gnss-sdr/CMakeLists.txt

# Copyright (C) 2010-2013  (see AUTHORS file for a list of contributors)
#
# This file is part of GNSS-SDR.
#
# GNSS-SDR 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.
#
# GNSS-SDR 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 GNSS-SDR. If not, see <http://www.gnu.org/licenses/>.
#

########################################################################
if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
    message(FATAL_ERROR "Prevented in-tree build. This is bad practice. Try 'cd build && cmake ../' ")
endif(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})

########################################################################
# Project setup
########################################################################
cmake_minimum_required(VERSION 2.8)
project(gnss-sdr CXX C)

#select the release build type by default to get optimization flags
if(NOT CMAKE_BUILD_TYPE)
   set(CMAKE_BUILD_TYPE "Release")
   message(STATUS "Build type not specified: defaulting to release.")
endif(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE ${CMAKE_BUILD_TYPE} CACHE STRING "")

list(APPEND CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake/Modules)
list(APPEND CMAKE_MODULE_PATH ${gnss-sdr_project_SOURCE_DIR}/cmake/Modules)

# Set the version information here
set(VERSION_INFO_MAJOR_VERSION 0)
set(VERSION_INFO_API_COMPAT    2)
set(VERSION_INFO_MINOR_VERSION 0.svn)
set(VERSION ${VERSION_INFO_MAJOR_VERSION}.${VERSION_INFO_API_COMPAT}.${VERSION_INFO_MINOR_VERSION})

# Append -O2 optimization flag for Debug builds
set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O2")

option(INSTALL_GNURADIO "Install GNU Radio and all its dependencies" OFF)

file(RELATIVE_PATH RELATIVE_CMAKE_CALL ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})


########################################################################
# Environment setup
########################################################################
include(ExternalProject)

set(OS_IS_MACOSX "")
set(OS_IS_LINUX "")
if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
     set(OperatingSystem "Linux")
     set(OS_IS_LINUX TRUE)
endif(${CMAKE_SYSTEM_NAME} MATCHES "Linux")

if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
     set(OperatingSystem "Mac OS X")
     set(OS_IS_MACOSX TRUE)
     exec_program(uname ARGS -v  OUTPUT_VARIABLE DARWIN_VERSION)
     string(REGEX MATCH "[0-9]+" DARWIN_VERSION ${DARWIN_VERSION})
     if(${DARWIN_VERSION} MATCHES "13")
         set(MACOSX_MAVERICKS TRUE)
         set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LANGUAGE_STANDARD "c++11")
         set(CMAKE_XCODE_ATTRIBUTE_CLANG_CXX_LIBRARY "libc++")
         set(CMAKE_XCODE_ATTRIBUTE_GCC_VERSION="com.apple.compilers.llvm.clang.1_0")
     endif(${DARWIN_VERSION} MATCHES "13")
endif(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")


########################################################################
# Find OpenCL installation
########################################################################
find_package(OpenCL)


################################################################################
# Googletest - http://code.google.com/p/googletest/
################################################################################
enable_testing()
set(GTEST_DIR $ENV{GTEST_DIR})
if(GTEST_DIR)
     message("GTEST root folder at ${GTEST_DIR}")
else()
     message (" Googletest has not been found because the variable ")
     message (" GTEST_DIR is not defined.")
     message (" Googletest will be downloaded and built automatically ")
     message (" when doing 'make'. ")
endif(GTEST_DIR)



################################################################################
# Boost - http://www.boost.org
################################################################################

if(UNIX AND EXISTS "/usr/lib64")
    list(APPEND BOOST_LIBRARYDIR "/usr/lib64") #fedora 64-bit fix
endif(UNIX AND EXISTS "/usr/lib64")
set(Boost_ADDITIONAL_VERSIONS
    "1.42.0" "1.42" "1.43.0" "1.43" "1.44.0" "1.44"
    "1.45.0" "1.45" "1.46.0" "1.46"                 "1.48.0" "1.48" "1.49.0" "1.49"
    "1.50.0" "1.50" "1.51.0" "1.51"                 "1.53.0" "1.53" "1.54.0" "1.54"
    "1.55.0" "1.55" "1.56.0" "1.56" "1.57.0" "1.57" "1.58.0" "1.58" "1.59.0" "1.59"
    "1.60.0" "1.60" "1.61.0" "1.61" "1.62.0" "1.62" "1.63.0" "1.63" "1.64.0" "1.64"
    "1.65.0" "1.65" "1.66.0" "1.66" "1.67.0" "1.67" "1.68.0" "1.68" "1.69.0" "1.69"
)
set(Boost_USE_MULTITHREAD ON)
set(Boost_USE_STATIC_LIBS OFF)
find_package(Boost COMPONENTS date_time system filesystem thread serialization REQUIRED) 
if(NOT Boost_FOUND)
     message(FATAL_ERROR "Fatal error: Boost (version >=1.42.0) required.")
endif(NOT Boost_FOUND)


