Building jdk9/dev using:

bash ../configure --disable-javac-server

Shows this in the build log:

...
checking whether to use sjavac... no
checking whether to use javac server... no
/home/omajid/jdk9-dev/common/autoconf/generated-configure.sh: line 62566: xno: command not found
...

This "xno: command not found" looks like a bad test in the file.

common/autoconf/build-performance.m4 contains this line:
if test "x$ENABLE_JAVAC_SERVER" = "xyes" || "x$ENABLE_SJAVAC" = "xyes"; then

There should be a "test" after the "||".