[rfc][icedtea-web] fix jdk9 jre recognition

[Omair Majid]

* Jiri Vanek <jvanek at redhat.com> [2015-04-27 10:26]:
> Now, when one is building itw with jdk9, he have to specify jre. It is pretty simple by something like:
> ./configure --prefix=/home/jvanek/icedtea-web-image --with-firefox=no
> --with-jdk-home=/usr/lib/jvm/java-1.9.0-openjdk
> --with-jre-home=/usr/lib/jvm/java-1.9.0-openjdk
> 
> But you really have to specify them both. As jdk9 do noth ave jre direcotry.
> 
> This change should happily do it.

I think this needs a bit more time to be baked.

> +++ b/acinclude.m4	Mon Apr 27 16:21:37 2015 +0200

> +    AC_MSG_RESULT(${SYSTEM_JDK_DIR} (readlink to ${READ}))

Also, s/readlink/link/

> +    SYSTEM_JRE_DIR8="${SYSTEM_JDK_DIR}/jre"

This is true for 7 and 6 as well. Consider renaming the variable?

> +    # try jdk7 or 8 coomliant

Typo.

> +    if [[ -d "${SYSTEM_JRE_DIR8}" -a -e "${SYSTEM_JRE_DIR8}/bin/java" -a -e "${SYSTEM_JRE_DIR8}/lib/rt.jar" ]]; then

This is m4: [ and ] quote a string. You should use `test` explicitly,
like in the code a few lines above this.

Thanks,
Omair

-- 
PGP Key: 66484681 (http://pgp.mit.edu/)
Fingerprint = F072 555B 0A17 3957 4E95  0056 F286 F14F 6648 4681