################################################################################
# GNU Radio - http://gnuradio.org/redmine/projects/gnuradio/wiki
################################################################################

set(GR_REQUIRED_COMPONENTS RUNTIME PMT BLOCKS UHD ANALOG FILTER FFT VOLK FEC TRELLIS)

find_package(Gnuradio "3.7.0")
find_package(Volk)
find_package(UHD)

if(NOT GNURADIO_BLOCKS_FOUND)
    message("*** gnuradio-blocks 3.7 or later is required to build gnss-sdr")
endif()
if(NOT UHD_FOUND)
    message("*** UHD is required to build gnss-sdr")
endif()
if(NOT GNURADIO_UHD_FOUND)
    message("*** gnuradio-uhd 3.7 or later is required to build gnss-sdr")
endif()
if(NOT GNURADIO_FILTER_FOUND)
    message("*** gnuradio-filter 3.7 or later is required to build gnss-sdr")
endif()
if(NOT GNURADIO_FFT_FOUND)
    message("*** gnuradio-fft 3.7 or later is required to build gnss-sdr")
endif()
if(NOT VOLK_FOUND)
    message("*** VOLK is required to build gnss-sdr")
endif()
if(NOT GNURADIO_ANALOG_FOUND)
    message("*** gnuradio-analog 3.7 or later is required to build gnss-sdr")
endif()
if(NOT GNURADIO_FEC_FOUND)
    message("*** gnuradio-fec 3.7 or later is required to build gnss-sdr")
endif()
if(NOT GNURADIO_TRELLIS_FOUND)
    message("*** gnuradio-trellis 3.7 or later is required to build gnss-sdr")
endif()


if(NOT GNURADIO_RUNTIME_FOUND)
   message(STATUS "cmake cannot find GNU Radio >= 3.7")
   if(OS_IS_LINUX)
       message("Go to http://gnuradio.org/redmine/projects/pybombs/wiki")
       message("and follow the instructions to install GNU Radio in your system.")
       message(FATAL_ERROR "GNU Radio 3.7 or later is required to build gnss-sdr")
   endif(OS_IS_LINUX)
   if(OS_IS_MACOSX)
       message("You can install it easily via Macports.")
       message("Open a terminal and type:")
       message("sudo port install gnuradio ")
       message(FATAL_ERROR "GNU Radio 3.7 or later is required to build gnss-sdr")
   endif(OS_IS_MACOSX)
endif(NOT GNURADIO_RUNTIME_FOUND)



################################################################################
# gflags - http://code.google.com/p/gflags/
################################################################################
set(LOCAL_GFLAGS false CACHE STRING "GFlags installed on the system")
set(GFlags_ROOT_DIR false)
find_package(GFlags)

if (NOT GFlags_FOUND)
     message (" gflags library has not been found.")
     message (" gflags will be downloaded and built automatically ")
     message (" when doing 'make'. ")
     set(gflags_RELEASE 2.0 CACHE STRING "Local gflags release")
     set(gflags_MD5 "5fd4554d2ba84bf222a2fec0870d28df")
     
