CMake avplay: do not build the app if OpenGL or GLUT are not found

cchampet · Clement Champetier · commit 69bef532ce05 · 2014-09-23T14:21:18.000+02:00
* Print a warning if avplay app can't be built. * Allow the user to build avTranscoder library even if dependencies of this app are not found. * fix #94
diff --git a/app/cpp/avplay/CMakeLists.txt b/app/cpp/avplay/CMakeLists.txt
@@ -4,10 +4,21 @@
 set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake)
 include(AvTranscoderMacros)
 
-# Build app
-find_package(OpenGL REQUIRED)
-find_package(GLUT REQUIRED)
+# Check OpenGL
+find_package(OpenGL)
+if(NOT OPENGL_FOUND)
+	message("OpenGL not found, will not build avplay app.")
+	return()
+endif()
+
+# Check GLUT
+find_package(GLUT)
+if(NOT GLUT_FOUND)
+	message("GLUT not found, will not build avplay app.")
+	return()
+endif()
 
+# Build app
 include_directories(${AVTRANSCODER_SRC_PATH} ${FFMPEG_INCLUDE_DIR})
 include_directories( ${OPENGL_INCLUDE_DIRS}  ${GLUT_INCLUDE_DIRS} )
 
@@ -18,12 +29,12 @@ target_link_libraries(avplay avtranscoder-shared ${OPENGL_LIBRARIES} ${GLUT_LIBR
 
 # Install app
 install(
-	FILES "${CMAKE_CURRENT_BINARY_DIR}/avplay" "${CMAKE_CURRENT_BINARY_DIR}/avplay-${AVTRANSCODER_VERSION}"
-	PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE
-	DESTINATION "bin/"
+		FILES "${CMAKE_CURRENT_BINARY_DIR}/avplay" "${CMAKE_CURRENT_BINARY_DIR}/avplay-${AVTRANSCODER_VERSION}"
+		PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ GROUP_EXECUTE GROUP_READ WORLD_READ WORLD_EXECUTE
+		DESTINATION "bin/"
 )
 install(
-	FILES ${CMAKE_CURRENT_SOURCE_DIR}/avplayer.man
-	RENAME avplayer.1
-	DESTINATION "share/man/man1/"
+		FILES ${CMAKE_CURRENT_SOURCE_DIR}/avplayer.man
+		RENAME avplayer.1
+		DESTINATION "share/man/man1/"
 )
