am7xxx: simplify one return path in am7xxx_init()

[libam7xxx.git] / examples / CMakeLists.txt

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index 234e666..f076b19 100644 (file)
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,35 +1,76 @@
-add_definitions("-D_POSIX_C_SOURCE=2") # for getopt()
-add_definitions("-D_POSIX_SOURCE") # for sigaction
-add_definitions("-D_BSD_SOURCE") # for strdup
+include(CheckSymbolExists)
+add_definitions("-D_POSIX_C_SOURCE=200809L") # for getopt(), sigaction(), and strdup()
 
 include_directories(${CMAKE_SOURCE_DIR}/src/)
 
 # Build a test app that sends a single picture
-add_executable(picoproj picoproj.c)
-target_link_libraries(picoproj am7xxx)
-install(TARGETS picoproj
-  DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
+option(BUILD_PICOPROJ "Build a test app that sends a single picture" TRUE)
+if(BUILD_PICOPROJ)
+  add_executable(picoproj picoproj.c)
+  target_link_libraries(picoproj am7xxx)
+  install(TARGETS picoproj
+    DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
+endif()
 
 # Build a more complete example
-find_package(FFmpeg REQUIRED)
-
-include_directories(${FFMPEG_LIBAVDEVICE_INCLUDE_DIRS})
-include_directories(${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
-include_directories(${FFMPEG_LIBSWSCALE_INCLUDE_DIRS})
-
-# xcb is used to retrieve the full screen dimensions when using x11grab
-# as input format
-find_package(XCB)
-if (XCB_FOUND)
-  add_definitions("${LIBXCB_DEFINITIONS} -DHAVE_XCB")
-  include_directories(${LIBXCB_INCLUDE_DIRS})
+option(BUILD_AM7XXX-PLAY "Build a more complete example: am7xxx-play" TRUE)
+if(BUILD_AM7XXX-PLAY)
+  find_package(FFmpeg REQUIRED)
+  set(CMAKE_REQUIRED_LIBRARIES ${FFMPEG_LIBRARIES})
+  set(CMAKE_REQUIRED_INCLUDES ${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
+  check_symbol_exists(avformat_open_input
+    "${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS}/libavformat/avformat.h"
+    HAVE_AVFORMAT_OPEN_INPUT)
+  if(NOT HAVE_AVFORMAT_OPEN_INPUT)
+    message(FATAL_ERROR
+      "Function avformat_open_input missing. Please use a newer FFmpeg release.")
+  endif()
+
+  include_directories(${FFMPEG_LIBAVDEVICE_INCLUDE_DIRS})
+  include_directories(${FFMPEG_LIBAVFORMAT_INCLUDE_DIRS})
+  include_directories(${FFMPEG_LIBSWSCALE_INCLUDE_DIRS})
+
+  set(CMAKE_REQUIRED_DEFINITIONS -D_POSIX_SOURCE)
+  check_symbol_exists(sigaction "signal.h" HAVE_SIGACTION)
+  if (HAVE_SIGACTION)
+    add_definitions("-DHAVE_SIGACTION")
+  endif()
+
+  check_symbol_exists(strtok_r "string.h" HAVE_STRTOK_R)
+  if (HAVE_STRTOK_R)
+    add_definitions("-DHAVE_STRTOK_R")
+  endif()
+  set(CMAKE_REQUIRED_DEFINITIONS)
+
+  # xcb is used to retrieve the full screen dimensions when using x11grab
+  # as input format
+  find_package(XCB)
+  if (XCB_FOUND)
+    add_definitions("${LIBXCB_DEFINITIONS} -DHAVE_XCB")
+    include_directories(${LIBXCB_INCLUDE_DIRS})
+    set(OPTIONAL_LIBRARIES ${LIBXCB_LIBRARIES})
+  endif()
+
+  add_executable(am7xxx-play am7xxx-play.c)
+
+  target_link_libraries(am7xxx-play am7xxx
+    ${FFMPEG_LIBRARIES}
+    ${FFMPEG_LIBSWSCALE_LIBRARIES}
+    ${OPTIONAL_LIBRARIES})
+  install(TARGETS am7xxx-play
+    DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
 endif()
 
-add_executable(am7xxx-play am7xxx-play.c)
+# Build a simple usb-modeswitch clone for am7xxx devices
+option(BUILD_am7xxx-modeswitch "Build a simple usbmode-switch clone for am7xxx devices" TRUE)
+if(BUILD_am7xxx-modeswitch)
+
+  find_package(libusb-1.0 REQUIRED)
+  include_directories(${LIBUSB_1_INCLUDE_DIRS})
+
+  add_executable(am7xxx-modeswitch am7xxx-modeswitch.c)
+  target_link_libraries(am7xxx-modeswitch ${LIBUSB_1_LIBRARIES})
+  install(TARGETS am7xxx-modeswitch
+    DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
+endif()
 
-target_link_libraries(am7xxx-play am7xxx
-  ${FFMPEG_LIBRARIES}
-  ${FFMPEG_LIBSWSCALE_LIBRARIES}
-  ${LIBXCB_LIBRARIES})
-install(TARGETS am7xxx-play
-  DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")