[cmake] [c++] require CMake 3.18+ (#6260)

CMakeLists.txt

@@ -27,17 +27,7 @@ if(APPLE)
   option(APPLE_OUTPUT_DYLIB "Output dylib shared library" OFF)
 endif()
 
-if(__INTEGRATE_OPENCL)
-  cmake_minimum_required(VERSION 3.11)
-elseif(USE_SWIG)
-  cmake_minimum_required(VERSION 3.8)
-elseif(USE_GPU OR APPLE)
-  cmake_minimum_required(VERSION 3.2)
-elseif(USE_CUDA)
-  cmake_minimum_required(VERSION 3.16)
-else()
-  cmake_minimum_required(VERSION 3.0)
-endif()
+cmake_minimum_required(VERSION 3.18)
 
 project(lightgbm LANGUAGES C CXX)
 
@@ -85,7 +75,6 @@ elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "8.1.0")
     message(FATAL_ERROR "Insufficient AppleClang version")
   endif()
-  cmake_minimum_required(VERSION 3.16)
 elseif(MSVC)
   if(MSVC_VERSION LESS 1900)
     message(
@@ -93,7 +82,6 @@ elseif(MSVC)
       "The compiler ${CMAKE_CXX_COMPILER} doesn't support required C++11 features. Please use a newer MSVC."
     )
   endif()
-  cmake_minimum_required(VERSION 3.8)
 endif()
 
 if(USE_SWIG)

docs/GPU-Windows.rst

@@ -279,7 +279,7 @@ Installing CMake requires one download first and then a lot of configuration for
    :target: ./_static/images/screenshot-downloading-cmake.png
    :alt: A screenshot of the binary distributions of C Make for downloading on 64 bit Windows.
 
--  Download `CMake`_ (3.8 or higher)
+-  Download `CMake`_
 
 -  Install CMake
 

docs/Installation-Guide.rst

@@ -69,7 +69,7 @@ The ``.exe`` file will be in ``LightGBM-master/windows/x64/Release`` folder.
 From Command Line
 *****************
 
-1. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
+1. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
 
 2. Run the following commands:
 
@@ -167,7 +167,7 @@ Install Using ``Homebrew``
 Build from GitHub
 *****************
 
-1. Install `CMake`_ (3.16 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -193,7 +193,7 @@ Build from GitHub
 gcc
 ^^^
 
-1. Install `CMake`_ (3.2 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -266,7 +266,7 @@ The ``.exe`` file will be in ``LightGBM-master/windows/x64/Release`` folder.
 From Command Line
 -----------------
 
-1. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
+1. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
 
 2. Run the following commands:
 
@@ -331,7 +331,7 @@ Apple Clang
 
 Only **Apple Clang** version 8.1 or higher is supported.
 
-1. Install `CMake`_ (3.16 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -351,7 +351,7 @@ Only **Apple Clang** version 8.1 or higher is supported.
 gcc
 ***
 
-1. Install `CMake`_ (3.2 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -414,7 +414,7 @@ From Command Line
 
 1. You need to install `MS MPI`_ first. Both ``msmpisdk.msi`` and ``msmpisetup.exe`` are needed.
 
-2. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
+2. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
 
 3. Run the following commands:
 
@@ -465,7 +465,7 @@ Apple Clang
 
 Only **Apple Clang** version 8.1 or higher is supported.
 
-1. Install `CMake`_ (3.16 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -497,7 +497,7 @@ Only **Apple Clang** version 8.1 or higher is supported.
 gcc
 ***
 
-1. Install `CMake`_ (3.2 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -547,7 +547,7 @@ The following dependencies should be installed before compilation:
 
    The following Debian packages should provide necessary Boost libraries: ``libboost-dev``, ``libboost-system-dev``, ``libboost-filesystem-dev``.
 
--  **CMake** 3.2 or later.
+-  **CMake**
 
 To build LightGBM GPU version, run the following commands:
 
@@ -575,7 +575,7 @@ If you use **MinGW**, the build procedure is similar to the build on Linux. Refe
 
 Following procedure is for the **MSVC** (Microsoft Visual C++) build.
 
-1. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is installed).
+1. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is installed).
 
 2. Install **OpenCL** for Windows. The installation depends on the brand (NVIDIA, AMD, Intel) of your GPU card.
 
@@ -637,7 +637,7 @@ The following dependencies should be installed before compilation:
 
 -  **CUDA** 11.0 or later libraries. Please refer to `this detailed guide`_. Pay great attention to the minimum required versions of host compilers listed in the table from that guide and use only recommended versions of compilers.
 
--  **CMake** 3.16 or later.
+-  **CMake**
 
 To build LightGBM CUDA version, run the following commands:
 
@@ -700,7 +700,7 @@ On Windows a Java wrapper of LightGBM can be built using **Java**, **SWIG**, **C
 VS Build Tools
 **************
 
-1. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
+1. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
 
 2. Install `SWIG`_ and **Java** (also make sure that ``JAVA_HOME`` is set properly).
 
@@ -779,7 +779,7 @@ Apple Clang
 
 Only **Apple Clang** version 8.1 or higher is supported.
 
-1. Install `CMake`_ (3.16 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -805,7 +805,7 @@ Only **Apple Clang** version 8.1 or higher is supported.
 gcc
 ***
 
-1. Install `CMake`_ (3.2 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -839,7 +839,7 @@ Windows
 
 On Windows, C++ unit tests of LightGBM can be built using **CMake** and **VS Build Tools**.
 
-1. Install `Git for Windows`_, `CMake`_ (3.8 or higher) and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
+1. Install `Git for Windows`_, `CMake`_ and `VS Build Tools`_ (**VS Build Tools** is not needed if **Visual Studio** (2015 or newer) is already installed).
 
 2. Run the following commands:
 
@@ -884,7 +884,7 @@ Apple Clang
 
 Only **Apple Clang** version 8.1 or higher is supported.
 
-1. Install `CMake`_ (3.16 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 
@@ -904,7 +904,7 @@ Only **Apple Clang** version 8.1 or higher is supported.
 gcc
 ***
 
-1. Install `CMake`_ (3.2 or higher):
+1. Install `CMake`_ :
 
    .. code:: sh
 

python-package/pyproject.toml

@@ -63,7 +63,7 @@ build-backend = "scikit_build_core.build"
 # based on https://github.com/scikit-build/scikit-build-core#configuration
 [tool.scikit-build]
 
-cmake.minimum-version = "3.15"
+cmake.minimum-version = "3.18"
 ninja.minimum-version = "1.11"
 ninja.make-fallback = true
 cmake.args = [