RFR: JDK-8188013 symbolgenerator targets jdk 9 source

[Magnus Ihse Bursie]

In 
make/langtools/src/classes/build/tools/symbolgenerator/TransitiveDependencies.java, 
javac gets called with a fixed command line. This includes the arguments 
"-source 9 -target 9". While this was fine for jdk9, in jdk10 
this results in the following warning:

warning: [options] bootstrap class path not set in conjunction with 
-source 1.9

I presume it is a mistake that this was not updated to -source 10 
-target 10 for jdk10.

I have verified that the contents of ct.sym has not changed due to this 
patch.

I have kept the -source/-target arguments for now, and postponed the 
discussion to remove them to JDK-8188015.

Bug: https://bugs.openjdk.java.net/browse/JDK-8188013
Patch inline:
diff --git 
a/make/langtools/src/classes/build/tools/symbolgenerator/TransitiveDependencies.java 
b/make/langtools/src/classes/build/tools/symbolgenerator/TransitiveDependencies.java
--- 
a/make/langtools/src/classes/build/tools/symbolgenerator/TransitiveDependencies.java
+++ 
b/make/langtools/src/classes/build/tools/symbolgenerator/TransitiveDependencies.java
@@ -57,8 +57,8 @@
          }

          JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
-        List<String> options = Arrays.asList("-source", "9",
-                                             "-target", "9",
+        List<String> options = Arrays.asList("-source", "10",
+                                             "-target", "10",
                                               "-proc:only",
                                               "--system", "none",
"--module-source-path", args[0],


/Magnus