cmake_minimum_required(VERSION 3.0)

# new feature to Cmake Version > 2.8.12
# Mac ONLY. Define Relative Path on Mac OS
if(NOT DEFINED CMAKE_MACOSX_RPATH)
  set(CMAKE_MACOSX_RPATH 0)
endif()

# Set the version number for the library
set (GTSAM_VERSION_MAJOR 4)
set (GTSAM_VERSION_MINOR 2)
set (GTSAM_VERSION_PATCH 2)
set (GTSAM_PRERELEASE_VERSION "")
math (EXPR GTSAM_VERSION_NUMERIC "10000 * ${GTSAM_VERSION_MAJOR} + 100 * ${GTSAM_VERSION_MINOR} + ${GTSAM_VERSION_PATCH}")

if (${GTSAM_VERSION_PATCH} EQUAL 0)
    set (GTSAM_VERSION_STRING "${GTSAM_VERSION_MAJOR}.${GTSAM_VERSION_MINOR}${GTSAM_PRERELEASE_VERSION}")
else()
    set (GTSAM_VERSION_STRING "${GTSAM_VERSION_MAJOR}.${GTSAM_VERSION_MINOR}.${GTSAM_VERSION_PATCH}${GTSAM_PRERELEASE_VERSION}")
endif()

project(GTSAM
        LANGUAGES CXX C
        VERSION "${GTSAM_VERSION_MAJOR}.${GTSAM_VERSION_MINOR}.${GTSAM_VERSION_PATCH}")

message(STATUS "GTSAM Version: ${GTSAM_VERSION_STRING}")

set (CMAKE_PROJECT_VERSION_MAJOR ${GTSAM_VERSION_MAJOR})
set (CMAKE_PROJECT_VERSION_MINOR ${GTSAM_VERSION_MINOR})
set (CMAKE_PROJECT_VERSION_PATCH ${GTSAM_VERSION_PATCH})

###############################################################################
# Gather information, perform checks, set defaults

set(CMAKE_MODULE_PATH "${CMAKE_MODULE_PATH}" "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
include(GtsamMakeConfigFile)
include(GNUInstallDirs)

# Load build type flags and default to Debug mode
include(GtsamBuildTypes)

# Use macros for creating tests/timing scripts
include(GtsamTesting)
include(GtsamPrinting)

# guard against in-source builds
if(${GTSAM_SOURCE_DIR} STREQUAL ${GTSAM_BINARY_DIR})
  message(FATAL_ERROR "In-source builds not allowed. Please make a new directory (called a build directory) and run CMake from there. You may need to remove CMakeCache.txt. ")
endif()

include(cmake/HandleGeneralOptions.cmake)   # CMake build options

# Libraries:
include(cmake/HandleBoost.cmake)            # Boost
include(cmake/HandleCCache.cmake)           # ccache
include(cmake/HandleCPack.cmake)            # CPack
include(cmake/HandleEigen.cmake)            # Eigen3
include(cmake/HandleMetis.cmake)            # metis
include(cmake/HandleMKL.cmake)              # MKL
include(cmake/HandleOpenMP.cmake)           # OpenMP
include(cmake/HandlePerfTools.cmake)        # Google perftools
include(cmake/HandlePython.cmake)           # Python options and commands
include(cmake/HandleTBB.cmake)              # TBB
include(cmake/HandleUninstall.cmake)        # for "make uninstall"

include(cmake/HandleAllocators.cmake)       # Must be after tbb, pertools

include(cmake/HandleGlobalBuildFlags.cmake) # Build flags

###############################################################################
# Add components

# Build CppUnitLite
add_subdirectory(CppUnitLite)

# Build GTSAM library
add_subdirectory(gtsam)

# Build Tests
add_subdirectory(tests)

# Build examples
add_subdirectory(examples)

# Build timing
add_subdirectory(timing)

# Build gtsam_unstable
if (GTSAM_BUILD_UNSTABLE)
    add_subdirectory(gtsam_unstable)
endif()

# This is the new wrapper
if(GTSAM_BUILD_PYTHON OR GTSAM_INSTALL_MATLAB_TOOLBOX)
    # Need to set this for the wrap package so we don't use the default value.
    set(WRAP_PYTHON_VERSION ${GTSAM_PYTHON_VERSION}
        CACHE STRING "The Python version to use for wrapping")
    # Set the include directory for matlab.h
    set(GTWRAP_INCLUDE_NAME "wrap")

    # Copy matlab.h to the correct folder.
    configure_file(${PROJECT_SOURCE_DIR}/wrap/matlab.h
               ${PROJECT_BINARY_DIR}/wrap/matlab.h COPYONLY)

    add_subdirectory(wrap)
    list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_LIST_DIR}/wrap/cmake")
endif()

# Python toolbox
if(GTSAM_BUILD_PYTHON)
    add_subdirectory(python)
endif()

# Matlab toolbox
if(GTSAM_INSTALL_MATLAB_TOOLBOX)
    add_subdirectory(matlab)
endif()

# Install config and export files
GtsamMakeConfigFile(GTSAM "${CMAKE_CURRENT_SOURCE_DIR}/gtsam_extra.cmake.in")
export(TARGETS ${GTSAM_EXPORTED_TARGETS} FILE GTSAM-exports.cmake)

if (GTSAM_BUILD_UNSTABLE)
    GtsamMakeConfigFile(GTSAM_UNSTABLE "${CMAKE_CURRENT_SOURCE_DIR}/gtsam_extra.cmake.in")
    export(TARGETS ${GTSAM_UNSTABLE_EXPORTED_TARGETS} FILE GTSAM_UNSTABLE-exports.cmake)
endif()

# Check for doxygen availability - optional dependency
find_package(Doxygen)

# Doxygen documentation - enabling options in subfolder
if (DOXYGEN_FOUND)
    add_subdirectory(doc)
endif()

# CMake Tools
add_subdirectory(cmake)

# Print configuration variables
include(cmake/HandlePrintConfiguration.cmake)

# Print warnings at the end
include(cmake/HandleFinalChecks.cmake)

# Include CPack *after* all flags
include(CPack)
