Python 3.15.0b3

README.anaconda.md

@@ -7,9 +7,8 @@ plan that you should follow.
 
 **On each supported platform do the following:**
 
-1. Push your newly built python package to our testing channel (`c3i_test2`).
-2. Create a new Conda environment using this new python version: `conda create -n test -c c3i_test2 python=VERSION`
-3. Make sure interactive python works, and can import some built in modules (`re`, `math`, `os`):
+1. Create a new Conda environment using this new python version: `conda create -n test python=VERSION`
+2. Make sure interactive python works, and can import some built in modules (`re`, `math`, `os`):
 ```
 $ python -i
 Python 3.8.8 (default, Apr 13 2021, 12:59:45)
@@ -18,5 +17,5 @@ Type "help", "copyright", "credits" or "license" for more information.
 >>> import re
 >>>
 ```
-4. Make sure that the standard http server doesn't throw errors: `python -m http.server --bind 127.0.0.1`
-5. `conda-build` a python dependent package with this version of python. Good examples are `pyarrow` or `scipy`.
+3. Make sure that the standard http server doesn't throw errors: `python -m http.server --bind 127.0.0.1`
+4. `conda-build` a python dependent package with this version of python. Good examples are `pyarrow` or `scipy`.

abs.yaml

@@ -4,3 +4,7 @@ build_parameters:
   #- "--skip-existing"
   - "--error-overlinking"
   - "--error-overdepending"
+
+# Upload all testing artifacts on a labeled testing channel: ad-testing/label/py315
+upload_channels:
+- ad-testing/label/py315

recipe/build_base.bat

@@ -1,6 +1,9 @@
 setlocal EnableDelayedExpansion
 echo on
 
+:: Avoids fetching nuget.exe from the internet.
+set PYTHON=%CONDA_PYTHON_EXE%
+
 :: Compile python, extensions and external libraries
 if "%ARCH%"=="64" (
    set PLATFORM=x64
@@ -48,6 +51,16 @@ if "%PY_GIL_DISABLED%" == "yes" (
   set "FREETHREADING=--disable-gil"
   set "THREAD=t"
   set "EXE_T=%VER%t"
+  :: Free-threaded MSBuild output goes to PCbuild\amd64t\ (or win32t\), not amd64\.
+  :: Upstream python.props sets BuildPath=BuildPath64t when DisableGil=true; all
+  :: exes, .pyd, and .lib artifacts land there.  BUILD_PATH below is used to
+  :: stage those files into %PREFIX% — leaving it at amd64 makes xcopy *.pyd fail
+  :: with "File not found" even though the compile itself succeeded.
+  if "%ARCH%"=="64" (
+    set BUILD_PATH=amd64t
+  ) else (
+    set BUILD_PATH=win32t
+  )
 ) else (
   set "FREETHREADING=--experimental-jit-off"
   set "THREAD="
@@ -57,11 +70,18 @@ if "%PY_GIL_DISABLED%" == "yes" (
 :: AP doesn't support PGO atm?
 set PGO=
 
+:: TODO: remove once tk 9 is available on main
+:: Pin Tcl/Tk from the `tk` variant in conda_build_config.yaml (single source of
+:: truth, shared with build_base.sh). Upstream 3.15 tcltk.props defaults
+:: TclVersion to 9.0.3.0, but pkgs/main only ships tk 8.6; MSBuild derives the
+:: lib names (tcl86t.lib/tk86t.lib) from the major.minor of these props.
+set TCLTK_MSBUILD_PROPS="/p:TclVersion=%tk%" "/p:TkVersion=%tk%"
+
 cd PCbuild
 
 :: Twice because:
 :: error : importlib_zipimport.h updated. You will need to rebuild pythoncore to see the changes.
-call build.bat %PGO% %CONFIG% %FREETHREADING% -m -e -v -p %PLATFORM%
+call build.bat %PGO% %CONFIG% %FREETHREADING% -m -e -v -p %PLATFORM% %TCLTK_MSBUILD_PROPS%
 if errorlevel 1 exit 1
 cd ..
 

