####################################################
#                                                  #
#           SpecMiCP : CMakeLists.txt              #
#                                                  #
####################################################

project(specmicp)
cmake_minimum_required(VERSION 2.8.8)

# Configuration options
# ======================

# For an explanation of the options see the INSTALL file
option(SPECMICP_USE_OPENMP "Thread parallelisation of specmicp instances if available" ON)
option(SPECMICP_NO_DEBUG "Disable SpecMiCP assert" OFF)
option(SPECMICP_BUILD_STATIC "Build static libraries" OFF)
option(SPECMICP_BUILD_EXAMPLE "Build the examples" ON)
option(SPECMICP_DEBUG_EQUATION_FD_JACOBIAN "Use a finite difference jacobian is specmicp" OFF)

# global variables
# ================

set(SPECMICP_VERSION 0.0.3)

# External Package
# ================

set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PROJECT_SOURCE_DIR}/cmake/")

# OpenMP
#-------
# not required but recommended
find_package(OpenMP)

# Boost
# -----
find_package(Boost REQUIRED)
include_directories(${Boost_INCLUDE_DIR})

# Eigen
# -----
find_package(Eigen3 REQUIRED)  # This module comes from the Eigen3 Package
include_directories(${EIGEN3_INCLUDE_DIR})
# Eigen unsuported
# GMRES.h is really the file we are using/looking for
# If it doesn't exist then the solver will not be included in the list of the parse solvers
if(EXISTS "${EIGEN3_INCLUDE_DIR}/unsupported/Eigen/src/IterativeSolvers/GMRES.h")
    add_definitions(-DEIGEN_UNSUPPORTED_FOUND)
    INCLUDE_DIRECTORIES("${EIGEN3_INCLUDE_DIR}/unsupported/")
endif()

# compilation flags
# =================

# c++11
# -----

include(CheckCXXCompilerFlag)

if(NOT CX11_FLAG)
    check_cxx_compiler_flag("-std=c++11" HAS_CXX11)
    if(NOT HAS_CXX11)
        message(FATAL_ERROR "A c++11 compatible compiler is necessary")
    else()
        set(CXX11_FLAG "-std=c++11")
    endif()
endif()


if(UNIX)
    # Use ld.gold if it is available and isn't disabled explicitly
    # Ref : https://bugs.webkit.org/show_bug.cgi?id=137953
    option(USE_LD_GOLD "Use GNU gold linker" ON)
    if (USE_LD_GOLD)
        execute_process(COMMAND ${CMAKE_C_COMPILER} -fuse-ld=gold -Wl,--version ERROR_QUIET OUTPUT_VARIABLE LD_VERSION)
        if ("${LD_VERSION}" MATCHES "GNU gold")
           set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fuse-ld=gold")
           set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fuse-ld=gold")
        else ()
           message(WARNING "GNU gold linker isn't available, using the default system linker.")
        endif ()
     endif ()

   # Generic options
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CXX11_FLAG}")
   if (OPENMP_FOUND)
       SET( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${OpenMP_C_FLAGS}")
       SET( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
   endif()
   SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -pedantic")
   ##SET(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG")
   message(STATUS "c++ flags ${CMAKE_CXX_FLAGS}")
else()
    message(WARNING "not tested !")
endif()

#                        Directories
#########################################################################

# 3rd party
# =========

# JsonCPP
# -------

set(JSONCPP_DIR  ${PROJECT_SOURCE_DIR}/3rdparty/jsoncpp/)

add_custom_target(3rdparty_header SOURCES
    ${JSONCPP_DIR}/json/json.h
    ${JSONCPP_DIR}/json/json-forwards.h
)
include_directories(${JSONCPP_DIR})


# installation dir
# ----------------
# http://www.cmake.org/pipermail/cmake/2010-February/035466.html
# compute default library install dir
if(UNIX)
# library
# ------
set (_DEFAULT_LIBRARY_INSTALL_DIR lib)
if (EXISTS "${CMAKE_INSTALL_PREFIX}/lib32/" AND CMAKE_SIZEOF_VOID_P EQUAL 4)
 set (_DEFAULT_LIBRARY_INSTALL_DIR lib32)
elif (EXISTS "${CMAKE_INSTALL_PREFIX}/lib64/" AND CMAKE_SIZEOF_VOID_P EQUAL 8)
 set (_DEFAULT_LIBRARY_INSTALL_DIR lib64)
endif ()
# the library install dir
set(LIBRARY_INSTALL_DIR "${_DEFAULT_LIBRARY_INSTALL_DIR}" CACHE PATH "Installation directory for libraries")
set(STATIC_LIBRARY_INSTALL_DIR "${_DEFAULT_LIBRARY_INSTALL_DIR}/static" CACHE PATH "Installation directory for static libraries")
# make the library install dir an absolute path (can be important e.g. when using CONFIGURE_FILE to embed
# the library installation directory into a file)
if(NOT IS_ABSOLUTE "${LIBRARY_INSTALL_DIR}")
  set(LIBRARY_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${LIBRARY_INSTALL_DIR}")
endif()
if(NOT IS_ABSOLUTE "${STATIC_LIBRARY_INSTALL_DIR}")
  set(STATIC_LIBRARY_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${STATIC_LIBRARY_INSTALL_DIR}")
endif()
# include
#--------
set(INCLUDE_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/include/specmicp")
# share
#------
set(SHARE_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/share/specmicp")
else()
    message(WARNING "not tested !")
endif()

#                   CPP API : SpecMiCP / ReactMiCP
#########################################################################

# the main source directory - the c++ api
set(SPECMICP_CPP_API ${CMAKE_CURRENT_SOURCE_DIR}/src)
include_directories(${SPECMICP_CPP_API})
add_subdirectory( ${SPECMICP_CPP_API} )

#                        Database
#########################################################################

add_subdirectory( data )

#                       Documentation
#########################################################################

# "common" documentation
# -----------------------
set(
    DOCS_LIST
    ${CMAKE_CURRENT_SOURCE_DIR}/README.md
    ${CMAKE_CURRENT_SOURCE_DIR}/INSTALL
    ${CMAKE_CURRENT_SOURCE_DIR}/COPYING
)

add_custom_target(docs SOURCES ${DOCS_LIST})
install(FILES ${DOCS_LIST}
    DESTINATION ${SHARE_INSTALL_DIR}
)

# Doxygen documentation
# ---------------------
add_subdirectory( doc )

# the cmake find module
# ---------------------
install(FILES cmake/FindSpecMiCP.cmake
    DESTINATION ${SHARE_INSTALL_DIR}/cmake
)

# The following modules have their own CMakeLists.txt

#                      Python interface
#########################################################################
add_subdirectory( cython )

#                          Tests
#########################################################################
add_subdirectory( tests )

#                        Examples
#########################################################################
add_subdirectory( examples )