Bump CMake minimum required version to 3.10

Newer CMake v4.x dropped support for versions < 3.10

Author: johguenther

CHANGELOG.md

@@ -30,6 +30,7 @@ Version History
     -   ISPCRT v1.25.2 (uses IEEE 754 compliant instructions on ARM for
         min/max)
     -   rkcommon v1.15.2
+    -   CMake v3.10
 
 ### Changes in v3.2.0:
 

CMakeLists.txt

@@ -1,7 +1,7 @@
 ## Copyright 2009 Intel Corporation
 ## SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.8)
+cmake_minimum_required(VERSION 3.10)
 
 ##############################################################
 # Language setup

apps/ospTutorial/ospTutorialFindospray/CMakeLists.txt

@@ -12,7 +12,7 @@
 #       should build the ospTutorial app from that install and NOT use your
 #       local build.
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 
 project(ospTutorialFindospray LANGUAGES C)
 

doc/compilation.md

@@ -91,7 +91,7 @@ Finding an OSPRay Install with CMake
 Client applications using OSPRay can find it with CMake's
 `find_package()` command. For example,
 
-    find_package(ospray 3.0.0 REQUIRED)
+    find_package(ospray 3.3.0 REQUIRED)
 
 finds OSPRay via OSPRay's configuration file `osprayConfig.cmake`^[This
 file is usually in

doc/prerequisites.md

@@ -15,7 +15,8 @@ before you can build OSPRay you need the following prerequisites:
 
         git clone https://github.com/RenderKit/ospray.git
 
--   To build OSPRay you need [CMake](http://www.cmake.org), any form of
+-   To build OSPRay you need [CMake](http://www.cmake.org) version 3.10
+    or higher, any form of
     C++11 compiler (we recommend using GCC, but also support Clang,
     MSVC, and [Intel® C++ Compiler
     (icc)](https://software.intel.com/en-us/c-compilers)), and standard

scripts/superbuild/CMakeLists.txt

@@ -3,7 +3,7 @@
 
 ## Global settings ##
 
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.10)
 set(CMAKE_INSTALL_MESSAGE LAZY)
 
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/dependencies)

test_image_data/CMakeLists.txt

@@ -1,7 +1,7 @@
 ## Copyright 2009 Intel Corporation
 ## SPDX-License-Identifier: Apache-2.0
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.10)
 
 project(ospray_test_data NONE)