When trying to build 3.7.1, it failed with this error,
# Java build.
ant -f debian/java-build.xml jar
Buildfile: /<<PKGBUILDDIR>>/debian/java-build.xml
generate:
[mkdir] Created dir:
/<<PKGBUILDDIR>>/java/core/target/generated-sources
[echo] src
compile:
[mkdir] Created dir: /<<PKGBUILDDIR>>/java/core/target/classes
[javac] Using javac -source 1.5 is no longer supported, switching to
6
[javac] Using javac -target 1.5 is no longer supported, switching to
6
[javac] Compiling 144 source files to
/<<PKGBUILDDIR>>/java/core/target/classes
[javac] warning: [options] bootstrap class path not set in
conjunction with -source 6
[javac] warning: [options] source value 6 is obsolete and will be
removed in a future release
[javac] warning: [options] target value 1.6 is obsolete and will be
removed in a future release
[javac] warning: [options] To suppress warnings about obsolete
options, use -Xlint:-options.
[javac]
/<<PKGBUILDDIR>>/java/core/src/main/java/com/google/protobuf/RopeByteString.java:584:
error: diamond operator is not supported in -source 6
[javac] private final ArrayDeque<ByteString> prefixesStack = new
ArrayDeque<>();
[javac]
^
[javac] (use -source 7 or higher to enable diamond operator)
[javac] 1 error
[javac] 4 warnings
BUILD FAILED
/<<PKGBUILDDIR>>/debian/java-build.xml:38: Compile failed; see the
compiler error output for details.
