When building OpenJDK source after converting it to a different license,
the build fails because the file ASSEMBLY_EXCEPTION is missing. This
change makes the build skip including top level license files if they
don't exist.
Bug: https://bugs.openjdk.java.net/browse/JDK-8176849
Patch:
diff -r 5548e024cbcf make/copy/Copy-java.base.gmk
--- a/make/copy/Copy-java.base.gmk
+++ b/make/copy/Copy-java.base.gmk
@@ -235,8 +235,10 @@
# JDK license and assembly exception files to be packaged in JMOD
-JDK_LICENSE ?= $(TOPDIR)/LICENSE
-JDK_NOTICE ?= $(TOPDIR)/ASSEMBLY_EXCEPTION
+# The license files may not be present if the source has been obtained
using a
+# different license.
+JDK_LICENSE ?= $(wildcard $(TOPDIR)/LICENSE)
+JDK_NOTICE ?= $(wildcard $(TOPDIR)/ASSEMBLY_EXCEPTION)
$(eval $(call SetupCopyFiles, COPY_JDK_NOTICES, \
FILES := $(JDK_LICENSE) $(JDK_NOTICE), \
