cmake_minimum_required (VERSION 2.8.8)
#cmake_policy(SET CMP0053 NEW)

project(bsplines_root Fortran C)

#enable_language(Fortran)
enable_testing()

option(BSPLINES_USE_MUMPS "Activate the mumps interface" OFF)
option(BSPLINES_USE_LAPACK "Activate the lapack interface" OFF)
option(BSPLINES_USE_PETSC "Activate the petsc interface" OFF)
option(BSPLINES_USE_SCALAPACK "Activate the scalapack interface" OFF)

if(NOT DEFINED BSPLINES_EXAMPLES)
  option(BSPLINES_EXAMPLES "Compiles the examples" OFF)
endif()

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

if(POLICY CMP0074)
  cmake_policy(SET CMP0074 NEW)
endif()


include(CMakeFlagsHandling)
# Compiler flags for debug/optimization
if(${CMAKE_Fortran_COMPILER_ID} MATCHES "Intel")
  set(CMAKE_AR ${XIAR})
  add_flags(LANG Fortran TYPE DEBUG -traceback "-check bounds" "-warn unused")
  add_flags(LANG Fortran TYPE RELEASE -xHost)
elseif(${CMAKE_Fortran_COMPILER_ID} MATCHES "GNU")
  if(CMAKE_Fortran_COMPILER_VERSION VERSION_GREATER_EQUAL 10.0.0)
    add_flags(LANG Fortran -fallow-argument-mismatch)
  endif()
  add_flags(LANG Fortran TYPE DEBUG -fbounds-check -fbacktrace)
endif()

# Installation root directory
if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
  set(PREFIX $ENV{PREFIX})
  if(PREFIX)
    set(${CMAKE_INSTALL_PREFIX} ${PREFIX})
  else()
    set(CMAKE_INSTALL_PREFIX ${CMAKE_CURRENT_SOURCE_DIR} CACHE PATH "..." FORCE)
  endif()
  message(STATUS "CMAKE_INSTALL_PREFIX is " ${CMAKE_INSTALL_PREFIX})
endif()

# Search and load the FUTILS configuration file
if(NOT TARGET futils)
  find_package(futils PATHS ${FUTILS}/lib/cmake REQUIRED)
endif()

if(BSPLINES_USE_MUMPS)
  find_package(Mumps REQUIRED)
  set(HAS_MUMPS ${MUMPS_FOUND})
else()
  set(HAS_MUMPS FALSE)
endif()

if(BSPLINES_USE_PETSC)
  find_package(PETSc REQUIRED)
  set(HAS_PETSC ${PETSC_FOUND})
else()
  set(HAS_PETSC FALSE)
endif()

# Find lapack/blas. Skip it if on CRAY!
if(CRAY)
  set(BSPLINES_USE_PARDISO OFF)
endif()
include(blas)

if(NOT BSPLINES_EXPORT_TARGETS)
  set(BSPLINES_EXPORT_TARGETS bsplines-targets)
endif()

find_package(MPI COMPONENTS Fortran REQUIRED)

include(GNUInstallDirs)

set(FFT_EXAMPLES ${BSPLINES_EXAMPLES})

add_subdirectory(pppack)
add_subdirectory(pputils2)
add_subdirectory(fft)
add_subdirectory(src)

if(HAS_MUMPS AND BSPLINES_EXAMPLES)
  add_subdirectory(multigrid)
endif()

if(BSPLINES_EXAMPLES)
  add_subdirectory(examples)
  add_subdirectory(wk)
endif()

export(TARGETS pppack pputils2 bsplines fft
  FILE "${CMAKE_BINARY_DIR}/bsplinesLibraryDepends.cmake")
export(PACKAGE bsplines)

# install configuration files
if(BSPLINES_EXPORT_TARGETS MATCHES "bsplines-targets")
  install(EXPORT bsplines-targets
    DESTINATION lib/cmake
    )

  configure_file(
    ${CMAKE_CURRENT_SOURCE_DIR}/cmake/bsplines-config.cmake.in
    ${CMAKE_CURRENT_BINARY_DIR}/cmake/bsplines-config.cmake @ONLY
    )
  install(FILES
    ${CMAKE_CURRENT_BINARY_DIR}/cmake/bsplines-config.cmake
    DESTINATION lib/cmake
    )
endif()

# enable packaging with CPack
include(CPack)