recipe/build_base.sh

@@ -254,7 +254,7 @@ _common_configure_args+=(--with-computed-gotos)
 _common_configure_args+=(--with-system-expat)
 _common_configure_args+=(--enable-loadable-sqlite-extensions)
 _common_configure_args+=(--with-tcltk-includes="-I${PREFIX}/include")
-_common_configure_args+=("--with-tcltk-libs=-L${PREFIX}/lib -ltcl8.6 -ltk8.6")
+_common_configure_args+=("--with-tcltk-libs=-L${PREFIX}/lib -ltcl${TCLTK_VER} -ltk${TCLTK_VER}")
 _common_configure_args+=(--with-platlibdir=lib)
 _common_configure_args+=(--with-system-libmpdec=yes)
 
@@ -416,10 +416,11 @@ if [[ -f ${PREFIX}/bin/python${VER}m ]]; then
 fi
 ln -s ${PREFIX}/bin/python${VER} ${PREFIX}/bin/python
 ln -s ${PREFIX}/bin/pydoc${VER} ${PREFIX}/bin/pydoc
+# TODO: It's still relevant for python 3.10. Consider removing this once we drop 3.10.
 # Workaround for https://github.com/conda/conda/issues/10969 -
 # specifically for conda<=4.10
 # https://github.com/conda/conda/issues/11423#issuecomment-1104253815
-ln -s ${PREFIX}/bin/python3.14 ${PREFIX}/bin/python3.1
+ln -s ${PREFIX}/bin/python${VER} ${PREFIX}/bin/python3.1
 
 # Remove test data to save space
 # Though keep `support` as some things use that.
@@ -480,7 +481,7 @@ pushd "${PREFIX}"/lib/python${VERABI}
   # Remove osx sysroot as it depends on the build machine
   sed -i.bak "s@-isysroot @@g" sysconfigfile
   # make sure $CONDA_BUILD_SYSROOT is not empty ...
-  if [[ ${HOST} =~ .*darwin.* ]] && [[ -n ${CONDA_BUILD_SYSROOT} ]]; then 
+  if [[ ${HOST} =~ .*darwin.* ]] && [[ -n ${CONDA_BUILD_SYSROOT} ]]; then
     sed -i.bak "s@$CONDA_BUILD_SYSROOT @@g" sysconfigfile
   fi
   # Remove unfilled config option

recipe/conda_build_config.yaml

@@ -1,10 +1,20 @@
 python:
-  - 3.14
+  - 3.15
 python_impl:
   - cpython
 numpy:
-  - 2.3
+  - 2.5
 gil_type:
   - normal
   # Will be enabled as part of https://anaconda.atlassian.net/browse/PKG-5855
-  - disabled # [not (s390x or (osx and x86_64))]
+  - disabled
+
+# TODO: Windows tail-calling interpreter: 64-bit builds with Visual Studio 2026 (MSVC 18) can now use the tail-call interpreter (reported ~15–20% speedup).
+# Official python.org Windows binaries now use it.
+# We should consider adding vs2026 and use it for later builds.
+# c_compiler:                   # [win]
+#   - vs2026                    # [win]
+# c_stdlib_version:             # [win]
+#   - 2026.1                    # [win]
+# cxx_compiler:                 # [win]
+#   - vs2026                    # [win]

recipe/meta.yaml

@@ -1,5 +1,5 @@
-{% set version = "3.14.6" %}
-{% set dev = "" %}
+{% set version = "3.15.0" %}
+{% set dev = "b3" %}
 {% set dev_ = "" %}
 {% set ver2 = '.'.join(version.split('.')[0:2]) %}
 {% set ver2nd = ''.join(version.split('.')[0:2]) %}
@@ -61,7 +61,7 @@ source:
 {% else %}
   - url: https://www.python.org/ftp/python/{{ version }}/Python-{{ version }}{{ dev }}.tar.xz
     # md5 from: https://www.python.org/downloads/release/python-{{ ver3nd }}/
-    sha256: 143b1dddefaec3bd2e21e3b839b34a2b7fb9842272883c576420d605e9f30c63
+    sha256: 6a935ae234a67e6549894373b0cfeb8361182d03b21442328ae9598ab7422127
 {% endif %}
     patches:
       - patches/0001-Win32-Change-FD_SETSIZE-from-512-to-2048.patch
@@ -93,6 +93,7 @@ source:
       - patches/0023-branding.patch
       - patches/0024-Unvendor-zlib-ng.patch
       - patches/0025-Unvendor-zstd.patch
+      - patches/0026-xxlimited-freethreading-stable-abi-link.patch  # [win]
 