     ExternalProject_Add(
          gflags-${gflags_RELEASE}
          PREFIX ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}
          URL http://gflags.googlecode.com/files/gflags-${gflags_RELEASE}.zip
          DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/download/gflags-${gflags_RELEASE}
          URL_MD5 ${gflags_MD5}
          SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/gflags/gflags-${gflags_RELEASE}
          BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}
          CONFIGURE_COMMAND <SOURCE_DIR>/configure --prefix=${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}
          BUILD_COMMAND make
          UPDATE_COMMAND ""
          PATCH_COMMAND ""
          INSTALL_COMMAND ""
     )

     set(GFlags_INCLUDE_DIRS 
          ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}/src CACHE PATH "Local Gflags headers"      
     )
     set(GFlags_LIBS 
          ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}/.libs/${CMAKE_FIND_LIBRARY_PREFIXES}gflags.a
     )
     set(GFlags_ROOT_DIR ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE} CACHE PATH "GFlags root folder" FORCE)
     file(GLOB GFlags_SHARED_LIBS "${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}/.libs/${CMAKE_FIND_LIBRARY_PREFIXES}gflags${CMAKE_SHARED_LIBRARY_SUFFIX}*")
     set(GFlags_LIBRARY gflags-${gflags_RELEASE})
     set(gflags gflags-${gflags_RELEASE})
     set(GFlags_LIBRARY_PATH  ${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}/.libs )
     link_directories(${GFlags_LIBRARY_PATH})
     set(GFlags_lib ${GFlags_LIBS}  CACHE FILEPATH "Local Gflags library")
     set(GFlags_LIBRARY_PATH ${GFlags_LIBS})
     set(LOCAL_GFLAGS true CACHE STRING "GFlags downloaded and build automatically" FORCE)
endif(NOT GFlags_FOUND)



################################################################################
# glog - http://code.google.com/p/google-glog/
################################################################################

find_package(GLOG)
if (NOT GLOG_FOUND OR LOCAL_GFLAGS)
     message (" glog library has not been found")
     if(NOT GFlags_FOUND)
          message(" or it is likely not linked to gflags.")
     endif(NOT GFlags_FOUND)
     message (" glog will be downloaded and built automatically ")
     message (" when doing 'make'. ")
     set(glog_RELEASE 0.3.3)
     set(glog_MD5 "a6fd2c22f8996846e34c763422717c18")
     if(LOCAL_GFLAGS)
          file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/tmp/configure_with_gflags
"#!/bin/sh
export CPPFLAGS=-I${GFlags_INCLUDE_DIRS}
export LDFLAGS=-L${CMAKE_CURRENT_BINARY_DIR}/gflags-${gflags_RELEASE}/.libs
export LIBS=${GFlags_SHARED_LIBS}
../../thirdparty/glog/glog-${glog_RELEASE}/configure")
          file(COPY ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/tmp/configure_with_gflags
               DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}
               FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ
                                GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
     else(LOCAL_GFLAGS)
     file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/tmp/configure_with_gflags
 "#!/bin/sh
 export CPPFLAGS=-I${GFlags_INCLUDE_DIRS}
 export LDFLAGS=-L${GFlags_LIBRARY_DIRS}
 export LIBS=${GFlags_LIBS}
 ../../thirdparty/glog/glog-${glog_RELEASE}/configure")
          file(COPY ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/tmp/configure_with_gflags
               DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}
               FILE_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ
                                GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
     endif(LOCAL_GFLAGS)

     set(GLOG_CONFIGURE ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/configure_with_gflags)   
     ExternalProject_Add(
          glog-${glog_RELEASE}
          PREFIX ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}
          URL http://google-glog.googlecode.com/files/glog-${glog_RELEASE}.tar.gz
          DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/download/glog-${glog_RELEASE}
          URL_MD5 ${glog_MD5}
          SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/glog/glog-${glog_RELEASE}
          BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}
          CONFIGURE_COMMAND ${GLOG_CONFIGURE} --prefix=<INSTALL_DIR> 
          BUILD_COMMAND make
          UPDATE_COMMAND ""
          PATCH_COMMAND ""
          INSTALL_COMMAND ""
     )
     # Set up variables
     set(GLOG_INCLUDE_DIRS 
          ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/glog/glog-${glog_RELEASE}/src/ 
          ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/src
     )
     set(GLOG_LIBRARIES 
          ${CMAKE_CURRENT_BINARY_DIR}/glog-${glog_RELEASE}/.libs/${CMAKE_FIND_LIBRARY_PREFIXES}glog.a 
     )
     set(LOCAL_GLOG true)
endif(NOT GLOG_FOUND OR LOCAL_GFLAGS)



