move externals to external

external/libhackrf/CMakeLists.txt

@@ -0,0 +1,32 @@
+project(hackrf)
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
+
+find_package(LibUSB)
+
+set(hackrf_SOURCES
+    ${LIBHACKRFSRC}/libhackrf/src/hackrf.c
+)
+
+set(hackrf_HEADERS
+    ${LIBHACKRFSRC}/libhackrf/src/hackrf.h
+)
+
+include_directories(
+    .
+    ${CMAKE_CURRENT_BINARY_DIR}
+    ${LIBUSB_INCLUDE_DIR}    
+    ${LIBHACKRFSRC}/libhackrf/src
+)
+
+add_definitions(-DQT_SHARED)
+
+add_library(hackrf SHARED
+    ${hackrf_SOURCES}
+)
+
+target_link_libraries(hackrf
+    ${LIBUSB_LIBRARIES}
+)
+
+install(TARGETS hackrf DESTINATION ${INSTALL_LIB_DIR})