add preliminary cmake build system

src/CMakeLists.txt

@@ -0,0 +1,49 @@
+# 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.
+
+########################################################################
+# Setup library
+########################################################################
+add_library(rtlsdr SHARED
+    rtl-sdr.c
+    tuner_e4000.c
+    tuner_fc0012.c
+    tuner_fc0013.c
+)
+
+target_link_libraries(rtlsdr
+    ${LIBUSB_LIBRARIES}
+)
+
+set_target_properties(rtlsdr PROPERTIES DEFINE_SYMBOL "rtlsdr_EXPORTS")
+
+########################################################################
+# Install built library files
+########################################################################
+install(TARGETS rtlsdr
+    LIBRARY DESTINATION lib${LIB_SUFFIX} # .so/.dylib file
+    ARCHIVE DESTINATION lib${LIB_SUFFIX} # .lib file
+    RUNTIME DESTINATION bin              # .dll file
+)
+
+########################################################################
+# Build utility
+########################################################################
+add_executable(rtl_sdr main.c)
+target_link_libraries(rtl_sdr rtlsdr ${LIBUSB_LIBRARIES})