################################################################################
# GPerftools - http://code.google.com/p/gperftools/
################################################################################

set(GCC_GPERFTOOLS_FLAGS "")
find_package(Gperftools)
if ( NOT GPERFTOOLS_FOUND )
  message("The optional library GPerftools has not been found.")
else( NOT GPERFTOOLS_FOUND )
  message ( "GPerftools library found." )
  link_libraries(profiler tcmalloc)
endif( NOT GPERFTOOLS_FOUND )
list(APPEND CMAKE_CXX_FLAGS ${GCC_GPERFTOOLS_FLAGS})




################################################################################
# Doxygen - http://www.stack.nl/~dimitri/doxygen/index.html
################################################################################

find_package(Doxygen)
if(DOXYGEN_FOUND)
     message( "Doxygen found.")
     message(STATUS "You can build the documentation with 'make doc'." )
     message(STATUS "When done, point your browser to ${CMAKE_SOURCE_DIR}/html/index.html")
     set(HAVE_DOT ${DOXYGEN_DOT_FOUND})
     file(TO_NATIVE_PATH ${CMAKE_SOURCE_DIR} top_srcdir)
     file(TO_NATIVE_PATH ${CMAKE_BINARY_DIR} top_builddir)
     find_package(LATEX)
     if (PDFLATEX_COMPILER)
          set(GENERATE_PDF_DOCUMENTATION "YES")
          set(GNSSSDR_USE_MATHJAX "NO")
     else(PDFLATEX_COMPILER)
          set(GENERATE_PDF_DOCUMENTATION "NO")
          set(GNSSSDR_USE_MATHJAX "YES")
     endif(PDFLATEX_COMPILER)
     configure_file(${CMAKE_SOURCE_DIR}/docs/doxygen/Doxyfile.in
          ${CMAKE_SOURCE_DIR}/docs/doxygen/Doxyfile
          @ONLY
     )
     add_custom_target(doc
          ${DOXYGEN_EXECUTABLE} ${CMAKE_SOURCE_DIR}/docs/doxygen/Doxyfile
          WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
          COMMENT "Generating API documentation with Doxygen." VERBATIM
     )
     if(LATEX_COMPILER)
          message(STATUS "'make pdfmanual' will generate a manual at ${CMAKE_SOURCE_DIR}/docs/GNSS-SDR_manual.pdf")         
          add_custom_target(pdfmanual
               COMMAND ${CMAKE_MAKE_PROGRAM}
               COMMAND ${CMAKE_COMMAND} -E copy refman.pdf ${CMAKE_SOURCE_DIR}/docs/GNSS-SDR_manual.pdf
               COMMAND ${CMAKE_MAKE_PROGRAM} clean
               DEPENDS doc
               WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}/docs/latex
               COMMENT "Generating PDF manual with Doxygen." VERBATIM
          )
     endif(LATEX_COMPILER)
     message(STATUS "'make doc-clean' will clean the documentation.")
     add_custom_target(doc-clean
          COMMAND ${CMAKE_COMMAND} -E remove_directory ${CMAKE_SOURCE_DIR}/docs/html
          COMMAND ${CMAKE_COMMAND} -E remove_directory ${CMAKE_SOURCE_DIR}/docs/latex
          COMMAND ${CMAKE_COMMAND} -E remove ${CMAKE_SOURCE_DIR}/docs/GNSS-SDR_manual.pdf
          COMMENT "Cleaning documentation." VERBATIM
     )
else(DOXYGEN_FOUND)
     message( "Doxygen has not been found in your system.")
     message( "You can get nice code documentation by using it!")
     message( "Get it from http://www.stack.nl/~dimitri/doxygen/index.html")
endif(DOXYGEN_FOUND)



