Fix errors caught by java -Xcheck:jni.

[simgrid.git] / examples / java / io / CMakeLists.txt

diff --git a/examples/java/io/CMakeLists.txt b/examples/java/io/CMakeLists.txt
index 0165381..767e4d6 100644 (file)
--- a/examples/java/io/CMakeLists.txt
+++ b/examples/java/io/CMakeLists.txt
@@ -1,16 +1,22 @@
 cmake_minimum_required(VERSION 2.6)
 
+set(example java_io)
 set(sources
   ${CMAKE_CURRENT_SOURCE_DIR}/IO.java
   ${CMAKE_CURRENT_SOURCE_DIR}/Node.java
   )
 
 if(enable_java)
-  add_custom_target(java_io ALL
-    COMMENT "Building java_io..."
-    COMMAND ${JAVA_COMPILE} -cp ${CMAKE_BINARY_DIR}/simgrid.jar
-                            -d ${CMAKE_CURRENT_BINARY_DIR}/.. ${sources})
-  add_dependencies(java_io SG_java_jar)
+  add_custom_command(
+    COMMENT "Building ${example}..."
+    OUTPUT ${example}_compiled
+    DEPENDS ${sources} SG_java_jar ${SIMGRID_JAR}
+    COMMAND ${JAVA_COMPILE} -cp ${SIMGRID_JAR}
+                             -d ${CMAKE_CURRENT_BINARY_DIR}/.. ${sources}
+    COMMAND ${CMAKE_COMMAND} -E remove ${example}_compiled
+    COMMAND ${CMAKE_COMMAND} -E touch ${example}_compiled
+  )
+  add_custom_target(${example} ALL DEPENDS ${example}_compiled)
 endif()
 
 set(tesh_files