CMakeLists.txt

cmake_minimum_required(VERSION 3.9.0)

# Check + Enforce build type
set(default_build_type "Release")

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
  message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
  set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
    STRING "Choose the type of build." FORCE)
  # Set the possible values of build type for cmake-gui
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
    "Debug" "Release")
endif()

if (CMAKE_BUILD_TYPE MATCHES "^((p|P)(rofile|rof))|(release)$")
  message(STATUS "Setting build type to 'Release' instead of '${CMAKE_BUILD_TYPE}'.")
  set(CMAKE_BUILD_TYPE "Release" CACHE
    STRING "Choose the type of build." FORCE)
endif()

if (CMAKE_BUILD_TYPE MATCHES "^debug$")
  message(STATUS "Setting build type to 'Debug' instead of '${CMAKE_BUILD_TYPE}'.")
  set(CMAKE_BUILD_TYPE "Debug" CACHE
    STRING "Choose the type of build." FORCE)
endif()

if (NOT CMAKE_BUILD_TYPE MATCHES "^(Debug|Release)$")
  message(FATAL_ERROR "'${CMAKE_BUILD_TYPE}' is not a valid build type. Please choose either 'Release' or 'Debug'.")
endif()

message(STATUS "Build Type: ${CMAKE_BUILD_TYPE}" )


# enable c++20 standard
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_CXX_STANDARD_REQUIRED on)

# make sure CMake is able to find ROOT
list(APPEND CMAKE_PREFIX_PATH $ENV{ROOTSYS})
message(STATUS "Building against ROOT $ENV{ROOTSYS}" )

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

# versioning

set (_build_ver_maj 0)
set (_build_ver_min 0)
set (_build_ver_patch 0)
set (_build_ver_commits_since_tag 0)
set (_build_ver_commit_short 0)

# find git information
find_package(Git)

if(GIT_FOUND)
  execute_process(
    COMMAND ${GIT_EXECUTABLE} describe --tags
    WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}"
    OUTPUT_VARIABLE _build_version
    ERROR_QUIET
    OUTPUT_STRIP_TRAILING_WHITESPACE
    )
  message( STATUS "git describes this revision as: ${_build_version}")

  if (_build_version MATCHES  "^[vV]?([0-9]+)[._]([0-9]+)[._]([0-9]+)(.*)$")
    set (_build_ver_maj ${CMAKE_MATCH_1})
    set (_build_ver_min ${CMAKE_MATCH_2})
    set (_build_ver_patch ${CMAKE_MATCH_3})
    set (_build_ver_commits_since_tag ${CMAKE_MATCH_4})
    #    set (_build_ver_commit_short ${CMAKE_MATCH_5})
    message( STATUS "Version string correctly matched: major= ${_build_ver_maj}, minor= ${_build_ver_min}, patch= ${_build_ver_patch}, other=${_build_ver_commits_since_tag}")
  else()
    message (STATUS "Version not parsed!")
  endif()
else()
  message( STATUS "Git not found!")
endif()


# Set project name and version
project (KinKal
  LANGUAGES CXX
  VERSION ${_build_ver_maj}.${_build_ver_min}.${_build_ver_patch}
  DESCRIPTION "Kinematic Kalman filter track fit code package"
  )

message( STATUS "Project Version: ${CMAKE_PROJECT_VERSION}")
message( STATUS "Commits made since last tag: ${_build_ver_commits_since_tag}")
message( STATUS "Commit short hash: ${_build_ver_commit_short}")


# make the library names unique
set(CMAKE_SHARED_LIBRARY_PREFIX "libKinKal_")

# find the ROOT dependency
find_package(ROOT REQUIRED COMPONENTS
  Core RIO Net Hist GenVector MLP Graf Graf3d Gpad Tree
  Rint Postscript Matrix Physics MathCore Thread Gui)

# include "useful" ROOT cmake functions
# which are useful for building dictionaries
include(${ROOT_USE_FILE})

# set RPATH options
#set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
#set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
set(CMAKE_SKIP_INSTALL_RPATH ON)
#
# output shared libraries and executables in lib/ and bin/
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin)