 build:
   number: {{ build_number }}
@@ -193,10 +194,10 @@ outputs:
 {% endif %}
         # https://github.com/python/cpython/blob/main/Tools/jit/README.md#installing-llvm:
         # "LLVM version 21 is the officially supported version"
-        - clang-19         # [not win]
-        - llvm-tools-19    # [not win]
-        - clang 19.*       # [win]
-        - llvm-tools 19.*  # [win]
+        - clang-21         # [not win]
+        - llvm-tools-21    # [not win]
+        - clang 21.*       # [win]
+        - llvm-tools 21.*  # [win]
       host:
         - bzip2 {{ bzip2 }}
         - sqlite {{ sqlite }}
@@ -312,6 +313,8 @@ outputs:
     script: build_static.bat  # [win]
     build:
       number: {{ build_number }}
+      force_use_keys:
+        - gil_type
       activate_in_script: true
       ignore_run_exports:
         - python_abi

recipe/patches/0001-Win32-Change-FD_SETSIZE-from-512-to-2048.patch

@@ -1,4 +1,4 @@
-From 285d30e99ac555177c551c112798cc79720f676e Mon Sep 17 00:00:00 2001
+From f43869001705b6d14f777f1bdb7a6d53dd4edd96 Mon Sep 17 00:00:00 2001
 From: Ray Donnelly <mingw.android@gmail.com>
 Date: Wed, 16 Aug 2017 11:53:55 +0100
 Subject: [PATCH 01/24] Win32: Change FD_SETSIZE from 512 to 2048
@@ -9,10 +9,10 @@ https://github.com/ContinuumIO/anaconda-issues/issues/1241
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/Modules/selectmodule.c b/Modules/selectmodule.c
-index d234d504cb5..3856307c611 100644
+index 2c56dbc6a54..845ff4732ca 100644
 --- a/Modules/selectmodule.c
 +++ b/Modules/selectmodule.c
-@@ -44,7 +44,7 @@
+@@ -45,7 +45,7 @@
     FD_SETSIZE higher before this; e.g., via compiler /D switch.
  */
  #if defined(MS_WINDOWS) && !defined(FD_SETSIZE)
@@ -22,5 +22,5 @@ index d234d504cb5..3856307c611 100644
 
  #if defined(HAVE_POLL_H)
 -- 
-2.50.1 (Apple Git-155)
+2.51.0
 

recipe/patches/0002-Win32-Do-not-download-externals.patch

@@ -1,4 +1,4 @@
-From 2e62556e56120f7b6d15ba97fdf8733deebb9ea9 Mon Sep 17 00:00:00 2001
+From 1faa47b5f8c0ca3aa98ee0e3bb317106458bd514 Mon Sep 17 00:00:00 2001
 From: Ray Donnelly <mingw.android@gmail.com>
 Date: Thu, 7 Sep 2017 11:35:47 +0100
 Subject: [PATCH 02/24] Win32: Do not download externals
@@ -8,18 +8,18 @@ Subject: [PATCH 02/24] Win32: Do not download externals
  1 file changed, 1 insertion(+), 1 deletion(-)
 
 diff --git a/PCbuild/build.bat b/PCbuild/build.bat
-index 60235704886..867a352057f 100644
+index 9d2f032f5a9..f0629639913 100644
 --- a/PCbuild/build.bat
 +++ b/PCbuild/build.bat
-@@ -113,7 +113,7 @@ if "%IncludeSSL%"=="" set IncludeSSL=true
+@@ -118,7 +118,7 @@ if "%IncludeSSL%"=="" set IncludeSSL=true
  if "%IncludeTkinter%"=="" set IncludeTkinter=true
  if "%UseJIT%" NEQ "true" set IncludeLLVM=false
 
 -if "%IncludeExternals%"=="true" call "%dir%get_externals.bat"
 +rem if "%IncludeExternals%"=="true" call "%dir%get_externals.bat"
 