################################################################################
# Armadillo - http://arma.sourceforge.net/
################################################################################

if(OS_IS_LINUX)
    find_library(LAPACK lapack)
    if(NOT LAPACK)
        message(" The LAPACK library has not been found.")
        message(" You can try to install it by typing:")
        message(" sudo apt-get install liblapack-dev")
        message(FATAL_ERROR "LAPACK is required to build gnss-sdr")
    endif(NOT LAPACK)
    find_library(BLAS blas)
    if(NOT BLAS)
        message(" The BLAS library has not been found.")
        message(" You can try to install it by typing:")
        message(" sudo apt-get install libblas-dev")
        message(FATAL_ERROR "BLAS is required to build gnss-sdr")
    endif(NOT BLAS)
    find_library(GFORTRAN NAMES gfortran
                 PATHS /usr/lib
                       /usr/local/lib
                       /usr/lib/gcc/x86_64-linux-gnu
                       /usr/lib/gcc/i686-linux-gnu
                       /usr/lib/gcc/i386-linux-gnu
                       /usr/lib/gcc/x86_64-linux-gnu/4.7
                       /usr/lib/gcc/i686-linux-gnu/4.7
                       /usr/lib/gcc/x86_64-linux-gnu/4.8
                       /usr/lib/gcc/i686-linux-gnu/4.8
                )
    if(NOT GFORTRAN)
        message(" The gfortran library has not been found.")
        message(" You can try to install it by typing:")
        message(" sudo apt-get install gfortran")
        message(FATAL_ERROR "gfortran is required to build gnss-sdr")
    endif(NOT GFORTRAN)
endif(OS_IS_LINUX)

find_package(Armadillo)
if(NOT ARMADILLO_FOUND)
     message (" Armadillo has not been found.")
     message (" Armadillo will be downloaded and built automatically ")
     message (" when doing 'make'. ")
     set(armadillo_RELEASE 3.920.2)
     set(armadillo_MD5 "3d0396513e2802c08152f50e18b4a1cd")
     if(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/download/armadillo-${armadillo_RELEASE}/armadillo-${armadillo_RELEASE}.tar.gz)
          set(ARMADILLO_PATCH_FILE ${CMAKE_CURRENT_BINARY_DIR}/armadillo-${armadillo_RELEASE}/armadillo_no.patch)
          file(WRITE ${ARMADILLO_PATCH_FILE} "")
     else(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/download/armadillo-${armadillo_RELEASE}/armadillo-${armadillo_RELEASE}.tar.gz)
          set(ARMADILLO_PATCH_FILE ${CMAKE_CURRENT_BINARY_DIR}/armadillo-${armadillo_RELEASE}/armadillo_staticlib.patch)
          file(WRITE ${ARMADILLO_PATCH_FILE}
"35c35
< set(ARMA_USE_WRAPPER true )
---
> set(ARMA_USE_WRAPPER false)
323c323
< add_library( armadillo SHARED src/wrap_libs )
---
> add_library( armadillo STATIC src/wrap_libs )
")                     
     endif(EXISTS ${CMAKE_CURRENT_BINARY_DIR}/download/armadillo-${armadillo_RELEASE}/armadillo-${armadillo_RELEASE}.tar.gz)
     ExternalProject_Add(
          armadillo-${armadillo_RELEASE}
          PREFIX ${CMAKE_CURRENT_BINARY_DIR}/armadillo-${armadillo_RELEASE}
          URL http://sourceforge.net/projects/arma/files/armadillo-${armadillo_RELEASE}.tar.gz
          DOWNLOAD_DIR ${CMAKE_CURRENT_BINARY_DIR}/download/armadillo-${armadillo_RELEASE}
          URL_MD5 ${armadillo_MD5}    
          PATCH_COMMAND patch -N <BINARY_DIR>/CMakeLists.txt ${ARMADILLO_PATCH_FILE}  
          BUILD_IN_SOURCE 1
          BUILD_COMMAND make
          UPDATE_COMMAND ""
          INSTALL_COMMAND ""
     )
     # Set up variables
     ExternalProject_Get_Property(armadillo-${armadillo_RELEASE} binary_dir)
     set(ARMADILLO_INCLUDE_DIRS ${binary_dir}/include )     
     find_library(lapack NAMES lapack HINTS /usr/lib /usr/local/lib /usr/lib64)
     find_library(blas NAMES blas HINTS /usr/lib /usr/local/lib /usr/lib64)
     set(ARMADILLO_LIBRARIES ${binary_dir}/${CMAKE_FIND_LIBRARY_PREFIXES}armadillo.a ${lapack} ${blas} gfortran)
     set(LOCAL_ARMADILLO true)
     # Save a copy at the thirdparty folder
     file(COPY ${CMAKE_CURRENT_BINARY_DIR}/armadillo-${armadillo_RELEASE}
          DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/armadillo
     )
endif(NOT ARMADILLO_FOUND)



