Fix CMakeLists.txt and refactor .gitignore

Increase CMake minimum required version to 3.15 due to incompatibilities
with scikit-build-core. Update README.md.

Add POLICY checks to avoid errors on policy-unsupported versions.

Change CMP0167 policy of Boost searching to OLD due to non-compliance
with "Modern CMake" development patterns. Add "TODO" to fix this later.
Add useful logs to understand what Boost libraries were found by CMake.

Apply sort to .gitignore to improve readability.
Add .DS_Store, which is generated in macOS directories.
Add .cache, which is generated by clangd.

.gitignore

@@ -1,14 +1,16 @@
-cmake-build-debug/
-build/
-Build/
-BUILD/
-bUILD/
-Datasets/
-.sconsign.dblite
-lib/
+**/.DS_Store
+**/myeasylog.log
+.cache/
 .csv
 .idea/
+.sconsign.dblite
 .vscode/
-**/myeasylog.log
-dist
-venv
+BUILD/
+Build/
+Datasets/
+bUILD/
+build/
+cmake-build-debug/
+dist/
+lib/
+venv/

CMakeLists.txt

@@ -1,5 +1,12 @@
-cmake_minimum_required(VERSION 3.13)
-cmake_policy(SET CMP0144 NEW)
+cmake_minimum_required(VERSION 3.15)
+if (POLICY CMP0167)
+    # deprecated by definition, TODO: port project to "Modern CMake" https://gist.github.com/mbinna/c61dbb39bca0e4fb7d1f73b0d66a4fd1
+    cmake_policy(SET CMP0167 OLD) 
+endif()
+if (POLICY CMP0144)
+    cmake_policy(SET CMP0144 NEW)
+endif()
+
 project(Desbordante)
 
 option(COPY_PYTHON_EXAMPLES "Copy Python examples" OFF)
@@ -103,9 +110,15 @@ endif()
 
 # configuring boost
 set(Boost_USE_STATIC_LIBS OFF)
-find_package(Boost 1.81.0 REQUIRED COMPONENTS container thread graph CONFIG)
-include_directories(${Boost_INCLUDE_DIRS})
-message(${Boost_INCLUDE_DIRS})
+
+find_package(Boost 1.81.0 REQUIRED COMPONENTS container thread graph)
+if (Boost_FOUND) 
+    message(STATUS "Found Boost include dirs: ${Boost_INCLUDE_DIRS}")
+    include_directories( ${Boost_INCLUDE_DIRS})
+    message(STATUS "Found Boost library dirs: ${Boost_LIBRARY_DIRS}")
+else ()
+    message(FATAL_ERROR "Boost not found. If boost is installed specify environment variables like \"BOOST_ROOT\" for hint to CMake where to search")
+endif()
 
 # providing subdirectories for header inclusion
 include_directories(

README.md

@@ -225,7 +225,7 @@ The following instructions were tested on Ubuntu 20.04+ LTS and macOS Sonoma 14.
 Prior to cloning the repository and attempting to build the project, ensure that you have the following software:
 
 - GNU GCC, version 10+
-- CMake, version 3.13+
+- CMake, version 3.15+
 - Boost library built with GCC, version 1.81.0+
 
 To use test datasets you will need: