WIP: Dummy PR to check maint-26.0.0 status

.env

@@ -98,6 +98,6 @@ VCPKG="9b965a116838c6cdcd36bca60d1b81b030c8ab8d"    # 2026.05.27 (not release, u
 # ci/docker/python-*-windows-*.dockerfile or the vcpkg config.
 # This is a workaround for our CI problem that "archery docker build" doesn't
 # use pulled built images in dev/tasks/python-wheels/github.windows.yml.
-PYTHON_WHEEL_WINDOWS_IMAGE_REVISION=2026-09-09
+PYTHON_WHEEL_WINDOWS_IMAGE_REVISION=2026-10-01
 PYTHON_WHEEL_WINDOWS_TEST_IMAGE_REVISION=2026-09-14
 

c_glib/meson.build

@@ -32,7 +32,7 @@ project(
     #   * 22.04: 0.61.2
     #   * 24.04: 1.3.2
     meson_version: '>=0.61.2',
-    version: '26.0.0-SNAPSHOT',
+    version: '26.0.0',
 )
 
 version = meson.project_version()

c_glib/vcpkg.json

@@ -1,6 +1,6 @@
 {
   "name": "arrow-glib",
-  "version-string": "26.0.0-SNAPSHOT",
+  "version-string": "26.0.0",
   "$comment:dependencies": "We can enable gobject-introspection again once it's updated",
   "dependencies": [
     "glib",

ci/scripts/PKGBUILD

@@ -18,7 +18,7 @@
 _realname=arrow
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=25.0.1.9000
+pkgver=26.0.0
 pkgrel=8000
 pkgdesc="Apache Arrow is a cross-language development platform for in-memory data (mingw-w64)"
 arch=("any")

ci/vcpkg/ports.patch

@@ -80,3 +80,37 @@ index 278bc17a1c..d47d859360 100644
  )
  file(GLOB modules "${SOURCE_PATH}/cmake_modules/Find*.cmake")
  file(REMOVE ${modules} "${SOURCE_PATH}/c++/libs/libhdfspp/libhdfspp.tar.gz")
+diff --git a/ports/uriparser/fix-glibc-2.28-reallocarray.diff b/ports/uriparser/fix-glibc-2.28-reallocarray.diff
+new file mode 100644
+index 0000000..57adef4
+--- /dev/null
++++ b/ports/uriparser/fix-glibc-2.28-reallocarray.diff
+@@ -0,0 +1,15 @@
++diff --git a/src/UriMemory.c b/src/UriMemory.c
++--- a/src/UriMemory.c
+++++ b/src/UriMemory.c
++@@ -50,6 +50,11 @@
++ #    define _DEFAULT_SOURCE 1
++ #  endif
++ 
+++// For glibc <2.29
+++#  if !defined(_GNU_SOURCE)
+++#    define _GNU_SOURCE 1
+++#  endif
+++
++ // For NetBSD (stdlib.h revision 1.122 of 2020-05-26)
++ #  if defined(__NetBSD__) && !defined(_OPENBSD_SOURCE)
++ #    define _OPENBSD_SOURCE 1
+diff --git a/ports/uriparser/portfile.cmake b/ports/uriparser/portfile.cmake
+index 5df5e94..225e5fb 100644
+--- a/ports/uriparser/portfile.cmake
++++ b/ports/uriparser/portfile.cmake
+@@ -4,6 +4,8 @@ vcpkg_from_github(
+     REF "uriparser-${VERSION}"
+     SHA512 1e4c397418e71e705b5712de2dc3ea6e95163c9d95bfbaa5f7d2fd2344d34eaf167d7d9389ab9671cfb314af026621b56e632ea34b681c2f4d7951a1b32a98b4
+     HEAD_REF master
++    PATCHES
++        fix-glibc-2.28-reallocarray.diff
+ )
+
+ if("tool" IN_LIST FEATURES)

cpp/CMakeLists.txt

@@ -96,7 +96,7 @@ if(POLICY CMP0170)
   cmake_policy(SET CMP0170 NEW)
 endif()
 
-set(ARROW_VERSION "26.0.0-SNAPSHOT")
+set(ARROW_VERSION "26.0.0")
 
 string(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+" ARROW_BASE_VERSION "${ARROW_VERSION}")
 

cpp/examples/minimal_build/system_dependency.dockerfile

@@ -34,6 +34,7 @@ RUN apt-get update -y -q && \
       libre2-dev \
       libsnappy-dev \
       libthrift-dev \
+      liburiparser-dev \
       libutf8proc-dev \
       libzstd-dev \
       pkg-config \

cpp/meson.build

@@ -19,7 +19,7 @@ project(
     'arrow',
     'cpp',
     'c',
-    version: '26.0.0-SNAPSHOT',
+    version: '26.0.0',
     license: 'Apache-2.0',
     meson_version: '>=1.3.0',
     default_options: ['c_std=c11', 'warning_level=2', 'cpp_std=c++20'],

cpp/src/arrow/util/async_generator_test.cc

@@ -976,6 +976,9 @@ TEST_F(MergedGeneratorErrorHookTest, OuterErrorToWaiterNotOvertakenByLaterPull)
 // receives the error has completed, even when it is requested while the generator is
 // already completing.
 TEST_F(MergedGeneratorErrorHookTest, InnerErrorToWaiterNotOvertakenDuringCompletion) {
+#ifndef ARROW_ENABLE_THREADING
+  GTEST_SKIP() << "Test requires threading support";
+#endif
   auto failing = Future<TestInt>::Make();
   AsyncGenerator<TestInt> failing_sub = [failing]() { return failing; };
   std::vector<AsyncGenerator<TestInt>> subs = {failing_sub};
@@ -994,6 +997,9 @@ TEST_F(MergedGeneratorErrorHookTest, InnerErrorToWaiterNotOvertakenDuringComplet
 }
 
 TEST_F(MergedGeneratorErrorHookTest, OuterErrorToWaiterNotOvertakenDuringCompletion) {
+#ifndef ARROW_ENABLE_THREADING
+  GTEST_SKIP() << "Test requires threading support";
+#endif
   auto failing = Future<AsyncGenerator<TestInt>>::Make();
   AsyncGenerator<AsyncGenerator<TestInt>> source = [failing]() { return failing; };
   MergedGenerator<TestInt> gen(std::move(source), 1);
@@ -1011,6 +1017,9 @@ TEST_F(MergedGeneratorErrorHookTest, OuterErrorToWaiterNotOvertakenDuringComplet
 }
 
 TEST_F(MergedGeneratorErrorHookTest, ClaimedErrorNotOvertakenDuringCompletion) {
+#ifndef ARROW_ENABLE_THREADING
+  GTEST_SKIP() << "Test requires threading support";
+#endif
   auto failing = Future<TestInt>::Make();
   AsyncGenerator<TestInt> failing_sub = [failing]() { return failing; };
   std::vector<AsyncGenerator<TestInt>> subs = {MakeVectorGenerator<TestInt>({TestInt(1)}),