Merge pull request aristocratos#589 from nobounce/cmake

Add CMake support for Linux

.gitignore

@@ -51,9 +51,8 @@ bin
 btop
 .*/
 
-
-#do not ignore .github directory
-!.github
+# Don't ignore .github directory
+!.github/
 
 # Ignore files created by Qt Creator
 *.config
@@ -64,3 +63,19 @@ btop
 *.cxxflags
 *.files
 *.includes
+
+# CMake
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+
+# CLion
+cmake-build-*

CMakeLists.txt

@@ -0,0 +1,167 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# CMake configuration for btop
+#
+
+cmake_minimum_required(VERSION 3.12)
+
+# Disable in-source builds since they would override the Makefile
+if("${CMAKE_CURRENT_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_BINARY_DIR}")
+  message(FATAL_ERROR "In-source builds are not allowed")
+endif()
+
+project("btop"
+  VERSION 1.2.13
+  DESCRIPTION "A monitor of resources"
+  HOMEPAGE_URL "https://github.com/aristocratos/btop"
+  LANGUAGES CXX
+)
+
+# Make custom modules available
+list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules/")
+
+# When the build type is not set we can't fortify
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release)
+endif()
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_COLOR_DIAGNOSTICS ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+# Options
+option(BTOP_STATIC "Link btop statically" OFF)
+option(BTOP_LTO "Enable LTO" ON)
+option(BTOP_USE_MOLD "Use mold to link btop" OFF)
+option(BTOP_PEDANTIC "Enable a bunch of additional warnings" OFF)
+option(BTOP_WERROR "Compile with warnings as errors" OFF)
+
+if(BTOP_STATIC)
+  # Set this before calling find_package
+  set(CMAKE_FIND_LIBRARY_SUFFIXES ".a")
+endif()
+
+if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+  find_package(devstat REQUIRED)
+  find_package(kvm REQUIRED)
+  if(BTOP_STATIC)
+    find_package(elf REQUIRED)
+  endif()
+endif()
+
+include(CheckCXXCompilerFlag)
+include(CheckIPOSupported)
+
+add_executable(btop
+  src/btop.cpp
+  src/btop_config.cpp
+  src/btop_draw.cpp
+  src/btop_input.cpp
+  src/btop_menu.cpp
+  src/btop_shared.cpp
+  src/btop_theme.cpp
+  src/btop_tools.cpp
+)
+
+# NOTE: Checks can be simplified with CMake 3.25
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  target_sources(btop PRIVATE
+    src/osx/btop_collect.cpp
+    src/osx/sensors.cpp
+    src/osx/smc.cpp
+  )
+elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+  target_sources(btop PRIVATE src/freebsd/btop_collect.cpp)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "Linux")
+  target_sources(btop PRIVATE src/linux/btop_collect.cpp)
+else()
+  message(FATAL_ERROR "${CMAKE_SYSTEM_NAME} is not supported")
+endif()
+
+# Check for and enable LTO
+check_ipo_supported(RESULT ipo_supported)
+if(ipo_supported AND BTOP_LTO)
+  set_target_properties(btop PROPERTIES INTERPROCEDURAL_OPTIMIZATION ON)
+endif()
+
+# TODO: enable more warnings in coordination with upstream
+target_compile_options(btop PRIVATE
+  -Wall -Wextra -Wpedantic
+  -ftree-vectorize -fstack-clash-protection
+)
+if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+  target_compile_options(btop PRIVATE
+    -Wheader-hygiene -Wgnu -Wthread-safety
+  )
+endif()
+
+if(BTOP_PEDANTIC)
+  target_compile_options(btop PRIVATE
+    -Wshadow -Wnon-virtual-dtor -Wold-style-cast -Wcast-align -Wunused
+    -Woverloaded-virtual -Wconversion -Wsign-conversion -Wdouble-promotion
+    -Wformat=2 -Wimplicit-fallthrough -Weffc++
+  )
+  if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    target_compile_options(btop PRIVATE
+      -Wduplicated-cond -Wduplicated-branches -Wlogical-op -Wnull-dereference
+      -Wuseless-cast
+    )
+  endif()
+endif()
+
+if(BTOP_WERROR)
+  target_compile_options(btop PRIVATE -Werror)
+endif()
+
+check_cxx_compiler_flag(-fstack-protector CXX_HAS_FSTACK_PROTECTOR)
+if(CXX_HAS_FSTACK_PROTECTOR)
+  target_compile_options(btop PRIVATE -fstack-protector)
+endif()
+
+check_cxx_compiler_flag(-fcf-protection CXX_HAS_FCF_PROTECTION)
+if(CXX_HAS_FCF_PROTECTION)
+  target_compile_options(btop PRIVATE -fcf-protection)
+endif()
+
+target_compile_definitions(btop PRIVATE
+  _FILE_OFFSET_BITS=64
+  _GLIBCXX_ASSERTIONS _LIBCPP_ENABLE_ASSERTIONS=1
+  # Only has an effect with optimizations enabled
+  $<$<NOT:$<CONFIG:Debug>>:_FORTIFY_SOURCE=2>
+)
+
+target_include_directories(btop SYSTEM PRIVATE include)
+
+# mold
+if(BTOP_USE_MOLD)
+  target_link_options(btop PRIVATE -fuse-ld=mold)
+endif()
+
+if(BTOP_STATIC)
+  target_compile_definitions(btop PRIVATE STATIC_BUILD)
+  target_link_options(btop PRIVATE -static LINKER:--fatal-warnings)
+endif()
+
+# Add libraries
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads REQUIRED)
+target_link_libraries(btop PRIVATE Threads::Threads)
+
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  target_link_libraries(btop PRIVATE $<LINK_LIBRARY:FRAMEWORK,CoreFoundation)
+  target_link_libraries(btop PRIVATE $<LINK_LIBRARY:FRAMEWORK,IOKit)
+elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+  target_link_libraries(btop PRIVATE devstat::devstat kvm::kvm)
+  if(BTOP_STATIC)
+    target_link_libraries(btop PRIVATE elf::elf)
+  endif()
+endif()
+
+install(TARGETS btop RUNTIME)
+install(FILES "btop.desktop" DESTINATION "share/applications")
+install(FILES "Img/icon.png" DESTINATION "share/icons/hicolor/48x48/apps" RENAME "btop.png")
+install(FILES "Img/icon.svg" DESTINATION "share/icons/hicolor/scalable/apps" RENAME "btop.svg")
+install(DIRECTORY "themes" DESTINATION "share/btop")
+