add cmake 3.10 support

Author: acxz

CMakeLists.txt

@@ -2,7 +2,7 @@
 ### Matplot++                                       ###
 #######################################################
 # Project information
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.10)
 project(matplotplusplus VERSION 1.0.1)
 set(CMAKE_CXX_STANDARD 17)
 
@@ -14,7 +14,9 @@ include(GNUInstallDirs)
 list(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 message("CMAKE_MODULE_PATH=${CMAKE_MODULE_PATH}")
 option(CPM_USE_LOCAL_PACKAGES "Try `find_package` before downloading dependencies" ON)
-include(cmake/CPM.cmake)
+if (NOT ${CMAKE_VERSION} VERSION_LESS "3.14.0")
+    include(cmake/CPM.cmake)
+endif ()
 
 # Check if this is a master project or a subdirectory of another project
 if (${CMAKE_CURRENT_SOURCE_DIR} STREQUAL ${CMAKE_SOURCE_DIR})
@@ -119,4 +121,4 @@ if (BUILD_INSTALLER AND BUILD_PACKAGE)
 
     # Always include CPack at last
     include(CPack)
-endif ()
+endif ()

matplot++-config.cmake.in

@@ -6,9 +6,9 @@ if(NOT ${MATPLOT_BUILT_SHARED})
 
     list(APPEND CMAKE_MODULE_PATH ${MATPLOT_CONFIG_INSTALL_DIR})
     list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
-    find_dependency(Filesystem)
-    list(POP_BACK CMAKE_MODULE_PATH)
+    find_dependency(Filesystem COMPONENTS Final Experimental)
+    list(REMOVE_ITEM CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}")
 endif()
 
 include("${CMAKE_CURRENT_LIST_DIR}/Matplot++Targets.cmake")
-check_required_components(Matplot++)
+check_required_components(Matplot++)

source/matplot/CMakeLists.txt

@@ -1,4 +1,4 @@
-find_package(Filesystem REQUIRED)
+find_package(Filesystem COMPONENTS Final Experimental REQUIRED)
 
 add_library(matplot
         matplot.h
@@ -241,4 +241,4 @@ if (BUILD_INSTALLER)
             NAMESPACE Matplot++::
             DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/Matplot++
             )
-endif()
+endif()

test/CMakeLists.txt

@@ -1,2 +1,2 @@
 add_subdirectory(generate_examples)
-add_subdirectory(backends)
+add_subdirectory(backends)

test/generate_examples/CMakeLists.txt

@@ -1,4 +1,6 @@
-find_package(Filesystem REQUIRED)
-add_executable(generate_examples main.cpp)
-target_link_libraries(generate_examples std::filesystem)
-target_compile_features(generate_examples PRIVATE cxx_std_17)
+find_package(Filesystem COMPONENTS Final Experimental REQUIRED)
+if (NOT CXX_FILESYSTEM_IS_EXPERIMENTAL)
+    add_executable(generate_examples main.cpp)
+    target_link_libraries(generate_examples std::filesystem)
+    target_compile_features(generate_examples PRIVATE cxx_std_17)
+endif()