#
# Conky, a system monitor, based on torsmo
#
# Please see COPYING for details
#
# Copyright (c) 2005-2018 Brenden Matthews, et. al. (see AUTHORS)
# All rights reserved.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

#set(RELEASE true)

# Set system vars
if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  set(OS_LINUX true)
endif(CMAKE_SYSTEM_NAME MATCHES "Linux")

if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  set(OS_FREEBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")

if(CMAKE_SYSTEM_NAME MATCHES "DragonFly")
  set(OS_DRAGONFLY true)
endif(CMAKE_SYSTEM_NAME MATCHES "DragonFly")

if(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")
  set(OS_OPENBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "OpenBSD")

if(CMAKE_SYSTEM_NAME MATCHES "SunOS")
  set(OS_SOLARIS true)
endif(CMAKE_SYSTEM_NAME MATCHES "SunOS")

if(CMAKE_SYSTEM_NAME MATCHES "NetBSD")
  set(OS_NETBSD true)
endif(CMAKE_SYSTEM_NAME MATCHES "NetBSD")

if(CMAKE_SYSTEM_NAME MATCHES "Haiku")
  set(OS_HAIKU true)
endif(CMAKE_SYSTEM_NAME MATCHES "Haiku")

if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
  set(OS_DARWIN true)
endif(CMAKE_SYSTEM_NAME MATCHES "Darwin")

if(NOT OS_LINUX AND NOT OS_FREEBSD AND NOT OS_OPENBSD AND NOT OS_DRAGONFLY
    AND NOT OS_SOLARIS AND NOT OS_HAIKU AND NOT OS_DARWIN)
  message(FATAL_ERROR "Your platform, '${CMAKE_SYSTEM_NAME}', is not currently supported.  Patches are welcome.")
endif(NOT OS_LINUX AND NOT OS_FREEBSD AND NOT OS_OPENBSD AND NOT OS_DRAGONFLY
  AND NOT OS_SOLARIS AND NOT OS_HAIKU AND NOT OS_DARWIN)

include(FindThreads)
find_package(Threads)

set(conky_libs ${CMAKE_THREAD_LIBS_INIT})
set(conky_includes ${CMAKE_BINARY_DIR})

#
# On Darwin _POSIX_C_SOURCE must be >= __DARWIN_C_FULL for asprintf to be enabled!
# Thus disable this and _LARGEFILE64_SOURCE isnt needed, it is already used on macOS.
#
if(NOT OS_DARWIN)
  add_definitions(-D_LARGEFILE64_SOURCE -D_POSIX_C_SOURCE=200809L) # Standard definitions
  set(CMAKE_REQUIRED_DEFINITIONS
    "${CMAKE_REQUIRED_DEFINITIONS} -D_LARGEFILE64_SOURCE -D_POSIX_C_SOURCE=200809L")
endif(NOT OS_DARWIN)

if(OS_DRAGONFLY)
  set(conky_libs ${conky_libs} -L/usr/pkg/lib)
  set(conky_includes ${conky_includes} -I/usr/pkg/include)
endif(OS_DRAGONFLY)

if(OS_SOLARIS)
  set(conky_libs ${conky_libs} -L/usr/local/lib)
endif(OS_SOLARIS)

# Do version stuff
set(VERSION_MAJOR "1")
set(VERSION_MINOR "10")
set(VERSION_PATCH "9")

find_program(APP_AWK awk)
if(NOT APP_AWK)
  message(FATAL_ERROR "Unable to find program 'awk'")
endif(NOT APP_AWK)

find_program(APP_WC wc)
if(NOT APP_WC)
  message(FATAL_ERROR "Unable to find program 'wc'")
endif(NOT APP_WC)

find_program(APP_DATE date)
if(NOT APP_DATE)
  message(FATAL_ERROR "Unable to find program 'date'")
endif(NOT APP_DATE)

find_program(APP_UNAME uname)
if(NOT APP_UNAME)
  message(FATAL_ERROR "Unable to find program 'uname'")
endif(NOT APP_UNAME)

if(NOT RELEASE)
  find_program(APP_GIT git)
  if(NOT APP_GIT)
    message(FATAL_ERROR "Unable to find program 'git'")
  endif(NOT APP_GIT)
  mark_as_advanced(APP_GIT)
endif(NOT RELEASE)

mark_as_advanced(APP_AWK APP_WC APP_DATE APP_UNAME)

#BUILD_DATE=$(LANG=en_US LC_ALL=en_US LOCALE=en_US date)
#BUILD_ARCH="$(uname -sr) ($(uname -m))"
execute_process(COMMAND ${APP_DATE} RESULT_VARIABLE RETVAL OUTPUT_VARIABLE
  BUILD_DATE OUTPUT_STRIP_TRAILING_WHITESPACE)
execute_process(COMMAND ${APP_UNAME} -srm RESULT_VARIABLE RETVAL
  OUTPUT_VARIABLE BUILD_ARCH OUTPUT_STRIP_TRAILING_WHITESPACE)

if(RELEASE)
  set(VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}")
else(RELEASE)
  set(VERSION "${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH}_pre${COMMIT_COUNT}")
endif(RELEASE)

set(COPYRIGHT "Copyright Brenden Matthews, et al, 2005-2018")

macro(AC_SEARCH_LIBS FUNCTION_NAME INCLUDES TARGET_VAR)
  if("${TARGET_VAR}" MATCHES "^${TARGET_VAR}$")
    unset(AC_SEARCH_LIBS_TMP CACHE)
    check_symbol_exists(${FUNCTION_NAME} ${INCLUDES} AC_SEARCH_LIBS_TMP)
    if(${AC_SEARCH_LIBS_TMP})
      set(${TARGET_VAR} "" CACHE INTERNAL "Library containing ${FUNCTION_NAME}")
    else(${AC_SEARCH_LIBS_TMP})
      foreach(LIB ${ARGN})
        unset(AC_SEARCH_LIBS_TMP CACHE)
        unset(AC_SEARCH_LIBS_FOUND CACHE)
        find_library(AC_SEARCH_LIBS_TMP ${LIB})
        check_library_exists(${LIB} ${FUNCTION_NAME} ${AC_SEARCH_LIBS_TMP}
          AC_SEARCH_LIBS_FOUND)
        if(${AC_SEARCH_LIBS_FOUND})
          set(${TARGET_VAR} ${AC_SEARCH_LIBS_TMP} CACHE INTERNAL
            "Library containing ${FUNCTION_NAME}")
          break()
        endif(${AC_SEARCH_LIBS_FOUND})
      endforeach(LIB)
    endif(${AC_SEARCH_LIBS_TMP})
  endif("${TARGET_VAR}" MATCHES "^${TARGET_VAR}$")
endmacro(AC_SEARCH_LIBS)