl Mar 17, 2025
59dac20
fix missing newline in blurb
chris-eibl Mar 17, 2025
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Build/2025-03-15-12-32-56.gh-issue-131278.1nd0mJ.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
Add optimizing flag ``WITH_COMPUTED_GOTOS`` to support such builds using
:prog:`clang-cl` on Windows. Patch by Chris Eibl.
1 change: 1 addition & 0 deletions PCbuild/pythoncore.vcxproj
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -107,6 +107,7 @@
<PreprocessorDefinitions Condition="'$(UseJIT)' == 'true'">_Py_JIT;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions Condition="'$(UseTIER2)' != '' and '$(UseTIER2)' != '0'">_Py_TIER2=$(UseTIER2);%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions Condition="'$(UseTailCallInterp)' == 'true'">Py_TAIL_CALL_INTERP=1;%(PreprocessorDefinitions)</PreprocessorDefinitions>
<PreprocessorDefinitions Condition="'$(WITH_COMPUTED_GOTOS)' != ''">HAVE_COMPUTED_GOTOS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
</ClCompile>
<Link>
<AdditionalDependencies>version.lib;ws2_32.lib;pathcch.lib;bcrypt.lib;%(AdditionalDependencies)</AdditionalDependencies>
Expand Down
21 changes: 21 additions & 0 deletions PCbuild/readme.txt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -310,6 +310,27 @@ See
for more on this topic.


Optimization flags
------------------

You can set optimization flags either via

* environment variables, for example:

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.


Static library
--------------

Expand Down
Loading