The nashorn java code requires a somewhat convoluted compilation. As a
result, we use a special java compiler setup,
GENERATE_NEWBYTECODE_DEBUG. This explicitly lists -source 9 -target 9,
which generates this warning:
warning: [options] bootstrap class path not set in conjunction with
-source 1.9
when building in jdk10. I assume this is just a mistake, and that it
should really target 10. (Or, to always be in sync, perhaps even
$(VERSION_MAJOR)).
Bug: https://bugs.openjdk.java.net/browse/JDK-8188012
Patch inline:
diff --git a/make/BuildNashorn.gmk b/make/BuildNashorn.gmk
--- a/make/BuildNashorn.gmk
+++ b/make/BuildNashorn.gmk
@@ -41,7 +41,7 @@
$(eval $(call SetupJavaCompiler, GENERATE_NEWBYTECODE_DEBUG, \
JVM := $(JAVA_JAVAC), \
JAVAC := $(NEW_JAVAC), \
- FLAGS := -g -source 9 -target 9 --upgrade-module-path
"$(JDK_OUTPUTDIR)/modules/" \
+ FLAGS := -g -source 10 -target 10 --upgrade-module-path
"$(JDK_OUTPUTDIR)/modules/" \
--system none --module-source-path $(call GetModuleSrcPath), \
SERVER_DIR := $(SJAVAC_SERVER_DIR), \
SERVER_JVM := $(SJAVAC_SERVER_JAVA)))
/Magnus
