Update minimum CMake version to 3.10.0 (#3052)

* Update minimum CMake version to 3.10.0

This should fix the warnings that appeared with CMake 3.31:
Compatibility with CMake < 3.10 will be removed from a future version
of CMake.

CMake 3.10.0 was released in November 2017, so this shouldn't be a hard
requirement to meet.

* update github actions

Author: arrufat

.github/workflows/build_cpp.yml

@@ -30,7 +30,7 @@ defaults:
     working-directory: dlib/test
 
 jobs:
-  ubuntu-22-04-gcc-default-cmake-3-8-ffmpeg5:
+  ubuntu-22-04-gcc-default-cmake-3-10-ffmpeg5:
     runs-on: 'ubuntu-22.04'
     steps:
     - uses: actions/checkout@v2
@@ -40,18 +40,18 @@ jobs:
         sudo apt update
         sudo apt install libwebp-dev make yasm
         
-    - name: Cache cmake 3.8.0
+    - name: Cache cmake 3.10.0
       uses: actions/cache@v3
       id: cache-cmake-download
       with:
         # cache this folder:
-        path: ~/cmake-3.8.0-Linux-x86_64
-        key: cmake-3.8.0_try3
+        path: ~/cmake-3.10.0-Linux-x86_64
+        key: cmake-3.10.0_try3
 
     - run: |
         # Get the minimum version of cmake dlib supports
-        wget https://cmake.org/files/v3.8/cmake-3.8.0-Linux-x86_64.tar.gz
-        tar -xf cmake-3.8.0-Linux-x86_64.tar.gz -C ~
+        wget https://cmake.org/files/v3.10/cmake-3.10.0-Linux-x86_64.tar.gz
+        tar -xf cmake-3.10.0-Linux-x86_64.tar.gz -C ~
       if: steps.cache-cmake-download.outputs.cache-hit != 'true'
 
     - name: Cache FFmpeg 5
@@ -76,7 +76,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        ~/cmake-3.8.0-Linux-x86_64/bin/cmake -DCMAKE_PREFIX_PATH=/home/runner/ffmpeg-n5.1.3_installation .. 
+        ~/cmake-3.10.0-Linux-x86_64/bin/cmake -DCMAKE_PREFIX_PATH=/home/runner/ffmpeg-n5.1.3_installation .. 
     
     - name: Build just tests
       run: |

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 project(dlib_project)
 

dlib/CMakeLists.txt

@@ -4,7 +4,7 @@
 #
 
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 set(CMAKE_DISABLE_SOURCE_CHANGES ON)
 set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)

dlib/cmake_utils/check_if_avx_instructions_executable_on_host.cmake

@@ -1,6 +1,6 @@
 # This script checks if your compiler and host processor can generate and then run programs with AVX instructions.
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # Don't rerun this script if its already been executed.
 if (DEFINED AVX_IS_AVAILABLE_ON_HOST)

dlib/cmake_utils/check_if_neon_available.cmake

@@ -1,6 +1,6 @@
 # This script checks if __ARM_NEON__ is defined for your compiler
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # Don't rerun this script if its already been executed.
 if (DEFINED ARM_NEON_IS_AVAILABLE)

dlib/cmake_utils/check_if_sse4_instructions_executable_on_host.cmake

@@ -1,6 +1,6 @@
 # This script checks if your compiler and host processor can generate and then run programs with SSE4 instructions.
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # Don't rerun this script if its already been executed.
 if (DEFINED SSE4_IS_AVAILABLE_ON_HOST)

dlib/cmake_utils/find_ffmpeg.cmake

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 message(STATUS "Searching for FFMPEG/LIBAV")
 find_package(PkgConfig)

dlib/cmake_utils/find_libjpeg.cmake

@@ -1,7 +1,7 @@
 #This script just runs CMake's built in JPEG finding tool.  But it also checks that the
 #copy of libjpeg that cmake finds actually builds and links.
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 if (BUILDING_PYTHON_IN_MSVC)
    # Never use any system copy of libjpeg when building python in visual studio

dlib/cmake_utils/find_libpng.cmake

@@ -1,7 +1,7 @@
 #This script just runs CMake's built in PNG finding tool.  But it also checks that the
 #copy of libpng that cmake finds actually builds and links.
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 if (BUILDING_PYTHON_IN_MSVC)
    # Never use any system copy of libpng when building python in visual studio

dlib/cmake_utils/set_compiler_specific_options.cmake

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 
 # Check if we are being built as part of a pybind11 module. 

