Merge pull request #212 from PJK/cmake_update

Updates for CMake 3, CMAKE_MODULE_PATH as subproject

CHANGELOG.md

@@ -4,6 +4,8 @@ Next
 - BREAKING: Improved half-float encoding for denormalized numbers. [[#208]](https://github.com/PJK/libcbor/pull/208) (by [ranvis](https://github.com/ranvis))
   - Denormalized half-floats will now preserve data in the mantissa
   - Note: Half-float NaNs still lose data (https://github.com/PJK/libcbor/issues/215)
+- BUILD BREAKING: Minimum CMake version is 3.0 [[#201]](https://github.com/PJK/libcbor/pull/201) (by [thewtex@](https://github.com/thewtex))
+  - See https://repology.org/project/cmake/versions for support; the vast majority of users should not be affected.
 
 0.9.0 (2021-11-14)
 ---------------------

CMakeLists.txt

@@ -1,6 +1,6 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 3.0)
 project(libcbor)
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/CMakeModules/")
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/")
 include(CTest)
 
 SET(CBOR_VERSION_MAJOR "0")
@@ -139,20 +139,20 @@ else()
     message(STATUS "LTO is not enabled")
 endif(use_lto)
 
-subdirs(src)
+add_subdirectory(src)
 if(use_lto)
     set_property(DIRECTORY src PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
 endif(use_lto)
 
 if (WITH_TESTS)
-    subdirs(test)
+    add_subdirectory(test)
     if(use_lto)
         set_property(DIRECTORY test PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
     endif(use_lto)
 endif (WITH_TESTS)
 
 if (WITH_EXAMPLES)
-    subdirs(examples)
+    add_subdirectory(examples)
     if(use_lto)
         set_property(DIRECTORY examples PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
     endif(use_lto)