cmake_minimum_required(VERSION 2.6)

project(votca-tools)

set(PROJECT_VERSION "1.2.4")
string(REGEX REPLACE "^[1-9]+\\.([1-9]+).*$" "\\1" SOVERSION "${PROJECT_VERSION}")
if (NOT ${SOVERSION} MATCHES "[1-9]+")
  message(FATAL_ERROR "Could not determind SOVERSION from ${PROJECT_VERSION}")
endif (NOT ${SOVERSION} MATCHES "[1-9]+")

# Cmake modules/macros are in a subdirectory to keep this file cleaner
set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/CMakeModules)

if(NOT CMAKE_BUILD_TYPE)
  #release comes with -O3 by default
  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel." FORCE)
endif(NOT CMAKE_BUILD_TYPE)

enable_language(CXX)


######################################################################
# compiler tests
# these need ot be done early (before further tests).
#####################################################################

include(CheckCXXCompilerFlag)

########################################################################
# User input options                                                   #
########################################################################
option(BUILD_SHARED_LIBS "Build shared libs" ON)
if (NOT DEFINED LIB)
  set(LIB "lib")
endif(NOT DEFINED LIB)
if (NOT DEFINED MAN)
  set(MAN "share/man")
endif(NOT DEFINED MAN)
if (NOT DEFINED DATA)
  set(DATA "share/votca")
endif(NOT DEFINED DATA)


#this has to be the first include directive
include_directories(${CMAKE_SOURCE_DIR}/include)

########################################################################
#Find external packages
########################################################################
find_package(Mercurial)
find_package(Threads REQUIRED)
set(THREAD_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
find_package(TXT2TAGS)

########################################################################
# Basic system tests (standard libraries, headers, functions, types)   #
########################################################################
include(CheckIncludeFile)
foreach(HEADER assert.h math.h stdio.h stdlib.h string.h)
  check_include_file(${HEADER} FOUND_${HEADER})
  if(NOT FOUND_${HEADER})
    message(FATAL_ERROR "Could not find needed header - ${HEADER}")
  endif(NOT FOUND_${HEADER})
endforeach(HEADER)

include(CheckIncludeFileCXX)
foreach(HEADER cmath fstream functional iostream limits list map ostream sstream stack stdexcept string vector)
  check_include_file_cxx(${HEADER} FOUND_${HEADER})
  if(NOT FOUND_${HEADER})
    message(FATAL_ERROR "Could not find needed header - ${HEADER}")
  endif(NOT FOUND_${HEADER})
endforeach(HEADER)

set(MATH_LIBRARIES "m" CACHE STRING "math library")
mark_as_advanced( MATH_LIBRARIES )
include(CheckLibraryExists)
foreach(FUNC sqrt)
  check_library_exists(${MATH_LIBRARIES} ${FUNC} "" FOUND_${FUNC}_${MATH_LIBRARIES})
  if(NOT FOUND_${FUNC}_${MATH_LIBRARIES})
    message(FATAL_ERROR "Could not find needed math function - ${FUNC}")
  endif(NOT FOUND_${FUNC}_${MATH_LIBRARIES})
endforeach(FUNC)

######################################
# Include the following subdirectory # 
######################################
add_subdirectory(src)
add_subdirectory(include/votca/tools)
add_subdirectory(scripts)
add_subdirectory(share/man)
add_subdirectory(share/doc)

configure_file(${CMAKE_MODULE_PATH}/cmake_uninstall.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake IMMEDIATE @ONLY)
add_custom_target(uninstall COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)