# enable tests
enable_testing()

# compiler flags
add_compile_options(
  # flags applied to ALL build types
  "-Wall"
  "-Wno-unused-parameter"
  "-Wno-unused-local-typedefs"
  "-Werror"
  #  "-Wpedantic"
  "-gdwarf-2"
  "-Werror=return-type"
  "-Winit-self"
  "-Woverloaded-virtual"
  "-fdiagnostics-color=always"
  "-Werror=sign-compare"
  "-Wdeprecated-copy"
  #    "-Wshadow"
  # debug flags
  "$<$<CONFIG:DEBUG>:-O0;-g;-ftrapping-math>"
  # release flags
  "$<$<CONFIG:RELEASE>:-O3;-DNDEBUG;-fno-omit-frame-pointer>"
  )
if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
  # gcc doesn't like the lazy memory evaluation in root SMatrix,  This turns a fatal error into a warning (the code runs fine)
  add_compile_options(
    "-Wno-error=maybe-uninitialized"
    )
endif()
# install rules
include(GNUInstallDirs)


# clang tidy

if(ENABLE_CLANG_TIDY)
  set(CMAKE_CXX_CLANG_TIDY "clang-tidy")
endif()

if(ENABLE_CLANG_TIDY_WITH_FIXES)
  set(CMAKE_CXX_CLANG_TIDY "clang-tidy;-fix")
endif()

if (CMAKE_BUILD_TYPE MATCHES "^Debug$")
  message(STATUS "debug build")
  if (COVERAGE)
    add_compile_options("-fprofile-arcs" "-ftest-coverage")
    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
      # using Clang / LLVM
      link_libraries(-fprofile-instr-generate)
      add_custom_target(coverage
        COMMAND gcovr --gcov-executable "llvm-cov gcov" -r ${CMAKE_SOURCE_DIR} ${PROJECT_BINARY_DIR} -s --exclude-directories Tests
        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
        )
    elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
      # gcc doesn't like the lazy memory evaluation in root SMatrix,  This turns a fatal error into a warning (the code runs fine)
      add_compile_options(
        "-Wno-error=maybe-uninitialized"
        )
        link_libraries(-lgcov) # gcov symbols
      add_custom_target(coverage
        COMMAND gcovr -r ${CMAKE_SOURCE_DIR} ${PROJECT_BINARY_DIR} -s --exclude-directories Tests
        WORKING_DIRECTORY ${PROJECT_BINARY_DIR}
        )
    endif()
  endif()
  if (SANITIZE)
    message(STATUS "Sanitize build")
    add_compile_options("-fsanitize=address" "-fno-omit-frame-pointer")
    add_link_options("-fsanitize=address")
  endif()
endif()

# add shared library targets
add_subdirectory(MatEnv)
add_subdirectory(General)
add_subdirectory(Geometry)
add_subdirectory(Detector)
add_subdirectory(Trajectory)
add_subdirectory(Fit)
add_subdirectory(Examples)
add_subdirectory(Tests)


install(TARGETS General Trajectory Geometry Detector Fit MatEnv Examples
  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
  PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

# install headers
# Globbing here is fine because it does not influence build behaviour
install(DIRECTORY "${CMAKE_SOURCE_DIR}/"
  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/KinKal
  FILES_MATCHING PATTERN "*.hh" PATTERN "*.h"
  PATTERN "LinkDef.h" EXCLUDE
  PATTERN ".git*" EXCLUDE
  )

message (STATUS "Writing setup.sh...")

file(WRITE ${PROJECT_BINARY_DIR}/setup.sh "
#
# Do not hand edit this file. It was generated by CMake.
#
(return 0 2>/dev/null) && sourced=1 || sourced=0
if [ \"\$sourced\" = \"0\" ];then
echo \"You should be sourcing this file, not executing it.\"
exit 1
fi
export DEBUG_LEVEL=${CMAKE_BUILD_TYPE}

# Linux:
export LD_LIBRARY_PATH=${CMAKE_CURRENT_BINARY_DIR}/lib:\${LD_LIBRARY_PATH}

# MacOS:
export DYLD_FALLBACK_LIBRARY_PATH=${CMAKE_CURRENT_BINARY_DIR}/lib:\${ROOT_LIB}:\${DYLD_FALLBACK_LIBRARY_PATH}

# Define the KinKal package for others:
export KINKAL_SOURCE_DIR=${CMAKE_SOURCE_DIR}
export KINKAL_LIBRARY_DIR=${CMAKE_CURRENT_BINARY_DIR}/lib

")