chore: switch build system to cmake

There are multiple benefits of using CMake over Autotools like:
- CMake is much more modern and requires much less lines of code as
  compared to doing the same thing in autotools
- Autotools is years of bad decisions, generating a long 50k+ lines of
  bash script to generate the Makefiles definitely isn't a good idea and
  is really slow as well as makes debugging the build process very
  difficult
- Existing projects using termux-elf-cleaner using CMake should benefit
  from this.

.github/workflows/attach_termux_elf_cleaner_to_release.yml

@@ -22,12 +22,18 @@ jobs:
             echo "The versionName '${RELEASE_VERSION_NAME/v/}' is not a valid version as per semantic version '2.0.0' spec in the format 'major.minor.patch(-prerelease)(+buildmetadata)'. https://semver.org/spec/v2.0.0.html."
             exit 1
           fi
+      - name: Install required packages
+        run: |
+          sudo apt update
+          sudo apt upgrade
+          sudo apt install cmake ninja-build
       - name: Build
         run: |
-          autoreconf -vfi
-          mkdir build && cd build
-          ../configure
-          make
+          cmake . -Bbuild -GNinja
+          ninja -C build/
+      - name: Test
+        run: |
+          ninja -C build/ test
       - name: Attach termux-elf-cleaner to release
         uses: termux/[email protected]
         with:

.github/workflows/build.yml

@@ -12,22 +12,15 @@ jobs:
         with:
           ref: ${{ env.GITHUB_REF }}
 
-      - name: Prepare
+      - name: Install required packages
         run: |
-          autoreconf -vfi
-          mkdir build
-
-      - name: Configure
-        run: |
-          cd build
-          ../configure
-
-      - name: Make
+          sudo apt update
+          sudo apt upgrade
+          sudo apt install cmake ninja-build
+      - name: Build
         run: |
-          cd build
-          make
-
+          cmake . -Bbuild -GNinja
+          ninja -C build/
       - name: Test
         run: |
-          cd build
-          make check
+          ninja -C build/ test

.gitignore

@@ -3,8 +3,16 @@ elf-cleaner
 # In case of out-of-src build in a directory build/:
 build/
 
+# Some people prefer to use this as build directory
+out/
+
+# Used for editor integration (completions, etc)
+compile_commands.json
+
 *~
 
+# Generated files from old autotools
+# Although we no longer use autotools, some contributors might still be having it in their trees
 Makefile.in
 aclocal.m4
 autom4te.cache/

CMakeLists.txt

@@ -0,0 +1,38 @@
+cmake_minimum_required(VERSION 3.25 FATAL_ERROR)
+
+set(VERSION_MAJOR 3)
+set(VERSION_MINOR 0)
+set(VERSION_PATCH 0)
+
+set(VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
+
+set(ARCHES aarch64;arm;i686;x86_64)
+set(APIS 21;24)
+
+project(elf-cleaner
+  LANGUAGES C CXX
+  VERSION ${VERSION}
+)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+set(PACKAGE_NAME "termux-elf-cleaner" CACHE STRING "Name of the package")
+
+add_executable("${PACKAGE_NAME}"
+  elf-cleaner.cpp
+  arghandling.c
+)
+
+target_compile_definitions("${PACKAGE_NAME}"
+  PRIVATE "COPYRIGHT=\"Copyright (C) 2022-2024 Termux and contributors.\""
+  PRIVATE "PACKAGE_VERSION=\"${VERSION}\""
+  PRIVATE "PACKAGE_NAME=\"${PACKAGE_NAME}\""
+)
+
+enable_testing()
+add_test(
+  NAME "tests"
+  COMMAND bash -c "${CMAKE_CURRENT_SOURCE_DIR}/tests/test.sh ${CMAKE_CURRENT_BINARY_DIR}/${PACKAGE_NAME} ${CMAKE_CURRENT_SOURCE_DIR}"
+  )

tests/.gitignore

@@ -0,0 +1 @@
+*.test