RFR: JDK-8030794: Update configure to require jdk8 as boot

[Chris Hegarty]

Looks good to me.

-Chris.

On 16/04/14 11:01, Erik Joelsson wrote:
> There are now changes in jdk9 which prohibit the use of jdk7 as boot jdk
> (unless the update version is high enough). It's time we formally change
> the requirement from jdk7 to jdk8 by making configure require it.
>
> Bug: https://bugs.openjdk.java.net/browse/JDK-8030794
> Patch:
>
> diff -r 1dfbd8aa5d3d common/autoconf/boot-jdk.m4
> --- a/common/autoconf/boot-jdk.m4
> +++ b/common/autoconf/boot-jdk.m4
> @@ -82,10 +82,10 @@
>               BOOT_JDK_VERSION=`"$BOOT_JDK/bin/java" -version 2>&1 |
> head -n 1`
>
>               # Extra M4 quote needed to protect [] in grep expression.
> -            [FOUND_CORRECT_VERSION=`echo $BOOT_JDK_VERSION | grep
> '\"1\.[789]\.'`]
> +            [FOUND_CORRECT_VERSION=`echo $BOOT_JDK_VERSION | grep
> '\"1\.[89]\.'`]
>               if test "x$FOUND_CORRECT_VERSION" = x; then
>                 AC_MSG_NOTICE([Potential Boot JDK found at $BOOT_JDK is
> incorrect JDK version ($BOOT_JDK_VERSION); ignoring])
> -              AC_MSG_NOTICE([(Your Boot JDK must be version 7, 8 or 9)])
> +              AC_MSG_NOTICE([(Your Boot JDK must be version 8 or 9)])
>                 BOOT_JDK_FOUND=no
>               else
>                 # We're done! :-)
>