cmake_minimum_required(VERSION 2.8.6)

set(VERSION "0.1")
# $Format:Packaged from commit %H%nset(COMMIT %h)%nset(REFS "%d")$

set_property(GLOBAL PROPERTY USE_FOLDERS ON)
set(CMAKE_CONFIGURATION_TYPES "Debug;Release")
enable_testing()

# Check if we're on FreeBSD so we can exclude the local miniupnpc (it should be installed from ports instead)
# CMAKE_SYSTEM_NAME checks are commonly known, but specifically taken from libsdl's CMakeLists
if(CMAKE_SYSTEM_NAME MATCHES "kFreeBSD.*")
  set(FREEBSD TRUE)
elseif(CMAKE_SYSTEM_NAME MATCHES "DragonFly.*|FreeBSD")
  set(FREEBSD TRUE)
endif()

# TODO: check bsdi, NetBSD, OpenBSD, to see if they need the same FreeBSD changes
# 
# elseif(CMAKE_SYSTEM_NAME MATCHES "kNetBSD.*|NetBSD.*")
#   set(NETBSD TRUE)
# elseif(CMAKE_SYSTEM_NAME MATCHES "kOpenBSD.*|OpenBSD.*")
#   set(OPENBSD TRUE)
# elseif(CMAKE_SYSTEM_NAME MATCHES ".*BSDI.*")
#   set(BSDI TRUE)

function(set_static_flags)
  if (NOT APPLE)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
  endif()
endfunction(set_static_flags)

include_directories(src contrib/epee/include external "${CMAKE_BINARY_DIR}/version")

if(APPLE)
  include_directories(SYSTEM /usr/include/malloc)
endif()

set(STATIC ${MSVC} CACHE BOOL "Link libraries statically")

if (UNIX AND NOT APPLE)
  # Note that at the time of this writing the -Wstrict-prototypes flag added below will make this fail
  find_package(Threads)
endif()

if(MSVC)
  add_definitions("/bigobj /MP /W3 /GS- /D_CRT_SECURE_NO_WARNINGS /wd4996 /wd4345 /D_WIN32_WINNT=0x0600 /DWIN32_LEAN_AND_MEAN /DGTEST_HAS_TR1_TUPLE=0 /FIinline_c.h /D__SSE4_1__")
  # set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} /Dinline=__inline")
  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} /STACK:10485760")
  if(STATIC)
    foreach(VAR CMAKE_C_FLAGS_DEBUG CMAKE_CXX_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_CXX_FLAGS_RELEASE)
      string(REPLACE "/MD" "/MT" ${VAR} "${${VAR}}")
    endforeach()
  endif()
  include_directories(SYSTEM src/platform/msc)
else()
  set(ARCH native CACHE STRING "CPU to build for: -march value or default")
  if("${ARCH}" STREQUAL "default")
    set(ARCH_FLAG "")
  else()
    set(ARCH_FLAG "-march=${ARCH}")
  endif()
  set(WARNINGS "-Wall -Wextra -Wpointer-arith -Wundef -Wvla -Wwrite-strings -Werror -Wno-error=extra -Wno-error=deprecated-declarations -Wno-error=sign-compare -Wno-error=strict-aliasing -Wno-error=type-limits -Wno-unused-parameter -Wno-error=unused-variable -Wno-error=undef -Wno-error=uninitialized")
  if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
    set(WARNINGS "${WARNINGS} -Wno-error=mismatched-tags -Wno-error=null-conversion -Wno-overloaded-shift-op-parentheses -Wno-error=shift-count-overflow -Wno-error=tautological-constant-out-of-range-compare -Wno-error=unused-private-field -Wno-error=unneeded-internal-declaration")
  else()
    set(WARNINGS "${WARNINGS} -Wlogical-op -Wno-error=maybe-uninitialized")
  endif()
  # Since gcc 4.9 the LTO format is non-standard (slim), so we need the gcc-specific ar and ranlib binaries
  if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND NOT (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9.0))
    set(CMAKE_AR "gcc-ar")
    set(CMAKE_RANLIB "gcc-ranlib")
  endif()
  if(MINGW)
    set(WARNINGS "${WARNINGS} -Wno-error=unused-value")
    set(MINGW_FLAG "-DWIN32_LEAN_AND_MEAN")
    include_directories(SYSTEM src/platform/mingw)
  else()
    set(MINGW_FLAG "")
  endif()
  set(C_WARNINGS "-Waggregate-return -Wnested-externs -Wold-style-definition -Wstrict-prototypes")
  set(CXX_WARNINGS "-Wno-reorder -Wno-missing-field-initializers")
  try_compile(STATIC_ASSERT_RES "${CMAKE_CURRENT_BINARY_DIR}/static-assert" "${CMAKE_CURRENT_SOURCE_DIR}/utils/test-static-assert.c" COMPILE_DEFINITIONS "-std=c11")
  if(STATIC_ASSERT_RES)
    set(STATIC_ASSERT_FLAG "")
  else()
    set(STATIC_ASSERT_FLAG "-Dstatic_assert=_Static_assert")
  endif()
  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11 -D_GNU_SOURCE ${MINGW_FLAG} ${STATIC_ASSERT_FLAG} ${WARNINGS} ${C_WARNINGS} ${ARCH_FLAG} -maes")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -D_GNU_SOURCE ${MINGW_FLAG} ${WARNINGS} ${CXX_WARNINGS} ${ARCH_FLAG} -maes")
  if(APPLE)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DGTEST_HAS_TR1_TUPLE=0")
  endif()
  if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT (CMAKE_C_COMPILER_VERSION VERSION_LESS 4.8))
    set(DEBUG_FLAGS "-g3 -Og")
  else()
    set(DEBUG_FLAGS "-g3 -O0")
  endif()
  set(RELEASE_FLAGS "-Ofast -DNDEBUG -Wno-unused-variable")
  if(NOT CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
    # There is a clang bug that does not allow to compile code that uses AES-NI intrinsics if -flto is enabled
    set(RELEASE_FLAGS "${RELEASE_FLAGS} -flto")
  endif()
  #if(CMAKE_C_COMPILER_ID STREQUAL "GNU" AND NOT MINGW)
  #  set(RELEASE_FLAGS "${RELEASE_FLAGS} -fno-fat-lto-objects")
  #endif()
  set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} ${DEBUG_FLAGS}")
  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} ${DEBUG_FLAGS}")
  set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} ${RELEASE_FLAGS}")
  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} ${RELEASE_FLAGS}")
  if(STATIC AND NOT APPLE)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
  endif()
endif()