- if "%do_pgo%" EQU "true" if "%platf%" EQU "x64" (
-     if "%PROCESSOR_ARCHITEW6432%" NEQ "AMD64" if "%PROCESSOR_ARCHITECTURE%" NEQ "AMD64" (
+ if /I "%target%"=="Clean" set clean=true
+ if /I "%target%"=="CleanAll" set clean=true
 -- 
-2.50.1 (Apple Git-155)
+2.51.0
 

recipe/patches/0003-Fix-find_library-so-that-it-looks-in-sys.prefix-lib-.patch

@@ -1,4 +1,4 @@
-From c48a3c1cc321e00bd361f5fce271a18c03c4a202 Mon Sep 17 00:00:00 2001
+From 054ec3e5926c29850db8d0cae3aaebc2670bfccb Mon Sep 17 00:00:00 2001
 From: Ray Donnelly <mingw.android@gmail.com>
 Date: Tue, 5 Dec 2017 22:47:59 +0000
 Subject: [PATCH 03/24] Fix find_library so that it looks in sys.prefix/lib
@@ -25,10 +25,10 @@ index 583c47daff3..ab9b01c87e2 100644
          yield os.path.join(executable_path, name[len('@executable_path/'):])
 
 diff --git a/Lib/ctypes/util.py b/Lib/ctypes/util.py
-index 378f12167c6..bf45580ab9f 100644
+index 35ac5b6bfd6..09c3e1703dc 100644
 --- a/Lib/ctypes/util.py
 +++ b/Lib/ctypes/util.py
-@@ -129,7 +129,8 @@ def dllist():
+@@ -136,7 +136,8 @@ def dllist():
  elif os.name == "posix" and sys.platform in {"darwin", "ios", "tvos", "watchos"}:
      from ctypes.macholib.dyld import dyld_find as _dyld_find
      def find_library(name):
@@ -38,7 +38,7 @@ index 378f12167c6..bf45580ab9f 100644
                      '%s.dylib' % name,
                      '%s.framework/%s' % (name, name)]
          for name in possible:
-@@ -430,10 +431,30 @@ def _findLib_ld(name):
+@@ -437,10 +438,30 @@ def _findLib_ld(name):
                  pass  # result will be None
              return result
 
@@ -72,5 +72,5 @@ index 378f12167c6..bf45580ab9f 100644
 
  # Listing loaded libraries on other systems will try to use
 -- 
-2.50.1 (Apple Git-155)
+2.51.0
 

recipe/patches/0004-Disable-registry-lookup-unless-CONDA_PY_ALLOW_REG_PA.patch

@@ -1,4 +1,4 @@
-From 4435da9460f82ce6c96c4b92f58eab6edfc90da1 Mon Sep 17 00:00:00 2001
+From 41b486c6f4a3028836368f79711da6f5934f9386 Mon Sep 17 00:00:00 2001
 From: Ray Donnelly <mingw.android@gmail.com>
 Date: Sat, 27 Oct 2018 18:48:30 +0100
 Subject: [PATCH 04/24] Disable registry lookup unless CONDA_PY_ALLOW_REG_PATHS
@@ -25,7 +25,7 @@ index 1e75993480a..ff96c8e1990 100644
          !progname_to_dict(dict, "real_executable") ||
          !library_to_dict(dict, "library") ||
 diff --git a/Modules/getpath.py b/Modules/getpath.py
-index b89d7427e3f..21df0efac12 100644
+index 6199567bd77..ea370c2f686 100644
 --- a/Modules/getpath.py
 +++ b/Modules/getpath.py
 @@ -52,6 +52,7 @@
@@ -36,9 +36,9 @@ index b89d7427e3f..21df0efac12 100644
 
  # ** Values calculated at runtime **
  # config            -- [in/out] dict of the PyConfig structure
-@@ -704,7 +705,7 @@ def search_up(prefix, *landmarks, test=isfile):
-     else:
-         pythonpath.append(joinpath(base_prefix, ZIP_LANDMARK))
+@@ -699,7 +700,7 @@ def search_up(prefix, *landmarks, test=isfile):
+         stdlib_zip = joinpath(base_prefix, ZIP_LANDMARK)
+     pythonpath.append(stdlib_zip)
 
 -    if os_name == 'nt' and use_environment and winreg:
 +    if os_name == 'nt' and use_environment and winreg and ENV_CONDA_PY_ALLOW_REG_PATHS and ENV_CONDA_PY_ALLOW_REG_PATHS != '0':
@@ -1197,5 +1197,5 @@ index 00000000000..a73ea8a0e91
 +    return hPython3 != NULL;
 +}
 -- 
-2.50.1 (Apple Git-155)
+2.51.0