add preliminary cmake build system

CMakeLists.txt

@@ -0,0 +1,85 @@
+# Copyright 2012 OSMOCOM Project
+#
+# This file is part of rtl-sdr
+#
+# GNU Radio 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, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+
+
+########################################################################
+# Project setup
+########################################################################
+cmake_minimum_required(VERSION 2.6)
+project(rtlsdr 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)
+
+########################################################################
+# Compiler specific setup
+########################################################################
+if(CMAKE_COMPILER_IS_GNUCXX AND NOT WIN32)
+    #http://gcc.gnu.org/wiki/Visibility
+    add_definitions(-fvisibility=hidden)
+endif()
+
+########################################################################
+# Find build dependencies
+########################################################################
+find_package(PkgConfig)
+find_package(LibUSB)
+
+if(NOT LIBUSB_FOUND)
+    message(FATAL_ERROR "LibUSB 1.0 required to compile rtl-sdr")
+endif()
+
+########################################################################
+# Setup the include and linker paths
+########################################################################
+include_directories(
+    ${CMAKE_SOURCE_DIR}/include
+    ${LIBUSB_INCLUDE_DIR}
+)
+
+#link_directories(
+#    ...
+#)
+
+# Set component parameters
+#set(INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}/include CACHE INTERNAL "" FORCE)
+
+########################################################################
+# 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
+########################################################################
+add_subdirectory(include)
+add_subdirectory(src)