Bump version to 3.1.0-rc1. (dmlc#11698)

* Create rc1 release.

* Update pyproject.toml

---------

Co-authored-by: Philip Hyunsu Cho <[email protected]>
Co-authored-by: Hyunsu Cho <[email protected]>

Author: trivialfis

R-package/DESCRIPTION

@@ -1,8 +1,8 @@
 Package: xgboost
 Type: Package
 Title: Extreme Gradient Boosting
-Version: 3.1.0.0
-Date: 2025-03-03
+Version: 3.1.0.1
+Date: 2025-09-26
 Authors@R: c(
   person("Tianqi", "Chen", role = c("aut"),
          email = "[email protected]"),

R-package/configure

@@ -2796,11 +2796,11 @@ if test x$ac_prog_cxx_stdcxx = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CXX option to enable C++11 features" >&5
 printf %s "checking for $CXX option to enable C++11 features... " >&6; }
-if test ${ac_cv_prog_cxx_11+y}
+if test ${ac_cv_prog_cxx_cxx11+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  ac_cv_prog_cxx_11=no
+  ac_cv_prog_cxx_cxx11=no
 ac_save_CXX=$CXX
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -2842,11 +2842,11 @@ if test x$ac_prog_cxx_stdcxx = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CXX option to enable C++98 features" >&5
 printf %s "checking for $CXX option to enable C++98 features... " >&6; }
-if test ${ac_cv_prog_cxx_98+y}
+if test ${ac_cv_prog_cxx_cxx98+y}
 then :
   printf %s "(cached) " >&6
 else $as_nop
-  ac_cv_prog_cxx_98=no
+  ac_cv_prog_cxx_cxx98=no
 ac_save_CXX=$CXX
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */

jvm-packages/pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>ml.dmlc</groupId>
     <artifactId>xgboost-jvm_2.12</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0-RC1</version>
     <packaging>pom</packaging>
     <name>XGBoost JVM Package</name>
     <description>JVM Package for XGBoost</description>

jvm-packages/xgboost4j-example/pom.xml

@@ -6,11 +6,11 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0-RC1</version>
     </parent>
     <name>xgboost4j-example</name>
     <artifactId>xgboost4j-example_2.12</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0-RC1</version>
     <packaging>jar</packaging>
     <build>
         <plugins>

jvm-packages/xgboost4j-flink/pom.xml

@@ -6,12 +6,12 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0-RC1</version>
     </parent>
 
     <name>xgboost4j-flink</name>
     <artifactId>xgboost4j-flink_2.12</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0-RC1</version>
     <properties>
       <flink-ml.version>2.2.0</flink-ml.version>
     </properties>

jvm-packages/xgboost4j-spark-gpu/pom.xml

@@ -6,12 +6,12 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0-RC1</version>
     </parent>
     <name>xgboost4j-spark-gpu</name>
     <groupId>ml.dmlc</groupId>
     <artifactId>xgboost4j-spark-gpu_2.12</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0-RC1</version>
     <description>JVM Package for XGBoost</description>
     <url>https://github.com/dmlc/xgboost/tree/master/jvm-packages</url>
     <licenses>

jvm-packages/xgboost4j-spark/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0-RC1</version>
     </parent>
     <name>xgboost4j-spark</name>
     <artifactId>xgboost4j-spark_2.12</artifactId>

jvm-packages/xgboost4j/pom.xml

@@ -6,11 +6,11 @@
     <parent>
         <groupId>ml.dmlc</groupId>
         <artifactId>xgboost-jvm_2.12</artifactId>
-        <version>3.1.0-SNAPSHOT</version>
+        <version>3.1.0-RC1</version>
     </parent>
     <name>xgboost4j</name>
     <artifactId>xgboost4j_2.12</artifactId>
-    <version>3.1.0-SNAPSHOT</version>
+    <version>3.1.0-RC1</version>
     <packaging>jar</packaging>
 
     <dependencies>

python-package/pyproject.toml

@@ -15,7 +15,7 @@ authors = [
     { name = "Hyunsu Cho", email = "[email protected]" },
     { name = "Jiaming Yuan", email = "[email protected]" }
 ]
-version = "3.1.0-dev"
+version = "3.1.0rc1"
 requires-python = ">=3.10"
 license = { text = "Apache-2.0" }
 classifiers = [
@@ -45,7 +45,7 @@ pandas = ["pandas>=1.2"]
 scikit-learn = ["scikit-learn"]
 dask = ["dask", "pandas", "distributed"]
 plotting = ["graphviz", "matplotlib"]
-pyspark = ["pyspark", "scikit-learn", "cloudpickle"]
+pyspark = ["pyspark>=3.4", "scikit-learn", "cloudpickle"]
 
 [tool.hatch.build.targets.wheel.hooks.custom]
 

python-package/pyproject.toml.in

@@ -14,7 +14,7 @@ authors = [
     { name = "Hyunsu Cho", email = "[email protected]" },
     { name = "Jiaming Yuan", email = "[email protected]" }
 ]
-version = "3.1.0-dev"
+version = "3.1.0rc1"
 requires-python = ">=3.10"
 license = { text = "Apache-2.0" }
 classifiers = [