dlib/cmake_utils/tell_visual_studio_to_use_static_runtime.cmake

@@ -2,7 +2,7 @@
 # Including this cmake script into your cmake project will cause visual studio
 # to build your project against the static C runtime.
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 if (MSVC OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
    option (DLIB_FORCE_MSVC_STATIC_RUNTIME "use static runtime" ON)

dlib/cmake_utils/test_for_avx/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(avx_test)
 
 set(USE_AVX_INSTRUCTIONS ON CACHE BOOL "Use AVX instructions")

dlib/cmake_utils/test_for_cuda/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(cuda_test)
 
 include_directories(../../cuda)

dlib/cmake_utils/test_for_cudnn/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(cudnn_test)
 
 # Override the FindCUDA.cmake setting to avoid duplication of host flags if using a toolchain:

dlib/cmake_utils/test_for_libjpeg/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(test_if_libjpeg_is_broken)
 
 find_package(JPEG)

dlib/cmake_utils/test_for_libjxl/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(test_if_libjxl_is_broken)
 
 include_directories(${JXL_INCLUDE_DIR})

dlib/cmake_utils/test_for_libpng/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(test_if_libpng_is_broken)
 
 find_package(PNG)

dlib/cmake_utils/test_for_libwebp/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(test_if_libwebp_is_broken)
 
 include_directories(${WEBP_INCLUDE_DIR})

dlib/cmake_utils/test_for_neon/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(neon_test)
 
 add_library(neon_test STATIC neon_test.cpp )

dlib/cmake_utils/test_for_sse4/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project(sse4_test)
 
 set(USE_SSE4_INSTRUCTIONS ON CACHE BOOL "Use SSE4 instructions")

dlib/java/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 project (myproject)
 set(java_package_name net.dlib)
 set(source_files

dlib/matlab/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 PROJECT(mex_functions)
 

dlib/test/CMakeLists.txt

@@ -3,7 +3,7 @@
 # information about it at http://www.cmake.org
 #
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # create a variable called target_name and set it to the string "dtest"
 set (target_name dtest)

dlib/test/blas_bindings/CMakeLists.txt

@@ -3,7 +3,7 @@
 # information about it at http://www.cmake.org
 #
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # This variable contains a list of all the tests we are building
 # into the regression test suite.

dlib/test/tools/CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 add_subdirectory(../../../tools/imglab imglab_build)
 add_subdirectory(../../../tools/htmlify htmlify_build)

examples/CMakeLists.txt

@@ -32,7 +32,7 @@
 #
 
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 # Every project needs a name.  We call this the "examples" project.
 project(examples)
 

tools/archive/CMakeLists.txt

@@ -4,7 +4,7 @@
 #
 
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 PROJECT(archive)
 
 

tools/convert_dlib_nets_to_caffe/CMakeLists.txt

@@ -3,7 +3,7 @@
 # information about it at http://www.cmake.org
 #
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 set (target_name dtoc)
 

tools/htmlify/CMakeLists.txt

@@ -3,7 +3,7 @@
 # information about it at http://www.cmake.org
 #
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # create a variable called target_name and set it to the string "htmlify"
 set (target_name htmlify)

tools/imglab/CMakeLists.txt

@@ -3,7 +3,7 @@
 # information about it at http://www.cmake.org
 #
 
-cmake_minimum_required(VERSION 3.8.0)
+cmake_minimum_required(VERSION 3.10.0)
 
 # create a variable called target_name and set it to the string "imglab"
 set (target_name imglab)

tools/python/CMakeLists.txt

@@ -1,5 +1,5 @@
 
-CMAKE_MINIMUM_REQUIRED(VERSION 3.8.0)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.10.0)
 
 if (WIN32 AND NOT "${CMAKE_GENERATOR}" MATCHES "Visual Studio") 
    message(FATAL_ERROR "\n"