if(STATIC)
  set(Boost_USE_STATIC_LIBS ON)
  set(Boost_USE_STATIC_RUNTIME ON)
endif()
find_package(Boost 1.53 REQUIRED COMPONENTS system filesystem thread date_time chrono regex serialization program_options)
if((${Boost_MAJOR_VERSION} EQUAL 1) AND (${Boost_MINOR_VERSION} EQUAL 54))
  message(SEND_ERROR "Boost version 1.54 is unsupported, more details are available here http://goo.gl/RrCFmA")
endif()
include_directories(SYSTEM ${Boost_INCLUDE_DIRS})
if(MINGW)
  set(Boost_LIBRARIES "${Boost_LIBRARIES};ws2_32;mswsock")
elseif(APPLE)
  set(Boost_LIBRARIES "${Boost_LIBRARIES}")
elseif(NOT MSVC)
  set(Boost_LIBRARIES "${Boost_LIBRARIES};rt;pthread")
endif()

set(COMMIT_ID_IN_VERSION ON CACHE BOOL "Include commit ID in version")
file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/version")
if (NOT COMMIT_ID_IN_VERSION)
  set(VERSION "${VERSION}-unknown")
  configure_file("src/version.h.in" "version/version.h")
  add_custom_target(version ALL)
elseif(DEFINED COMMIT)
  string(REPLACE "." "\\." VERSION_RE "${VERSION}")
  if(NOT REFS MATCHES "(\\(|, )tag: v${VERSION_RE}(\\)|, )")
    set(VERSION "${VERSION}-g${COMMIT}")
  endif()
  configure_file("src/version.h.in" "version/version.h")
  add_custom_target(version ALL)
else()
  find_package(Git QUIET)
  if(Git_FOUND OR GIT_FOUND)
    message(STATUS "Found Git: ${GIT_EXECUTABLE}")
    add_custom_target(version ALL "${CMAKE_COMMAND}" "-D" "VERSION=${VERSION}" "-D" "GIT=${GIT_EXECUTABLE}" "-D" "TO=${CMAKE_BINARY_DIR}/version/version.h" "-P" "src/version.cmake" WORKING_DIRECTORY "${CMAKE_SOURCE_DIR}")
  else()
    message(STATUS "WARNING: Git was not found!")
    set(VERSION "${VERSION}-unknown")
    configure_file("src/version.h.in" "version/version.h")
    add_custom_target(version ALL)
  endif()
endif()

add_subdirectory(external)
add_subdirectory(src)
add_subdirectory(tests)