cmake_minimum_required (VERSION 2.8)
project (mraa)

FIND_PACKAGE (Threads REQUIRED)

set (CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -Wall -fno-omit-frame-pointer")
set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Wall")
set (LIB_INSTALL_DIR "lib${LIB_SUFFIX}" CACHE PATH "Installation path for libraries")

# Set CMAKE_LIB_INSTALL_DIR if not defined
include(GNUInstallDirs)

# Appends the cmake/modules path to MAKE_MODULE_PATH variable.
set (CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})

# Make a version file containing the current version from git.
include (GetGitRevisionDescription)
git_describe (VERSION "--tags")
if ("x_${VERSION}" STREQUAL "x_GIT-NOTFOUND")
  message (WARNING " - Install git to compile a production libmraa!")
  set (VERSION "v0.6.1-dirty")
endif ()

message (INFO " - libmraa Version ${VERSION}")

#parse the version information into pieces.
string (REGEX REPLACE "^v([0-9]+)\\..*" "\\1" VERSION_MAJOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.([0-9]+).*" "\\1" VERSION_MINOR "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.([0-9]+).*" "\\1" VERSION_PATCH "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+\\-([0-9]+).*" "\\1" VERSION_COMMIT "${VERSION}")
string (REGEX REPLACE "^v[0-9]+\\.[0-9]+\\.[0-9]+-[0-9]+\\-(.*)" "\\1" VERSION_SHA1 "${VERSION}")
set (VERSION_SHORT "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")

if ("${VERSION_COMMIT}" MATCHES "^v.*")
  set (VERSION_COMMIT "")
endif()

configure_file (${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules/version.c.in
                ${CMAKE_CURRENT_BINARY_DIR}/src/version.c)

# this is the library version, independant of git revision
set (mraa_VERSION_MAJOR ${VERSION_MAJOR})
set (mraa_VERSION_MINOR ${VERSION_MINOR})
set (mraa_VERSION_PATCH ${VERSION_PATCH})
set (mraa_VERSION_STRING ${mraa_VERSION_MAJOR}.${mraa_VERSION_MINOR}.${mraa_VERSION_PATCH})

set (CMAKE_SWIG_FLAGS "")

find_path (SYSTEM_USR_DIR "stdlib.h")
include_directories (${SYSTEM_USR_DIR})

option (GTEST "Build all gtests." OFF)
option (BUILDDOC "Build all doc." OFF)
option (BUILDSWIG "Build swig modules." ON)
option (BUILDSWIGPYTHON "Build swig python modules." ON)
option (BUILDSWIGNODE "Build swig node modules." ON)
option (IPK "Generate IPK using CPack" OFF)
option (BUILDPYTHON3 "Use python3 for building/installing" OFF)

include (TargetArch)
target_architecture (DETECTED_ARCH)
message( INFO " - Target arch is ${DETECTED_ARCH}")

if (DETECTED_ARCH STREQUAL "i586" OR DETECTED_ARCH STREQUAL "x86_64"
    OR DETECTED_ARCH STREQUAL "i386")
  set (X86PLAT ON)
elseif (DETECTED_ARCH MATCHES "arm.*")
  set (ARMPLAT ON)
else ()
  message(FATAL_ERROR "Only x86 and arm platforms currently supported")
endif()

if (GTEST)
  enable_testing ()
  add_subdirectory (tests)
endif ()

if (BUILDDOC)
  # add a target to generate API documentation with Doxygen
  find_package (Doxygen)
  if (DOXYGEN_FOUND)
    configure_file (${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
    add_custom_target (doc
      ${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
      COMMENT "Generating API documentation with Doxygen" VERBATIM
    )
  endif (DOXYGEN_FOUND)
endif ()

if (IPK)
  set(CPACK_GENERATOR "DEB" "TGZ")
  set(OPKG_ARCH ${DETECTED_ARCH})
  set(CPACK_BINARY_DIR ${CMAKE_BINARY_DIR})
  set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Intel IoT-Devkit") #required
  set(mraa_PACKAGE_ON_TAG ".")
  if ("${VERSION_COMMIT}" STREQUAL "")
    set(mraa_PACKAGE_ON_TAG "")
  endif()
  set(CPACK_PACKAGE_VERSION 
      "${mraa_VERSION_MAJOR}.${mraa_VERSION_MINOR}.${mraa_VERSION_PATCH}${mraa_PACKAGE_ON_TAG}${VERSION_COMMIT}")
  set(CPACK_PACKAGE_NAME "libmraa${mraa_VERSION_MAJOR}")
  set(CPACK_DEBIAN_PACKAGE_SECTION "libs")
  set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE ${DETECTED_ARCH})
  set(CPACK_SYSTEM_NAME ${DETECTED_ARCH})
  set(CPACK_DEBIAN_PACKAGE_PROVIDES "libmraa-dev, libmraa-dbg, libmraa-doc")
  set(CPACK_DEBIAN_PACKAGE_REPLACES ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(CPACK_DEBIAN_PACKAGE_CONFLICTS ${CPACK_DEBIAN_PACKAGE_PROVIDES})
  set(WDIR "${CPACK_TOPLEVEL_DIRECTORY}/${CPACK_PACKAGE_FILE_NAME}")
  include (CPack)
endif()

add_subdirectory (src)
add_subdirectory (examples)