#
# Copyright 2012-2013 The libLTE Developers. See the
# COPYRIGHT file at the top-level directory of this distribution.
#
# This file is part of the libLTE library.
#
# libLTE is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 3 of
# the License, or (at your option) any later version.
#
# libLTE 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 Lesser General Public License for more details.
#
# A copy of the GNU Lesser General Public License can be found in
# the LICENSE file in the top-level directory of this distribution
# and at http://www.gnu.org/licenses/.
#


########################################################################
# Find Dependencies  
########################################################################
include(CheckFunctionExistsMath)

FIND_PACKAGE(FFTW3F REQUIRED) # TODO: distribute kissfft instead
INCLUDE_DIRECTORIES(${FFTW3F_INCLUDE_DIRS})

IF(${DISABLE_VOLK})
	IF(${DISABLE_VOLK} EQUAL 0)
		FIND_PACKAGE(Volk)
	ELSE(${DISABLE_VOLK} EQUAL 0)
		MESSAGE(STATUS "VOLK library disabled (DISABLE_VOLK=1)")
	ENDIF(${DISABLE_VOLK} EQUAL 0)
ELSE(${DISABLE_VOLK})
	FIND_PACKAGE(Volk)
ENDIF(${DISABLE_VOLK})

########################################################################
# Recurse subdirectories and compile all source files into the same lib  
########################################################################

FILE(GLOB modules *) 
SET(SOURCES_ALL "")
FOREACH (_module ${modules})
	IF(IS_DIRECTORY ${_module})
		FILE(GLOB_RECURSE tmp "${_module}/src/*.c")
		LIST(APPEND SOURCES_ALL ${tmp})		
	ENDIF(IS_DIRECTORY ${_module})
ENDFOREACH()

ADD_LIBRARY(lte SHARED ${SOURCES_ALL})
TARGET_LINK_LIBRARIES(lte m ${FFTW3F_LIBRARIES})
INSTALL(TARGETS lte DESTINATION ${LIBRARY_DIR})
LIBLTE_SET_PIC(lte)

IF(VOLK_FOUND)
	INCLUDE_DIRECTORIES(${VOLK_INCLUDE_DIRS})
	SET_TARGET_PROPERTIES(lte PROPERTIES COMPILE_DEFINITIONS "${VOLK_DEFINITIONS}")
	TARGET_LINK_LIBRARIES(lte ${VOLK_LIBRARIES})
	MESSAGE(STATUS "   Compiling with VOLK SIMD library.")	
ELSE(VOLK_FOUND)
	MESSAGE(STATUS "   VOLK SIMD library NOT found. Using generic implementation.")
ENDIF(VOLK_FOUND)


########################################################################
# Recurse subdirectories and find all directories with a CMakeLists.txt file in it  
########################################################################

FILE(GLOB_RECURSE cmakefiles CMakeLists.txt) 
FOREACH (_file ${cmakefiles})
	GET_FILENAME_COMPONENT(dir ${_file} PATH)
	IF (NOT ${dir} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
		ADD_SUBDIRECTORY(${dir})
	ENDIF ()
ENDFOREACH()