###############################################################################
# OpenCL
###############################################################################
find_package(OpenCL)
if(NOT OPENCL_FOUND)
    message(STATUS "Processing blocks using OpenCL will not be built.")
endif(NOT OPENCL_FOUND)



################################################################################
# OpenSSL - http://www.openssl.org
################################################################################
find_package(OpenSSL)
if(NOT OPENSSL_FOUND)
    message(" The OpenSSL library has not been found.")
    message(" You can try to install it by typing:")
    if(OS_IS_LINUX)       
        message(" sudo apt-get install libssl-dev")
    endif(OS_IS_LINUX) 
    if(OS_IS_MACOSX)
        message(" sudo port install openssl")
    endif(OS_IS_MACOSX)
    message(FATAL_ERROR "OpenSSL libraries are required to build gnss-sdr")
endif(NOT OPENSSL_FOUND)


################################################################################
# Setup of optional drivers
################################################################################
if( $ENV{GN3S_DRIVER} )
    message( "GN3S_DRIVER variable found." )
    # copy firmware to install folder
    # Build project gr-gn3s
else( $ENV{GN3S_DRIVER} )
    if( GN3S_DRIVER )
       message("GN3S driver will be compiled")
    else( GNSS_DRIVER )
       message( "GN3S_DRIVER is not defined." )
       message( "Define it with 'export GN3S_DRIVER=1' to add support for the GN3S dongle." )
    endif( GN3S_DRIVER )
endif($ENV{GN3S_DRIVER} )

if( $ENV{RTLSDR_DRIVER} )
    message( "RTLSDR_DRIVER variable found." )
    # find libosmosdr (done in src/algorithms/signal_sources/adapters)
    # find gr-osmosdr (done in src/algorithms/signal_sources/adapters)
endif($ENV{RTLSDR_DRIVER} )



########################################################################
# Set compiler flags
########################################################################

# Enable C++11 support in GCC
# For "-std=c++0x"  GCC's support for C++11 see http://gcc.gnu.org/projects/cxx0x.html
if(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
     set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -std=c++0x")
endif(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
    set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -std=c++11 -stdlib=libc++ -Wno-c++11-narrowing") 
endif(CMAKE_CXX_COMPILER_ID MATCHES "Clang")

# Add warning flags 
# For "-Wall" see http://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -Wall")

# Processor-architecture related flags
# See http://gcc.gnu.org/onlinedocs/gcc/i386-and-x86_002d64-Options.html#i386-and-x86_002d64-Options
# Change to '-mtune=generic' when building for distribution
if(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
     if(OS_IS_MACOSX)
         set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -march=corei7 -mfpmath=sse")
     else(OS_IS_MACOSX)
         set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -march=native -mfpmath=sse")
     endif(OS_IS_MACOSX)
endif(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)

if(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
    #http://gcc.gnu.org/wiki/Visibility
    add_definitions(-fvisibility=hidden)
endif()

# Set GPerftools related flags if it is available
# See http://gperftools.googlecode.com/svn/trunk/README
if(GPERFTOOLS_FOUND)
     if(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
          set(MY_CXX_FLAGS "${MY_CXX_FLAGS} -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-free")       
     endif(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
endif(GPERFTOOLS_FOUND)

# Detect 64-bits machine
if( CMAKE_SIZEOF_VOID_P EQUAL 8 )
     # message("64-bits architecture detected.") 
     #set(MY_CXX_FLAGS "${MY_CXX_FLAGS}  ...")
     set(ARCH_64BITS TRUE)
     # link_libraries(pthread) # Needed by Fedora 18
endif( CMAKE_SIZEOF_VOID_P EQUAL 8 )

list(APPEND CMAKE_CXX_FLAGS ${MY_CXX_FLAGS})


########################################################################
# Create uninstall target
########################################################################
configure_file(
    ${CMAKE_SOURCE_DIR}/cmake/cmake_uninstall.cmake.in
    ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake
@ONLY)

add_custom_target(uninstall
    ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake
)


########################################################################
# Add subdirectories (in order of deps)
########################################################################
add_subdirectory(src)