java destination can't be disabled

[czanik]

While trying to package 0.4.0, without JDK in the build chroot, configure enables Java support. Compilation obviously fails:

[ 13s] GEN modules/java/java-grammar.y
[ 13s] YACC modules/java/java-grammar.c
[ 13s] d ./modules/java ./modules/java/SyslogNgClassLoader.java
[ 13s] make: d: Command not found
[ 13s] make: [modules/java/org/syslog_ng/SyslogNgDestination.class] Error 127 (ignored)
[ 13s] d ./modules/java ./modules/java/SyslogNg.java
[ 13s] make: d: Command not found
[ 13s] make: [modules/java/org/syslog_ng/SyslogNgDestination.class] Error 127 (ignored)
[ 13s] d ./modules/java -cp ./modules/java ./modules/java/SyslogNgDestination.java
[ 13s] make: d: Command not found
[ 13s] make: [modules/java/org/syslog_ng/SyslogNgDestination.class] Error 127 (ignored)
[ 13s] jar -cvf ./modules/java/SyslogNg.jar -C ./modules/java/ org
[ 13s] make: jar: Command not found
[ 13s] make: *** [modules/java/org/syslog_ng/SyslogNgDestination.class] Error 127

On --disable-java:

[ 5s] GEN modules/java/java-grammar.y
[ 5s] YACC modules/java/java-grammar.c
[ 5s] make: *** No rule to make target modules/java/SyslogNg.h', needed byall'. Stop.
[ 5s] error: Bad exit status from /var/tmp/rpm-tmp.7jm9h9 (%build)